Christopher Adams, MD
Vice President, Global Medical Education
Mark Ferguson, MBChB, FCS(SA)Ortho
Director of Medical Education
Arthrex APAC
Markus Kowarsch, MD
Senior Medical Education Manager
Arthrex EMEA
Jesus Sevillano, MD
Senior Medical Education Manager
Arthrex Latin America
Jamie Bradshaw, PA-C, MPAS
Senior Medical Education Manager Orthopedic Trauma, Representative and Online Training
Perfay Cody, MD
Senior Clinical Specialist
Michelle DiLella, MD
Senior Clinical Specialist
Georg Elhardt, MD
Clinical Specialist
Arthrex EMEA
Luis Alberto Espinoza Lira
Senior Clinical Specialist
Mike Fisher, PA-C, MPAS
Medical Education Manager
Arthrex Australia
Robert Greer
Medical Education Manager
Arthrex New Zealand
Young Hun Ha
Associate Medical Education Manager
Arthrex Korea
Jonathan Hernández, MD
Senior Clinical Specialist
Arthrex Mexico
Aaron Hewitt, PA-C, MS
Medical Education Manager
Lab & Exhibits
Robert Kalapos, MD
Clinical Specialist
Jay Kaszyca, PA-C, MPAS
Senior Clinical Specialist
Bethlyn Katz, PA-C
Senior Clinical Specialist
Lars Kreiselmeier
Clinical Specialist
Arthrex EMEA
Nao Matsuki
Medical Education Manager
Arthrex Japan
Israel López Mercado
Clinical Specialist, Jr.
Arthrex Mexico
Sonja Obeser
Supervisor Surgical Skills Education
Arthrex EMEA
Jay Peterson, PA-C, MSBS
Clinical Specialist
Friederike Prott
Clinical Specialist
Arthrex EMEA
Justina Ray, PA-C, MPAS
Senior Clinical Specialist
George Rego, PA-C, MPAS, MPH
Principal Clinical Specialist
Felix Riano, MD
Senior Medical Education Manager
Hand, Wrist and Elbow
Tim Roberts
Clinical Specialist
Henrik Röhsler
Clinical Specialist
Arthrex EMEA
Amanda Salandy, PA-R, MSc
Senior Clinical Specialist
Ryan Shamus, PA-C, MPAS
Medical Education Manager
Shoulder, Knee and Hip
Marc Stoll, PA-C
Medical Education Manager
Orthobiologics, Spine, Foot and Ankle
Dan Veronie, PA-C, MS
Clinical Specialist
Ryan Westbrook, PA-C, MS
Principal Clinical Specialist
Alexandra Adelaide Wittwer
Clinical Specialist
Arthrex EMEA
Rainer Zeis, MD
Clinical Specialist
Arthrex Latin America
Violetta Ziemann, RN
Clinical Specialist
Arthrex EMEA
Christopher Adams, MD
Vice President of Global Medical Education
Dr. Adams was born and raised just outside of Buffalo, New York. He completed his orthopedic surgery residency at The Mayo Clinic in Rochester, Minnesota, and a shoulder surgery fellowship with Dr. Stephen Burkhart in San Antonio, Texas. For several years, Dr. Adams lived in Jupiter, Florida, where he had a very active clinical practice treating patients with shoulder problems. While running his clinical practice, Dr. Adams was also very involved in research and teaching shoulder surgery all over the country. In 2014, Dr. Adams joined the Arthrex Medical Education team to pursue his passion for education.
Felix Riano, MD
Senior Medical Education Manager
Hand, Wrist and Elbow
Originally from Bogota, Colombia, Dr. Riano completed orthopedic surgery residency at Universidad Militar Nueva Granada in Bogota. He enjoyed a full military career and retired as major from the Colombian Air Force Medical Corps. Dr. Riano attended hand, upper extremity and microsurgery fellowships with Dean Soteranos, MD, at the University of Pittsburgh, Mark Baratz, MD, at Allegheny General Hospital of Pittsburgh, and Anne E. Ouelette, MD, at Jackson Memorial Hospital in Miami. To pursue his passion for education, Dr. Riano joined Arthrex in 2007. He worked diligently to build what is recognized as the gold standard for industry-leading medical education programs for foot and ankle surgery, and now he has been tasked to accomplish the same for hand and wrist surgery.
Marc Stoll, PA-C
Medical Education Manager
Orthobiologics, Spine, Foot and Ankle
Originally from Hollywood, Florida, Mr. Stoll earned his physician assistant degree from Nova Southeastern University (Florida). Mr. Stoll began his career in orthopedic surgery in 1999 with a busy orthopedic group in Fort Myers, Florida. He has extensive experience in sports medicine, adult reconstruction, orthopedic trauma and extremity surgery. Mr. Stoll was also active in providing team medical coverage for the Minnesota Twins, Florida Everblades hockey and local high school teams. In 2010, Mr. Stoll joined Arthrex Medical Education in support of the Sports/Arthroplasty team and in 2017 has transitioned to manage the Foot and Ankle division.
Jamie Bradshaw, PA-C, MPAS
Senior Medical Education Manager Representative and Online Training
Mr. Bradshaw is originally from Lakeland, Florida. He spent much of his career serving in the U.S. Navy. Starting out as an enlisted hospital corpsman, Mr. Bradshaw was selected for physician assistant training leading to his commissioning as an officer in the Navy Medical Service Corps. He earned his Bachelor of Science degree in physician assistant studies from The George Washington University in Washington, D.C., and went on to earn a master’s degree in physician assistant studies from the University of Nebraska. He was selected to attend an orthopedic surgery fellowship program for PAs. Mr. Bradshaw worked in a general military orthopedic surgery setting doing sports medicine and trauma. In 2008, Mr. Bradshaw retired from the Navy as a Lieutenant Commander with 22 years of service. He moved to Naples in 2010 to join the Arthrex Medical Education team, focusing on distal extremity surgery and orthobiologics. In 2020, Mr. Bradshaw assumed the role of Senior Medical Education Manager of Representative and Online Training.
George Rego, PA-C, MPAS, MPH
Principal Clinical Specialist
Mr. Rego practiced clinically as a physician assistant for more than 10 years in Naples, Florida. Originally from Hialeah, Florida, he completed his medical training at the University of Florida College of Medicine and was awarded with a master of physician assistant studies degree. Prior to entering PA school, Mr. Rego received a bachelor of science degree in biology and a master of public health degree from the University of South Florida. As a PA, he has worked in the fields of gastroenterology and pulmonary medicine, but spent most of his career in orthopedic surgery. Pursuing professional leadership positions at the highest levels, Mr. Rego served as the vice president of the Florida Academy of Physician Assistants (FAPA) from 2002 to 2004. He served as president of FAPA for the 2015-2016 term. Mr. Rego has a special interest in hip, knee and shoulder arthroscopic surgery. Mr. Rego currently serves on the University of Florida’s School of Physician Assistant Studies Alumni Advisory Council. In 2018, he was named the Bob Scully Physician Assistant of the Year by the FAPA. More info.
Jay Kaszyca, PA-C, MPAS
Senior Clinical Specialist
Mr. Kaszyca is originally from Port Huron, Michigan. He pursued his undergraduate degree from Michigan State University and he went on to earn his master’s degree in physician assistant studies from Grand Valley State University in Grand Rapids, Michigan. Before joining Arthrex in 2014, Mr. Kaszyca spent his entire 10 years of clinical practice in orthopedic surgery, where he specialized in knee, shoulder and hip sports medicine as well as knee, hip and shoulder arthroplasty. During this time, he was very active in state and national physician assistant professional organizations, and was elected to serve as the president of the Michigan Academy of Physician Assistants from 2013-2014. From November 2016 to September 2017, Mr. Kaszyca served as the Medical Education manager for Arthrex APAC based in Singapore. During that time he helped to build and implement the medical education program for the ArthroLab Singapore, which supports the subsidiaries based in Japan, Korea and China, and distributors throughout the ASEAN region.
Michelle DiLella, MD
Senior Clinical Specialist
Originally from Port Huron, Michigan, Dr. DiLella now makes her home in Naples, Florida, after joining the Arthrex Medical Education team in 2014. Dr. DiLella began her medical career as a licensed EMT in Michigan. She earned her Bachelor of Science degree in human biology from Michigan State University and completed medical school at St. Matthew’s University School of Medicine in Grand Cayman. Dr. DiLella initially became interested in musculoskeletal medicine after being exposed to the field while competing on the national level as a gymnast. Her current focus is in surgery of the foot and ankle, hand and wrist, trauma, orthobiologics and ultrasound. With a true passion for teaching, Dr. DiLella is a certified basic life support instructor and enjoys volunteering in the community.
Dan Veronie, PA-C, MS
Clinical Specialist
Born and raised in South Holland, Illinois, Mr. Veronie obtained his bachelor’s and master’s degrees in Kinesiology at the University of Illinois Urbana-Champaign in 2005 and 2007, respectively. He became certified as an athletic trainer and provided sports medicine coverage to Chicago-area high schools and outreach programs until deciding to further his education as a physician assistant. Graduating from Rosalind Franklin University in 2012, Mr. Veronie began his physician assistant career in Greeley, Colorado, primarily in sports medicine, while assisting in the trauma, arthroscopy and upper extremity departments. He returned to the Midwest and focused on his sports medicine career in Grand Rapids, Michigan by practicing with two fellowship-trained sports medicine surgeons who specialized in shoulder, knee, and hip arthroscopy, including cartilage restoration and biologic augmentation. Mr. Veronie joined the Arthrex Medical Education Sports and Arthroplasty team in July 2020.
Jay Peterson, PA-C, MSBC
Clinical Specialist
Mr. Peterson is originally from Warren, Michigan. He received his bachelor’s degree (sports medicine/athletic training) from the University of Detroit Mercy and master’s degree (physician assistant studies) from The Medical College of Ohio (now The University of Toledo). Before joining Arthrex in 2020, Mr. Peterson gained a wealth of experience both in orthopedics and physician assistant education. His clinical work in orthopedics includes 8 years working alongside a sports medicine fellowship-trained orthopedic surgeon. His PA education work experience includes serving in Assistant and Associate Professor positions as well as Founding Program Director of a PA education program in Michigan. He has been active in state and national physician assistant professional organizations. Mr. Peterson joined the Arthrex Medical Education Sports and Arthroplasty team in July 2020.
Ryan Westbrook, PA-C, MS
Principal Clinical Specialist
Mr. Westbrook is originally from Fairfax, Virginia and received his masters of science as a physician assistant from George Washington University in Washington, D.C. in 2007. Mr. Westbrook spent his clinical years in a busy orthopedic trauma practice at a large regional trauma center. His love for education developed while working with orthopedic and podiatric residents as well as serving as adjunct faculty for the PA program at George Washington University. He joined Arthrex Medical Education in 2015. In addition to his passion for orthopedic trauma, Mr. Westbrook provides surgeon education for subspecialists in foot and ankle.
Amanda Salandy, PA-R, MSc
Senior Clinical Specialist
Mrs. Salandy completed her education in the UK and relocated from England, where she was born and raised, to the U.S. in 2015. After completing her bachelor's degree in anatomy and human biology at the University of Liverpool, she went on to work in the physiotherapy department for a specialist inpatient rehabilitation unit at Isebrook Hospital, Wellingborough, UK. With a passion for health care and medicine, she continued her studies at the University of Birmingham, graduating with a master’s degree in physician associate studies. Excited to work in orthopedics, Mrs. Salandy was the first UK-trained PA to work at the Royal National Orthopaedic Hospital (RNOH) in Stanmore, UK, where she joined the Foot and Ankle team and gained invaluable experience in foot and ankle conditions from her supervising surgeons. Mrs. Salandy joined Arthrex in 2016 to work on the Distal Extremities Medical Education team.
Ryan Shamus, PA-C, MPAS
Medical Education Manager
Shoulder, Knee & Hip
Mr. Shamus has practiced as an orthopedic physician assistant in Southwest Florida since 2005. A Miami, Florida native, he completed his undergraduate study in physiology/kinesiology at the University of Florida. He continued his studies at the University of Florida and graduated with a master’s degree from the university’s College of Medicine. Mr. Shamus has a focused interest in total joint arthroplasty as that was the majority of his practice. He has assisted in more than 10,000 joint replacement surgeries. Mr. Shamus joined the Arthrex Medical Education team in 2016 as a Clinical Specialist and then transitioned to manager of the sports medicine and arthroplasty team in 2020.
Justina Ray, PA-C, MPAS
Senior Clinical Specialist
Originally from Indiana, Pennsylvania, Ms. Ray earned both her Bachelor of Science and Master of Physician Assistant Sciences degrees at Saint Francis University (Pennsylvania) in 2005 and 2006, respectively. Prior to joining the Arthrex Medical Education Sports and Arthroplasty team in 2016, she practiced orthopedic surgery and traumatology in Pittsburgh, Pennsylvania for 11 years. In her broad scope of practice, she spent several years working at a Level 1 trauma center with the orthopedic trauma service and five-plus years practicing with a sports medicine fellowship-trained orthopedic surgeon specializing in shoulder and knee arthroscopy, as well as musculoskeletal ultrasound.
Tim Roberts
Clinical Specialist
Mr. Roberts is originally from Long Island, New York. There, he obtained both his Bachelor of Science and Master of Physician Assistant Studies degrees at Stony Brook University. Mr. Roberts has over nine years of experience as a board-certified physician assistant in many areas of medicine including emergency medicine and pediatrics, but most of his career was spent working in orthopedics. He has practiced in the subspecialties of spine surgery and pediatric orthopedics but spent the most time specializing in foot and ankle trauma, reconstruction, and sports injuries. During the last few years of his clinical practice, Mr. Roberts also established and ran a walk-in urgent care orthopedic clinic staffed completely with physician assistants. In 2020, he moved to Naples, Florida to join the Arthrex foot and ankle medical education team.
Bethlyn Katz, PA-C
Senior Clinical Specialist
Mrs. Katz is originally from Long Island, New York. Her passion for sports medicine began while earning her Bachelor of Science degree in athletic training. After working as a certified athletic trainer for two years with an NCAA Division I Sports Program on Long Island, she pursued a degree in physician assistant studies from Hofstra University. As a board-certified physician assistant, Mrs. Katz practiced orthopedic surgery for seven years under a sports medicine fellowship-trained orthopedic surgeon, specializing in shoulder, knee and hip arthroscopy, as well as musculoskeletal ultrasound. She joined the Medical Education Sports and Arthroplasty team in 2017.
Mike Fisher, PA-C, MPAS
Medical Education Manager
Mr. Fisher is originally from Canberra, Australia. He relocated to the United States to play collegiate baseball in St. Louis, Missouri, where he earned a Bachelor of Science degree in athletic training and a Master of Arts degree in sports management from Lindenwood University. He worked as an athletic trainer for several years prior to attending the University of Utah School of Medicine, where he graduated with a master’s degree in physician assistant studies. Prior to moving to Naples to join the Arthrex Medical Education department, he worked in a spine, general orthopedic and pain management clinic in California and then in orthopedic trauma at the Andrews Institute in Pensacola, Florida. Mr. Fisher has published several articles and is a current reviewer for JBJS Journal of Orthopaedics for Physician Assistants.
Rainer Zeis, MD
Clinical Specialist
Arthrex Latin America
Dr. Rainer Zeis is originally from Valencia, Venezuela. He now makes his home in Naples, Florida. Dr. Zeis completed medical school at Carabobo University in Venezuela. He completed his orthopedic residency at Doctor Carlos Arvelo Hospital in Caracas, Venezuela. In 2008, he completed a fellowship in sports medicine and adult reconstruction in Colombia. Dr. Zeis spent 7 years in private practice, focusing on sports medicine, trauma and arthroplasty at Atias Clinic in Caracas. He spent 5 years in Central University as Clinical Professor in the Orthopedic Surgery Program. Dr. Zeis joined Arthrex Medical Education Team in 2018 to pursue his passion for education and provide medical education in Latin America.
Jesus Sevillano, MD
Latin America Senior Medical Education Manager
Dr. Sevillano is originally from Caracas, Venezuela. He worked as a consultant for Arthrex for five years, participating in corporate courses for Latin America. After working in our Mexico City subsidiary for more than a year, he now makes his home in Naples, Florida. Dr. Sevillano attended residency in orthopedic surgery at Miguel Perez Carreño Hospital, Central University of Venezuela and Perez de Leon Hospital in Caracas, Venezuela. In 2004, he went on to complete a fellowship in sports medicine and adult reconstruction at Advanced Orthopedic Centers in Richmond, Virginia, with Dr. Richard Worland. Dr. Sevillano spent 10 years in private practice, focusing on sports medicine, orthopedic trauma and arthroplasty at Policlínica Metropolitana in Caracas. His professional activity outside the operating room includes serving as president of the Medical Society of Policlínica Metropolitana in 2013-2014, and scientific coordinator of the Shoulder Committee for the Venezuelan Society of Orthopedic Surgeons from 2013-2014. Dr. Sevillano joined Arthrex in 2014 to provide medical education throughout Central and South America.
Perfay Cody, MD
Senior Clinical Specialist
Dr. Cody is originally from Cali, Colombia. He now makes his home in Naples, Florida. Dr. Cody completed medical school at University Cooperativa de Colombia. He spent his early career as a medical doctor at San Pedro Claver Hospital in Bogota, Colombia. His orthopedic experience began in 2005, when he made the move to become a clinical specialist and regional sales manager for an orthopedic medical device company in Jacksonville, Florida. He then spent several years focused on orthopedic surgical soft-tissue repair and orthobiologics for domestic and international markets. In 2012, Dr. Cody joined Arthrex as a clinical specialist, supplying educational resources to orthopedic surgeons and the Arthrex business partners in the Southern Hemisphere, from Latin America to the Pacific Rim and beyond.
Luis Alberto Espinoza Lira
Senior Clinical Specialist
Arthrex Mexico
Mr. Espinoza, who has practiced as a surgical technician for more than 5 years, is originally from Nueva Rosita, Coahuila, where he trained at Hospital Espanol. Before moving into a sales role, Mr. Espinoza worked more than 1500 knee and shoulder arthroscopy surgeries. He began working for Arthrex Mexico in 2003 as part of the sales team and supported medical education activities through 2009. Mr. Espinoza has participated in surgery skills courses, lectured on surgical techniques, and taught arthroscopy skills. He moved to Querétaro to work in Alianza Médica SA de CV for a year. Upon returning to Arthrex Mexico, Mr. Epsinoza continued supporting product specialists and sales supervisors. In 2014, he moved into the role of clinical specialist for the Arthrex Mexico Medical Education team, with a special interest in shoulder and knee arthroscopic surgery.
Israel López Mercado
Clinical Specialist Jr.
Arthrex Mexico
Mr. López has worked as a technician for more than five years and a sales representative for four years. Originally from the State of Mexico, Mr. López has worked more than 1,300 surgeries in the field of knee, shoulder, and foot and ankle arthroscopy. Prior to arrival at Arthrex Mexico, he participated in counseling activities for doctors, specializing in shoulder and knee arthroscopy. Mr. López joined Arthrex Mexico in 2011, where he became part of the sales department as a sales representative until 2015. He left his role in sales to become part of the Medical Education team as a junior clinical specialist. Mr. López is interested in sports medicine surgeries.
Jonathan Hernández, MD
Senior Clinical Specialist
Arthrex Mexico
Doctor Hernández is originally from Coahuila and relocated from Mexico City where he completed his education. Dr. Hernández obtained his bachelor’s degree in UNAM, during his major he went on to work in surgical training at different hospitals. Then he worked for a third party by COFEPRIS for three years where he helped other companies to get their medical devices and drugs registration approvals, among which orthopedic devices. Motivated by treating patients better, he joined Arthrex in 2018 as a Clinical Specialist providing Medical Education with special interest in shoulder, knee, hip and distal extremities arthroscopy surgery.
Markus Kowarsch, MD
Senior Medical Education Manager
Eastern Hemisphere
Dr. Kowarsch is originally from Heidelberg, Germany, and now resides in Munich. He attended medical school at Ruprecht-Karls-University in Heidelberg and went on to complete his dissertation and graduate from Heidelberg University with a doctorate degree in orthopedics. Early in his surgical career Dr. Kowarsch served as an orthopedic and traumatology surgeon in the Kantonsspital of St. Gallen, Switzerland, The University of Innsbruck, Austria, and The University of Mannheim, Germany. After becoming an orthopaedic surgeon, his interest in sports surgery grew as a result of his service to the German Ski Association as an alpine ski instructor and his passion for sports. Dr. Kowarsch joined Arthrex in 2006 as a senior product manager for knee and hip arthroscopy in Munich. To pursue his passion for education, he transitioned to the Medical Education team in 2010. Dr. Kowarsch is active in managing sports surgery surgical skills courses throughout the EMEA region.
Tim Roberts
Clinical Specialist
Mr. Roberts is originally from Long Island, New York. There, he obtained both his Bachelor of Science and Master of Physician Assistant Studies degrees at Stony Brook University. Mr. Roberts has over nine years of experience as a board-certified physician assistant in many areas of medicine including emergency medicine and pediatrics, but most of his career was spent working in orthopedics. He has practiced in the subspecialties of spine surgery and pediatric orthopedics but spent the most time specializing in foot and ankle trauma, reconstruction, and sports injuries. During the last few years of his clinical practice, Mr. Roberts also established and ran a walk-in urgent care orthopedic clinic staffed completely with physician assistants. In 2020, he moved to Naples, Florida to join the Arthrex foot and ankle medical education team.
Violetta K. Ziemann, RN
Clinical Specialist
Ms. Ziemann is originally from Danzig, Poland. She now makes her home near Munich, Germany. She completed nursing school and completed her theatre practitioner training at the University Clinic in Lübeck, Germany. She also attended Oxford Brookes University in the United Kingdom studying management in health and social care. Ms. Ziemann began her career working as an RN in a surgical setting in 2002. She has experience as a senior theater practitioner RN in six different multidisciplinary hospitals in Germany, United Kingdom, Australia and Austria, focusing on orthopedic surgery and trauma. Prior to joining Arthrex in 2013, she was the RN manager of an operative theater in Austria. Ms. Ziemann is a clinical speciality for Distal Extremities, instructing surgeons on techniques and managing DEX international courses run by Arthrex.
Henrik Röhsler
Clinical Specialist
Mr. Röhsler is originally from a small city near Dresden, Germany, and now makes his home near Munich. He began his career in musculoskeletal medicine in 2006, after studying and becoming certified in physiotherapy by the German State. Mr. Röhsler has worked in a wide range of professional settings, including supporting athletes and sports teams. He also has worked at University Hospital in Munich supporting orthopedic surgery groups before joining Arthrex in 2014. Since 2017, he is responsible for the veterinary field as well. Mr. Röhsler travels throughout the EMEA to support medical education courses.
Lars Kreiselmeier
Clinical Specialist
Mr. Kreiselmeier was born in Schweinfurt close to the famous Franconian wine region in the northern part of Bavaria. He studied sports science with a focus on prevention and rehabilitation at the Technical University in Munich. As a trainer for visually impaired athletes he was part of the Nordic Paraski Team Germany and guided his athletes in Nordic skiing and in athletics. During his career, Mr. Kreiselmeier worked at a famous Munich sports store as a specialist in running and skiing. Prior to joining Arthrex in 2010 he worked as a sales representative for sports medicine and as an ArthroLab coordinator. In 2015 he joined the Medical Education Team as Clinical Specialist for Sports Medicine and Arthroplasty instructing surgeons in surgical techniques and managing national and international courses run by Arthrex. Since 2017 he has also provided support in the veterinary field.
Sonja Obeser
Supervisor Surgical Skills Education
Ms Obeser originally comes from a small town near Augsburg. Today she lives in Augsburg. She is a Bachelor Professional of Health and Social Services (CCI) and completed further training in the field of radiation protection. Before joining Arthrex, Ms Obeser worked as an operating theatre assistant (OTA) in the operating theatre of an orthopaedic clinic. During her time in the operating theatre as a second or third assistant in surgical procedures, she was able to gain experience in endoprosthetics and arthroscopic surgery. Today, Ms Obeser works as a Supervisor Surgical Skills Education. She is responsible for organising the courses in the ArthroLab and is also responsible for compliance with radiation protection at Arthrex GmbH.
Georg Elhardt, MD
Clinical Specialist
After studying medicine in Munich, Germany, Dr. Georg Elhardt furthered his training in traumatology and orthopedics at several hospitals in Munich and Cameroon (Western Africa). For 10 years, he worked in a hospital in Ebersberg, near Munich, leading the ward for traumatology, orthopedics, and reconstructive surgery. Dr. Elhardt also trained in emergency medicine, ATLS, and chiropractic medicine. He joined Arthrex in 2019 and supports surgeons in the ArthroLab, focusing on Distal Extremities.
Mark Ferguson, MBChB, FCS(SA)Ortho
Director Medical Education APAC
Arthrex APAC
Dr. Mark Ferguson obtained his undergraduate degree from the University of Stellenbosch (South Africa) before completing his orthopedic residency at the University of the Witwatersrand, Johannesburg. He completed a sports medicine fellowship with Dr. Clive Noble before embarking on an observership tour throughout the U.S. Based on his experience at the Hospital for Special Surgery, the Southern California Orthopedic Institute and the American Sports Medicine Institute, Birmingham, he returned to open the Centre for Sports Medicine and Orthopaedics in Johannesburg in 1994. He was involved in the treatment of sportsmen of all sports disciplines from social to provincial, national and international levels. He has worked to provide the best innovative therapies for his patients. His main interests were knee, shoulder and sports traumatology. Prior to his full-time appointment to Director of Medical Education for the APAC region (based in Singapore) in 2017, he was an educational consultant for Arthrex for 12 years.
Robert Greer
Medical Education Manager
Arthrex New Zealand
Mr. Greer is originally from Waihi, A small town on the East Coast of New Zealand’s North Island. After finishing High School he moved to Auckland to study a Bachelor of Physical Education, Health and Outdoor Education. Upon finishing his 4 year degree in Auckland, Mr. Greer went on to teach Physical Education at one of the largest High Schools in the country. This then lead him to travelling the world for 5 years in countries such as Canada and England. Once returning to his homeland Mr. Greer went on to work for Arthrex’s New Zealand distributor at the time in a range of roles and finished up in a Territory Leader/Senior Sales role after 7 years of service. With Arthrex’s shift to a direct model in Australasia at the start of 2021, Mr. Greer has taken on the role of Medical Education and Training manager for New Zealand. In what will be a very exciting time for Arthrex in Australia and New Zealand, Mr. Greer is looking forward to paving the way for Medical Education in Aotearoa.
Nao Matsuki
Medical Education Manager
Arthrex Japan
Ms. Matsuki is originally from Osaka, Japan. Ms. Matsuki lived in Washington for nearly four years before returning to Japan in 2003 to attend university. She graduated from Sophia University, Tokyo, in 2006 with a bachelor’s degree. After graduating, she worked as a sales representative in trauma and orthopedics where she gained valuable experiences consulting with health care professionals and attending operations. Ms. Matsuki joined Arthrex Japan in 2011 as a sales representative. In 2014, she was selected to be sales trainer, responsible for cultivating reliable and knowledgeable sales representatives. In 2016, Ms. Matsuki left her position in sales to take on a new role as Medical Education manager to oversee international and domestic events in Japan and cadaver trainings in Singapore.
Young Hun Ha
Associate Medical Education Manager
Arthrex Korea
Mr. Ha is from Seoul, South Korea. He lived in Austin, Texas for three years before returning to Korea in 2003. In 2006, he moved to the United States to attend the University of Illinois, Urbana-Champaign to study cell biology. He joined Arthrex Korea as an Associate Medical Education Manager in July 2014. Mr. Ha’s role primarily includes health care professional and Arthrex Representative education, including domestic and international cadaveric workshops and mobile labs.
Aaron Hewitt, PA-C, MS
Medical Education Manager
Lab & Exhibits
Originally from Cass City, Michigan, Mr. Hewitt earned both his Bachelor of Science (Athletic Training) and Master of Physician Assistant Studies degrees at Central Michigan University in 1998 and 2002, respectively. He has experience in the National Football League with the Minnesota Vikings as an Assistant Athletic Trainer. Prior to joining the Arthrex Medical Education Sports and Arthroplasty team in 2018, he served for 16 years as the Physician Assistant Manager as a part of his practice at the OrthoCarolina Sports Medicine and Cartilage Restoration Institute. Having a strong interest in education, Aaron has been recognized by the American Academy of Physician Assistants (AAPA) as a distinguished preceptor. He currently serves as the AAPA Liaison to the American Academy of Orthopaedic Surgeons and is a reviewer for JBJS Journal of Orthopaedics for Physician Assistants.
Robert Kalapos, MD
Clinical Specialist
Originally from Budapest, Hungary, Dr. Kalapos moved to the U.S. to pursue his Bachelors of Science in Biology, which he obtained with Honors from the California State University, Long Beach in 2007. He then began his medical studies as a Dental Student between 2008 – 2011 at Semmelweis University in Budapest, Hungary. Dr. Kalapos decided to switch career paths and transferred to the Medical University of Pécs, obtaining his Doctor of Medicine degree in 2016. He is fluent in English, Hungarian and French. In 2018, Dr. Kalapos joined Arthrex as an Associate Clinical Specialist supporting the Hand, Wrist and Elbow Team.
Friederike Prott
Clinical Specialist
Friederike Prott originally comes from a small city near Münster in the German state of North Rhine-Westphalia. She currently lives in Munich. After having completed her apprenticeship in pediatric nursing, Miss Prott worked at the University Hospital in Münster as a registered nurse. Driven by her passion for medicine, Miss Prott then proceeded to attend the Baden-Wuerttemberg Cooperative State University in Karlsruhe and earn her bachelor´s degree in Physician Assistance. Before she joined our staff at Arthrex in 2020 she was employed as a Physician Assistant at the Sports Clinic in Stuttgart. Miss Prott is a member of our Medical Education team where she supports us in her role as a Clinical Specialist, focusing on distal extremities. Her prime responsibilities center on the instruction and consultation of physicians and surgical stuff regarding the appliance of our products during surgical interventions.
Alexandra Adelaide Wittwer
Clinical Specialist
Mrs. Wittwer is originally from Adelaide, Australia. After her relocation to Germany, she completed her degree in Nursing at the Ludwig-Maximilian-University (LMU) in Munich before completing her bachelor’s degree in Business Administration majoring in Project Management at the Munich University of Applied Sciences. With a passion for health care and medicine, she spent some years working for various companies in sales and education related roles before joining Arthrex at the beginning of 2016. At Arthrex Mrs. Wittwer continued with her sales affinity in Business Management and International Sales Strategy & Implementation for Distal Extremities. Over the years, she implemented and modified our Initial Onsite Training for our new Representatives. With her passion for medicine and educational expertise, she is now a valuable part of the Medical Education Team as Clinical Specialist for Distal Extremities.
