Shoulder Innovations | About Us
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More than 10 years ago, the Shoulder Innovations team developed inset glenoid fixation technology, creating a robust and stable glenoid platform.


With more than 125 cumulative years of shoulder surgical experience our clinical team can attest to the simplified process of the Shoulder Innovations system.

The company’s leadership team has more than a century of cumulative experience engineering and launching a significant portion of the current shoulder replacement systems on the market today.


Together, the Shoulder Innovations team will continue their track record of bringing innovative orthopedic solutions that exceed the expectations of patients, surgeons and health care systems.


A driven, world-class surgeon team.


Dr. Robert Tashjian, MD

Surgeon Designer

University of Utah

Salt Lake City, Utah

Dr. Tashjian is an Associate Professor of Orthopaedics at the University of Utah School of Medicine in Salt Lake City, UT specializing in shoulder and elbow surgery. Dr. Tashjian received his MD from Tufts University School of Medicine in Boston, MA. He completed an Orthopaedic residency at Brown Medical School, followed by an Orthopaedic trauma fellowship at Brown. He completed an additional fellowship in shoulder and elbow surgery at Washington University in St. Louis.


Dr. Chris Chuinard, MD

Surgeon Designer

Great Lakes Orthopedics

Traverse City, Mich.

Dr. Chuinard is an orthopedic surgeon in Traverse City, Michigan. He received his medical degree from Louisiana State University, New Orleans. He completed his residency training at the University of Missouri-Kansas City, followed by a Fellowship in Shoulder and Sports Medicine with Professor Pascal Boileau, in Nice, France.


Dr. Jay Keener, MD

Surgeon Designer

Washington University

St. Louis, Mo.

Dr. Keener is Associate Professor and Chief of the Shoulder/Elbow Service, Orthopedic Surgery at Washington University in St. Louis, MO. He received his medical degree from West Virginia University School of Medicine, completed a residency in Orthopaedic surgery at the University of Iowa Hospitals and Clinics and a fellowship in Shoulder and Elbow Reconstruction at the Washington University School of Medicine in St. Louis Missouri.


Dr. Stephen B. Gunther, MD

Inventor, Founder

Sentara Healthcare

Charlottesville, Va.

Dr. Stephen Gunther is the founder of Shoulder Innovations, LLC. He received his medical degree from Dartmouth Medical School and pursued residency training at the George Washington University Hospital. He completed a fellowship in Shoulder surgery at the Prince of Wales Hospital in Sydney, Australia, and he was a faculty member at UCSF-Stanford as Chief of the UCSF Shoulder Service. He lives in Charlottesville, Virginia and is affiliated with the Sentara Health System.


Dr. Peter Johnston, MD

Surgeon Designer

Southern Maryland Orthopedics

Leonardtown, Md.

Dr. Peter Johnston is an orthopedic surgeon in Leonardtown, Maryland. He received his Bachelors of Science degree in Neurosciences at the University of Michigan and MD from Wayne State University. Dr. Johnston completed his Orthopaedic internship at the Detroit Medical Center/Wayne State University School of Medicine, residency at University of North Carolina and spent a year as a fellow at the Rothman Institute at Thomas Jefferson University in Philadelphia, PA sub-specializing in shoulder and elbow surgery.


A management team with a deep experience in medical devices and orthopedic surgery.


Robert Ball

Executive Chairman

Ball has spent more than a decade bringing medical device technologies to market, including proprietary orthopedic materials. He served at Tornier NV as Global Vice President, Research and Development, during which time Tornier grew from approximately $70M to $300M in annual revenues through organic growth of new products. He holds more than 30 issued or pending patents.


Matt Ahearn

President, COO

Ahearn is an entrepreneurial business leader with 15 years of experience building and managing dynamic technology companies. He has a proven track record of successfully bringing innovative products and services to market. Prior to Shoulder Innovations, he was COO of Conpoto, and VP of Finance, COO and President of LeanLogistics.


Don Running

Vice President, Research & Development

Running has worked 24 years in the orthopedic industry serving in various C-level and executive R&D, marketing and business development roles at Depuy-Synthes, Biomet, DVO, Genesis Innovation Group and others. Don co-founded DVO–Extremity Solutions LLC, which was sold to Tornier, Inc. in 2007. He holds 13 issued and pending patents.


John O’Keefe

Engineering Manager

O’Keefe started with SI in 2015 and was instrumental in the launch of its new arthroplasty product. He recently served as Program Manager for American Eagle Instruments where he led to successfully facilitate a $4M U.S. TATRC research program aimed at the orthopedic market.


Marc Vosler

Director, Sales and Marketing

Vosler most recently served as the Director, OrthoElite Sales Education at Biomet orthopedics. Previously, he held positions as Directors of Marketing at Biomet and DePuy (a Johnson & Johnson company). Vosler holds a BS in Marketing from Central Michigan University and an MBA from Indiana Wesleyan University.