Our Practitioners

Deborah C. Wilde, MS, CPO, FAAOP
Owner & Practitioner

Deborah discovered prosthetics and orthotics during her graduate studies at the University of Illinois, when she was looking for a way to combine her interests in medicine, engineering and art. After earning a Bachelor’s degree in biology and then a Master’s Degree in Biomechanics from the University of Illinois at Urbana/Champagne, she completed her post-graduate studies in prosthetics and orthotics at Northwestern University. After a residency in orthotics, specializing in pediatrics, at Indiana University/Purdue University at Indianapolis in 1983 she began practicing orthotics and prosthetics at Eastern Maine Medical Center in Bangor, Maine.

Having a passion for working with children and helping them live (and play) to their fullest potential, Deborah moved to California in 1988 to become the first Chief of Orthotics and Prosthetics at the Lucile Salter Packard Children’s Hospital at Stanford in Palo Alto. There Deborah worked on redesigning ankle foot orthoses (AFOs) to make them more user-friendly for families. After almost eight years at the Children’s Hospital, Deborah married and moved to the north bay area of San Francisco. She worked for another eight years at a private practice in Santa Rosa before convincing her husband that life in New England would be so much better, especially for their young son.

After falling in love with the Burlington area on a vacation, the family moved to Vermont in 2004 and Deborah began working at Bio-Medic Appliances, Inc. When the founders, Dan and Sue Hebert, decided to retire and move to North Carolina, Deborah bought the small private practice from them in January 2007. In the first four years under her leadership, the company has doubled in both staff size and patient population.  The company continues to grow under her leadership today.

Deborah lives in Richmond, Vermont, with her husband, son and a variety of four-legged animals, including their Cavalier King Charles Spaniel, Cody. When she can tear herself away from the office, Deborah enjoys hiking, snowshoeing, cooking, reading and painting landscapes.

Sarah Thomas, BS, CPO
Owner & Practitioner

Sarah Thomas joined Bio-Medic Appliances, Inc. in 2010 as a prosthetist/orthotist.  In January 2013, Sarah became a shareholder in the company.  Sarah is ABC-Certified in prosthetics and orthotics and specializes in prosthetics as well as cranial remolding orthoses for infants.  After earning a Bachelor’s degree in Comprehensive Sciences from Villanova University,  she completed her post-graduate studies in prosthetics and orthotics at The Newington Certificate Program in Prosthetics and Orthotics in Newington, Connecticut, affiliated with The University of Connecticut at the time.

Sarah found her calling for orthotics and prosthetics at a young age. As a child, Sarah had a foster brother who was born with a leg deformity that resulted in an amputation at the ankle. Throughout her childhood, Sarah recognized her brother’s limitations as he struggled to run, jump, or do cartwheels, but mostly she remembered how he often broke the prosthetic foot off of his prosthesis . With her love for science and art, and the desire to “fix” her brother’s ever breaking prosthesis, Sarah made it her goal to become a prosthetist/orthotist while a sophomore in high school.

Sarah fell in love with Vermont while snowboarding at Vermonts various ski resorts.  In 2010, Sarah and her husband moved up to Vermont from Boston, MA where she served as Manager for a branch office of a nation-wide orthotic and prosthetic company.   Sarah has been practicing as a prosthetist/orthotist since 2000.

Sarah lives in Morrisville, Vermont with her husband Todd and their “kids” Oscar and Tessie, a grouchy pug and a Chihuahua. In her spare time Sarah snowboards with her husband, plays softball, teaches and creates stained glass, volunteers on the Morrisville Food Co-op Board of Directors and travels as often as possible.

Mark Greenstein, BS, CO


Mark Greenstein is an ABC Certified Orthotist who joined Bio-Medic Appliances Inc. in 2015.  He earned his Bachelors in Science from Johnson and Wales University in 1997.  Mark started his orthotic career as a technician in 1999, and gained experience in fabricating custom orthotics.  He then completed his post-graduate studies in orthotics at Century College in 2007.  Mark did his residency at National Orthotics and Prosthetics Company in New Jersey with an emphasis on pediatric orthotics.  He has worked with patients at Children's Specialized Hospital of New Jersey and Texas Children's hospital in Houston where he gained valuable experience in working with children with various physical impairments.

Mark relocated to Vermont in 2015 from Texas.  He was drawn to the area for its kayaking, skiing, fishing and way of life.  He currently resides in Shelburne.