Our Team
Meet the Minds Behind Our Mission
Joshua Kaplan
CEO and Founder
Doctor of Physical Therapy
Josh graduated from Boston University’s athletic training and physical therapy program back in 2016, and started his career at an outpatient clinic in San Francisco. Over the following 6 years he worked in a range of physical therapy settings including acute rehab, outpatient, and skilled nursing on both the east and west coasts with a few stops in Colorado. No matter where he found himself, he always enjoyed his work as a physical therapist. As covid emerged in 2020 Josh found himself in Western Massachusetts in a nursing home setting. Different emerging trends in healthcare led to the founding of EnPhysion Health in February of 2021 and since then he has focused intently on creating a high quality membership experience that transforms the lives of EnPhysion’s clients. In his free time he enjoys family time, skiing, enlightening conversation, traveling, and spending time with friends.
Kate O’Sullivan
EnPhysion Trainer
Kate joined Enphysion in 2022 after 10 years working in a gym setting and 5 years working in both outpatient and home care physical therapy. Kate was drawn to Enphysion’s philosophy believing wholeheartedly that movement is medicine and daily movement is imperative to living a fulfilled, healthy life! When Kate is not seeing clients, she loves spending time with her three dogs and working out in her home gym!
Maggie Ahearn
EnPhysion Trainer
Physical Therapist
Maggie earned her undergraduate degree in Exercise Science from the University of New Hampshire, where she also played basketball. She then went on to earn her Doctorate of Physical Therapy from Rocky Mountain University of Health Professions. She has spent the past three years practicing in an outpatient orthopedic setting, treating patients across a wide range of ages and orthopedic conditions. Maggie believes everyone should feel confident in their bodies, finding movement that is enjoyable. Outside of work, she enjoys spending time with family, exploring the outdoors with her dog, and spending as much time as possible finding sea glass on the beach.
Rebecca Diamantopoulos
EnPhysion Trainer
Becca earned her Bachelor of Science in Exercise Physiology from UMass Lowell before completing her Physical Therapist Assistant degree at Bay State College. With over eight years of experience in outpatient orthopedic physical therapy, she joined the EnPhysion team in 2025. Becca is passionate about promoting “exercise as medicine” and thrives on helping patients of all ages and ability levels return to the activities they love. She was drawn to EnPhysion’s mission to effectively bridge the gap between rehabilitation and lifelong fitness. Outside of the clinic, Becca enjoys snowboarding, visiting family, and spending time outdoors with her husband and son.
Susan Dias
EnPhysion Trainer
Sue has been a lifelong fitness enthusiast and a certified personal trainer since 2009. With a Bachelor of Science and an Associate Degree in Allied Health, she returned to college to become a Physical Therapist Assistant and has worked in outpatient orthopedic rehabilitation since 2015. A perpetual student, Sue is passionate about sharing her knowledge and experience to help others achieve their functional fitness goals. Her fitness philosophy is simple: “Motion is the lotion, and small steps lead to big results.” When she’s not working, you’ll find her enjoying the outdoors, traveling, and always looking for the next adventure!