Meet Our Team - Chan Soon-Shiong Medical Center at Windber

Meet our team of experienced and caring pediatric therapists who are dedicated to early intervention services. They are a highly committed team whom work together to promote your child’s greatest potential and opportunity for growth.

Tonya McCool – Physical Therapist, Early Intervention Supervisor

Tonya McCool, PT, DPT, PCS is a full-time, licensed physical therapist, board certified pediatric specialist, and Early Intervention supervisor who received her Doctorate of Physical Therapy from Chatham University and previously received her bachelor’s degree in health science from Mount Aloysius College. She joined the team in 2017 with a return back to Windber which was her home town. With a passion for helping children thrive from the early start, she pursued her passion to open early intervention services through Chan Soon-Shiong Medical Center at Windber to offer children residing in Cambria, Somerset, and Bedford county services in their natural/home environments. Her areas of practice focus include early intervention treating children 0-3 years old and in the outpatient clinic treating the pediatric population. When not at the clinic, you will often find Tonya spending time with family and friends, seeking out a local coffee shop, staying involved in the community, getting outdoors, and crafting.

Christa Diaz – Occupational Therapist

Christa is a full-time, licensed occupational therapist who joined the Chan Soon-Shiong Medical Center at Windber team in 2024. She graduated from Saint Francis University in 2023 with her masters degree in occupational therapy. Christa has experience working in in-patient rehab, school-based therapy, 0-3 early intervention, and outpatient pediatrics. Outside of working as an OT, Christa likes to spend time with friends and family and with her cats at home.

Carly Hajjar – Physical Therapist

Carly received a Doctorate of Physical Therapy from Saint Francis University in 2022 and is a full-time, licensed physical therapist. She joined the CSSMCW team in 2023 and specializes in Pediatric Physical Therapy and Early Intervention. Outside of physical therapy, Carly enjoys traveling, lake days, reading, and time spent with family, friends, and her two dogs.

Olivia King – Occupational Therapist

Olivia King, MOT, OTR/L is a full-time, licensed occupational therapist who received her Masters degree from Saint Francis University in 2021. She joined the Chan Soon-Shiong Medical Center at Windber team in 2025, bringing with her extensive acute care, neuro/stroke care, early intervention, and sensory integration experience. Olivia’s true passion is providing pediatric/early intervention occupational therapy services, and is often found to be unable to go a full day without singing at least 2 nursery rhymes (with hand motions included of course!). She loves to celebrate small achievements with her clients, and is always looking for new ways to educate and empower local families. When not at work, Olivia enjoys spending time with her husband, singing show-tunes, shopping, crafting, and snuggling with her two dogs.

Kristen Russo – Speech Therapist

Kristen is a full-time, licensed speech pathologist with more than 20 years of experience in early intervention speech therapy. Kristen received her Master’s degree from Bloomsburg University and undergraduate degree from Penn State. Working directly with families and watching young children learn new skills and how to better communicate is her passion. She feels blessed to be in a profession and setting that she truly loves. Her therapy interests lie in apraxia, hearing impairment, and cleft palate as well as overall communication development. Kristen finds every opportunity to enjoy the outdoors and travel. When not providing therapy services, she cherishes time spent with her two children, friends and family.

Hannah Grace Wirfel – Physical Therapist

Hannah Grace is a full-time, licensed physical therapist who joined the Chan Soon-Shiong Medical Center at Windber team in 2024. She remained close to home to receive both her Doctorate of Physical Therapy and her bachelor’s degree in health science at Saint Francis University. She has experience working in the outpatient orthopedic, pediatric, and early intervention settings. When Hannah Grace is not at work, she is likely to be spending time with her friends and family, playing a round of golf, watching a good movie, or enjoying the outdoors.