Office & Administration Team

Sarah Halfacre, Executive Director, MSOT, OTR/L, ATRIC 

Sarah Halfacre, MSOT, OTR/L, ATRIC, joined Green Hill Therapy’s staff in February of 2017 and has since completed her American Hippotherapy Level 1 and Level 2 training. She provides hippotherapy at Green Hill and aquatherapy at the Home of the Innocents. In September of 2017, Sarah received her certification for aquatherapy from the Aquatic Therapy and Rehab Institute. In August of 2019, Sarah Halfacre became board certified in hippotherapy by the American Hippotherapy Certification Board. She is one of only 130 therapists in the world to hold this distinction.

Previously serving as the Clinical Manager, Sarah became the Executive Director of Green Hill Therapy in February of 2020. 

Sarah has experience in both adult and pediatric populations with concentrations in mental health and physical rehabilitation settings. She provides educational presentations to a variety of audiences in order to increase awareness and understanding of therapy techniques to benefit differently-abled individuals. At Green Hill, Sarah uses a holistic approach, utilizing creative play activities, making use of the outdoor spaces at Green Hill to engage children in softball, landscape design, and even painting rocks to achieve functional outcomes and reach therapy goals. Sarah has had the pleasure to see dozens of athletes achieve many accomplishments during her 18 years of coaching Special Olympics sports. Sarah has two children and loves sports and living an active lifestyle.


Mark Roberts, Director of Development

Mark was first introduced to GHT through a friend and volunteer in 2017. He helped with a facility project and fell in love with the organization. “When you see the magic of Green Hill Therapy, it’s pretty hard not too.” He continued volunteering and eventually served on the GHT Board of Directors. In February 2020 he officially joined the GHT staff as the Director of Development. 

Previously, Mark was the Founder and CEO of CityScoot, a designated driver solution in Louisville, KY from 2004 – 2018. 



Andrea Burton, Billing Specialist

Andrea joined the GHT team in May of 2020. She brings a wealth of knowledge and medical billing experience. (Bio coming soon.)


Therapist Team

Brittany Browning, OTR/L

Brittany Browning, OTR/L joined the Green Hill team in 2015 after earning her Masters of Science in Occupational Therapy from Spalding University in 2014. The uniqueness of Green Hill allows her to not only offer skilled occupational therapy services in a typical clinical setting, but also the chance to utilize equine movement and hippotherapy principles as well as the Home of the Innocents therapeutic pool to provide aquatic therapy. She has completed Level 1 and Level 2 training through the American Hippotherapy Association and has also completed a pediatric aquatics course through Aquatics University.

Whether it’s in the clinic, the barn, or the pool, Brittany enjoys utilizing client-centered treatment principles to help children of all ages and diagnoses reach their full potential. She enjoys collaborating with the children, parents, therapists, office and equine staff that make up our Green Hill family to impact our community in a positive way.

In addition to pediatric experience, Brittany has also had the pleasure of working with adults in long and short term rehab facilities. When she is not at work, she enjoys spending time with her daughter, Caroline, husband, Craig, family, and friends. She also enjoys spending time with her English bulldog, Lucy.

Jane Harper, OTR/L

Jane Harper, OTR/L, B.A., M.A, B.S. has over thirty years experience as an occupational therapist with over twenty-five years specializing in pediatrics. She joined Green Hill Therapy in 2007 after ten years in the First Steps program. She has certification in Level 1 Hippotherapy and Pediatric Certification from the Aquatic Therapy and Rehabilitation Institute. Professional continuing education includes Therapeutic Listening, pediatric kinesiotaping, reflex integration to improve sensory processing, pediatric neuro-development treatment, and the use of assistive technology. Jane uses her creativity to make challenging activities fun and engaging, making Green Hill’s proven playful approach a perfect employment fit.

Jane shares her home with her husband and 10 cats. She is a long-time volunteer with Alley Cat Advocates and provides in-home medical rehabilitation to injured and sick felines (that’s how she got 10).

Sara Johnson, OTR/L

Sara Johnson, OTR/L graduated from Spalding University in 2008 with a Masters of Science in Occupational Therapy. Sara completed her Level II fieldwork rotation at Green Hill. She started working at Green Hill Therapy after graduating. She has completed American Hippotherapy Association Level 1 and Level 2 training. Other continuing education has focused on ‘Autism Meltdowns in Children and Adolescents’, and ‘Social Skills for Children with Autism Spectrum Disorder’. Sara is CPR and First Aid certified for adults and children.

Sara loves working with her kids at Green Hill and watching them grow and become more independent every day. Her treatment style is a client-centered approach, and often incorporates parents and caregivers in the session. Sara believes this approach empowers and motivates the client in the therapeutic process and provides for the best carryover at home.

In her free time, Sara enjoys baking, reading and spending time with her husband, David, and daughters, Madalyn and Olivia.

Karla Powrie, PT

Karla Powrie, PT graduated from The Ohio State University with a BS in Physical Therapy in 1994. Since then, Karla has had experience in an acute care hospital, orthopedics and sub-acute rehabilitation. She has worked at Green Hill since June 2014 and has completed both Level 1 and Level 2 certifications from the American Hippotherapy Association.

Karla’s clinical interests include using neurodevelopmental treatment techniques (NDT) for treating patients with neuromuscular disorders. She loves her 3 and 4 yr old patients but appreciates treating adolescents and teenagers too.

“There’s nothing else like working at Green Hill Therapy. Where else can you go to work and hear horses whinny and have barn smells?  We also have an awesome staff that collaborates well as a team!”

Karla is married to her husband Bob who is also a physical therapist.  They have two grown children Maria and Luke. Karla likes outdoor activities like hiking and kayaking. She has a retired racing greyound named Elmo.

Susanna Diller, COTA/L

Susanna Diller worked in many roles at Green Hill including volunteer, equine/staff team member, interim equine manager then field work student before joining as an Occupational Therapy Assistant in August of 2018.

Susanna’s clinical interests are in mental health, trauma and healing informed care, emotional and self-regulation, sensory integration, occupational justice and utilizing hippotherapy and aquatic therapy in treatment.  Susanna also has an extensive background in riding and working with horses, with a special interest and love of dressage and classical training.  She loves to use the horse as a partner and tool in therapy, whether on the ground or astride, to improve patients’ confidence, self esteem, and overall well-being in order to work towards and achieve their individualized goals.

“I love the creative liberty I am able to take with each session at Green Hill!  The dynamic and progressive tools we have such as the horses and water, with the ability to work in the clinic, outdoors, arena, or at the Home of the Innocents therapy pool provides endless possibilities and opportunities for creative, meaningful, and individualized treatment, accelerating my patients’ progress and keeping sessions fun and engaging!”

Susanna lives with her fiancee, Blair as well as her dog, Azalea, and three cats, Rutabaga, Sandy Boy, and Dimple.  In her spare time, I love attending live music shows, hiking with Blair and Azalea, bird watching, reading, gardening, cooking, and baking.

Olivia Hughes, OTR/L

Olivia Hughes, OTR/L is a new graduate of the Auerbach School of Occupational Therapy at Spalding University. She completed her Level II fieldwork rotation at Green Hill Therapy in 2018, and began working at Green Hill shortly after graduating in 2019. Green Hill Therapy provides Olivia with the opportunity to provide unique, client-centered care to families and children of all ages and diagnoses, while also facilitating an in-depth learning experience of no compare. Interested in emotional regulation, pediatric development, and sensory integration, Olivia utilizes hippotherapy and aquatic therapy to implement these principles with skill and fun. 

“I said it as a student and I will say it again now, Green Hill is my dream job. Aside from the amazing team members, families, and volunteers who keep this place running, I love Green Hill because it allows one to expand their perception of what physical and occupational therapy can be. We are providing a service that switches things up and keeps it exciting and fun for our kiddos. Through Green Hill we are helping families and children reach their greatest potentials and live life to the fullest!” 

Olivia recently became Mrs. Hughes, marrying her best friend, Dylan! They are currently house shopping and hoping to plant long lasting roots in the Louisville community. In her spare time, Olivia enjoys spending time with family and friends, cooking, watching movies, and going on long walks with her dog, Nala.

Whitney Veatch, OTR/L

Whitney graduated from Spalding University with her BS in Health Science in 2018 and her MS in Occupational Therapy in 2019. She completed her level 2 fieldwork rotation at Green Hill during the summer of 2018. Her clinical interests include Down syndrome, autism, sensory integration and the use of both hippo and aqua therapy to promote independence and improve quality of life among pediatric patients.

In her free time she enjoys adventuring with her fiancé, Trevor, taking care of farm animals, spending time with family, walking her dogs, and caring for her beloved cat of 20+ years, Rosie.