Volunteers & Staff

Volunteers are the backbone of Unicorn and one of the many reasons for our success. It is through their loyal dedication that we are able to offer the wonderful benefits of therapeutic riding and equine activities to our community. We need program volunteers, barn volunteers, administrative volunteers, fundraising and special event volunteers. Volunteers have an enormous impact on the health and well-being of communities worldwide. Come join us and make a difference!

Download our volunteer forms:

Unicorn_Volunteer_Authorization for EMT (Word)

Unicorn_Volunteer_Authorization for EMT (PDF)

Unicorn_Volunteer_Information Form (Word)

Unicorn_Volunteer_Information Form (PDF}

All of our instructors are Path International Certified Therapeutic Riding Instructors (CTRI).

Diana Sheehan

Diana Sheehan (Instructor) grew up in Massachusetts in a horse-centric family: her father was an equine veterinarian and her mother a rider and judge. She rode pony hunters and evented until she went off to Smith College, where she received a degree in Theatre.

After a 35-year career as an actor, she realized she missed being around horses. Diana served as a volunteer for Equest Therapeutic Riding in Dallas for four years, until relocating to Princeton in 2022, when she joined the barn at Unicorn as an instructor. She is the mother of two grown children and has been married to her wonderful husband Ethan for 30 years.

Lynn Zahn

Lynn’s involvement with therapeutic riding started 14 years ago when she heard about a local program in need of volunteers. Excited by the idea that she could combine her love of horses and passion for helping others, Lynn began volunteering and hasn’t stopped since!  A PATH International Certified Registered Instructor (CPR & First Aid Certified), Lynn joined Unicorn Therapeutic Riding Center in 2017. Her happiest moments are when she sees riders of all ability connect with these amazing animals and experience new levels of personal growth and life satisfaction while having fun.

Lynn’s passion for horses started when she was a young girl who, on Christmas morning, received her first pony, Teddy.  She grew up riding competitively and, after a hiatus to work and care for her family, is thrilled to find herself back in the saddle and is preparing to begin competing soon. Her goal is to continue her education in the equine-assisted therapy field and share the healing power of horses with others.

Therapeutic riding has given Lynn the opportunity to fuse her love for horses, education, and children into a program that will allow her to give back to her community. A graduate of Villanova University, Lynn has worked the last 18 years of her professional life focused on independent school education where she is committed to educating, guiding, and supporting families in choosing the best path for their child’s future.

Lynn resides in Hunterdon County, NJ, and is the proud mother of three amazing daughters! In her free time, she enjoys horseback riding, gardening, hiking, kayaking, traveling, cooking, and spending time with family and friends.

Sara Cohen

Sara first came to Unicorn in 2019 as an occupational therapy fieldwork student from Thomas Jefferson University, where she received her master’s degree in occupational therapy in May 2020.

Sara started riding as a child at George School Equestrian Center, where she competed in the hunters and equitation through high school and college. She began teaching beginner riding lessons as a teenager and quickly discovered how rewarding it was to use her knowledge to help others achieve their goals both on and off the horse. Unicorn provides the unique opportunity to use an occupational therapy lens in the barn and incorporate her lifelong love of horses in her career as occupational therapist. Sara went on to become a Certified Therapeutic Riding Instructor through the Professional Association of Therapeutic Horsemanship Intl. in 2021, which has allowed her to further her knowledge in the area and connect with others working in the field.

Sara enjoys spending her free time with her own two horses— Q, who is an OTTB she adopted from South Jersey Thoroughbred Rescue, and Oliver, who she took home for a well-deserved retirement after many years of loving him as a favorite lesson horse and trusty show mount.