Our Staff

Barbara Wertheimer

Executive Director

Barbara Wertheimer is a retired attorney who first came to Pegasus in 1991 when her daughter began riding in the program. Over the years she became an active volunteer in many facets of the organization, ultimately becoming President of the Board of Directors in 1997. She continued in that role until April 2007, when she assumed the position of Executive Director following the passing of the founder and former Executive Director of the program, Carol Tatum. Barbara and her family have embraced Pegasus and all that the program has done for countless individuals. She is thoroughly committed to its continued existence as the premier therapeutic riding program in Philadelphia.  

To contact Barbara, please email her: Pegasus5@Comcast.net

Teresa Doherty

Program Director

Teresa Doherty is the epitome of homegrown talent. She first came to Pegasus as a volunteer with no knowledge about horses or people with disabilities. She was quickly hooked and became a reliable and capable volunteer. After working as a staff member for the Summer Program, Teresa became the Assistant Summer Program Director which she now serves as the Director. Teresa graduated from Rocky Mountain College with degrees in equine science and psychology.  She also holds a PATH therapeutic riding instructor certification as well as PATH certification for Equine Specialist in Mental Health and Learning. 

To contact Teresa please email her:  PegasusTeresa@comcast.net

Lynn Green

Assistant Program Director and Volunteer Coordinator

Lynn comes to Pegasus through a diverse background of counseling and therapeutic riding program experiences. A graduate of Rocky Mountain College with dual degrees in psychology and equestrian studies, she also holds a Masters Degree in social work from West Chester University with a graduate certificate in Nonprofit Administration. She is a PATH Registered Instructor and she also holds her PATH certification for Equine Specialist in Mental Health and Learning. With a passion for travel and a certification in logging (yes, chainsaw level 1 and 2), Lynn is a great additional to our Pegasus team!

To contact Lynn, please email her: PegasusLynn@Comcast.net

Hannah Fitch

Assistant Instructor

Hannah has been riding and training horses almost her entire life as she grew up on a farm. She has a diverse riding background that includes western pleasure, roping, penning, barrels, hunters and equitation. A graduate of Temple University, she holds her degree in Criminal Justice and Psychology.  Hannah was also a volunteer firefighter and has a vast amount of experience working with youth at horseback riding camps.

Haley Flagg


Haley joins our Pegasus staff with a diverse equestrian background. She has grown up riding and showing in the New York state show circuit and spent time as a Vet Assistant. She has gained expertise working with horses in all capacities as an Equine Assistant at a top ranked show barn for over 6 years. A graduate of Drew University she was captain of her Inter-Collegiate Equestrian team and holds her degree in Environmental Science. Haley’s enthusiasm for horses and the interest she takes in her riders is evident to all that meet her.  Haley holds a PATH therapeutic riding instructor certification.

To contact Haley, please email her: PegasusHaley@Comcast.net

Alexandra Manwarren

Instructor, Social Media Director and Community Outreach Coordinator

Alexandra Manwarren, or “Alex,” enjoys riding and competing in shows. She has vast experience teaching in both therapeutic as well as traditional riding programs.  A former director for the YMCA, Alex has experience overseeing youth programs, camps, and counseling.  Alex assists Pegasus with our website and managing our social media profiles. She is present at most community outreach events and classroom engagements on behalf of Pegasus. A graduate of Sweet Briar College, she is an ANRC rated rider and is a PATH certified therapeutic riding instructor.

Ryan Frech

Assistant Instructor

Ryan joined Pegasus as a volunteer and quickly developed a passion for horses and our Pegasus community. A graduate of Archbishop, he will be attending Delaware Valley University to continue his education and further his equine studies. As a former Pegasus Volunteer of the Year, Ryan is invaluable to have in the barn, teach lessons, and help with our Pegasus programs.

Taylor Adams

Equine Trainer

Taylor Adams is an accomplished horsewoman who has been riding most of her life. She is a graduate of Delaware Valley College, where she was Captain on the Dressage Team. She is currently an instructor for able-bodied riders at Platinum Equestrian Academy in Perkasie, PA, and the Administrative Assistant of the Equestrian and Breeding Center at Delaware Valley College. Her work as our Equine Trainer has ensured that we have happy and safe horses.

Corey Woldenberg, DPT

Physical Therapist

Corey Woldenberg is a licensed physical therapist. Her experience volunteering with therapeutic riding programs first inspired her to enter the profession of physical therapy. She has served as a volunteer with therapeutic riding programs for 15 years across several states, and she is thrilled to share her skills with Pegasus. Looking ahead, she plans on pursuing her hippotherapy certification.

Elysia Rodriguez

Barn Assistant

Who is in every daily picture of the Pegasus volunteer appreciation week? Elysia! Even if it’s first thing in the morning and she’s been at Pegasus late the night before, we can count on Elysia to help with our horses, riders and programs. After her high school internship with Pegasus, she continued to stay on volunteering. A graduate of El Centro High School, Elysia is currently attending Community College of Philadelphia and pursuing a career in nursing.

Sarah Emery

Barn Assistant

With an amazing smile, a ‘can do’ attitude and a love for our Pegasus horses, Sarah has been a Pegasus volunteer for years and helps take amazing care of our ‘herd’. She is in school pursuing her education in veterinary studies and can be counted on to lend a hand whenever she is needed.

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