Our Amazing Professionals


As a charitable non-profit organization, Equi-librium is governed by a 20-member, all-volunteer Board of Directors, and managed by a professional staff of 18 paid employees, of whom 2 are full-time. The staff is assisted by over 200 active volunteers who support the daily operations of the program. As a Premier Accredited Center of PATH International, our instructors are Certified in Equine Assisted Activities and the therapists are Registered with both PATH International and the American Hippotherapy Association.


Administrative Staff

Cheryl Baker, CEO: cheryl@equi-librium.org

Tanya Tremblay, Administrative Assistant: admin@equi-librium.org

Yvonne Darlington, Volunteer Coordinator: volunteercoordinator@equi-librium.org

Dave Smith, Facilities and Maintenance Manager: dave@equi-librium.org

Christi Doyle, Equine Operations Manager: christi@equi-librium.org


Yvonne Darlington, PATH-certified Instructor

Yvonne Darlington has been a PATH certified instructor with Equi-librium ( or its predecessors) for 20 years. Born and raised in the Netherlands (yes, she wore wooden shoes when she was little) where she got a bachelors in Youth Welfare Work and a bachelors and masters in Developmental Psychology. She has been doing this wonderful work for 20 years now. It combines her love for children and horses, her love for teaching and learning and physical activity and the outdoors. Lately she has been focusing on being the Volunteer Coordinator at Equi-librium and making that part of the operation work smoothly. Also the proud mom of two college girls and “mom” to a dog and a cat.  


Danielle Drosnock, PATH-certified Instructor

Danielle began instructing riding in 2013, and has been with Equi-librium since 2017. She started out as barn staff, moved to volunteering, and became PATH-certified in August 2017. Danielle has been around horses all her life. She has catch ridden and trained horses for about 10 years. She has shown successfully through First Level Dressage and Novice Combined Training through ESDCTA (Eastern States Dressage & Combined Training Association), also competing through Level 1 Jumpers at Bucks County Horse Park. She received a Bronze Medal from ESDCTA in 2008 and in 2009 a Rider Performance Award in Training Level from USDF (United States Dressage Federation). Danielle enjoys riding her horse, Chloe, bridleless at home; they have even won show jumping competitions together bridleless. She shares horses at home with her mother, who inspired her passion for teaching. Danielle will graduate Moravian College this May with a BA in Environmental Policy and Economics. She is looking to pursue a MA in Counseling Psychology and become a PATH-certified ESMHL(Equine Specialist in Mental Health and Learning). 


Christi Doyle, PATH-certified Instructor

Christi was born and raised in Oregon where her father managed a boarding stable in a small farming community. It was there that her love for horses began. She loved to hop on her horse bareback and ride through the forests and fields until the sun went down. When she was young she participated in 4-H and local rodeos. Christi has an educational background in Recreational Therapy and is fluent in ASL. She began volunteering at Equi-librium in 2010 and started working as an instructor in 2011. She loves sharing her love of horses with individuals with special needs. She is devoted to her faith and family. She is married, has four children, two dogs and a horse named Maggie. She currently lives in Nazareth.


Brigita McKelvie, Instructor in Training

Brigita has extensive horse knowledge with over 40 years experience.  She has owned her own horse farm, trained her own horses (one made it to U.S. Pony Club Nationals two years in a row in Show Jumping), taught beginners to ride, judged low level horse shows, and trained with some of the best Grand Prix riders. Brigita has also volunteered at many local horse events and organizations, such as a leader of a 4H horse club (over 25 years), 10 years as District Commissioner of a local chapter of U.S. Pony Club organization, volunteered with Cort Center at Pleasant Hollow Farm, etc.  She is also a member of Pennsylvania Horse Council and U.S. Equestrian Team Foundation. Brigita is married, has 2 grown children and 2 granddaughters who are following in her footsteps, works full time as a REALTOR specializing in horse properties, and is currently training an Off-The-Track Thoroughbred mare.    


John Murdoch, PATH-certified Driving Instructor

John has been a volunteer with Equi-librium, and our predecessor organization, since the early 1990s; he has been heavily involved with our therapeutic driving program since its beginning in 2006. John became a PATH-certified driving instructor in 2015. John is married, with three daughters; the youngest, Annie, is one of our driving students, as well as a volunteer barn worker. He and Annie are the owners of Skyz The Limit (Skye), a key part of our equine staff. 

John has been a 4-H leader, president of the Northampton County 4-H Center Board, and a regional safety official in the U.S. Eventing Association. In 2017 John was elected to the PATH International Credentialing Council, the board that creates and manages PATH certifications and credentials for PATH's professional membership, as well as accreditation standards for PATH member facilities.



Renee Vaughn, PATH-certified Instructor

Renee joined Equi-librium in 2014. She became involved with therapeutic riding as a volunteer at Special Equestrians in 1987. Renee entered Temple University in 1997 to study Therapeutic Recreation. While in school, Renee taught therapeutic riding, as well as volunteer lessons. Upon graduation, Renee worked full time at Special Equestrians as an Instructor and Assistant Barn Manager. Renee became PA Council Phase I and II certified in 2002. She also began teaching at Ivy Hill Equestrian and was the volunteer coordinator. During this time, she became a PATH-Certified Instructor. Renee began volunteering with Special Olympics through Special Equestrians and became a certified Coach in 2000. She has taken many riders to the PA State Special Olympic Summer Games at State College. She has also volunteered with Paralympic Equestrian and the Special Olympic swimming program. Renee has attended two Special Olympic World Games as a spectator and volunteer.  Renee lives with her husband,      Doug, and son, Nate in Walnutport. In her free time, Renee likes to spend time with her      family, riding her horse, water skiing and exercising.                      


Samantha Hartzell, PATH-certified Instructor

Devin Munoz, Instructor in Training

Board of Directors

Mark Culp, Chairperson; Director of Facilities and Campus Safety, Northampton Community College

Wenda Boyer, Vice Chairperson; Owner/Artist, Braided Love

Andrew Null, Treasurer; Staff Accountant, Buckno Lisicky & Company

Christina (Chrissy) Speller Kluhs, Secretary; Procurement and Raw Materials Manager, Just Born

Alice Balsone; Retired, Global Engineering Systems and Solutions Manager, Air Products & Chemicals

Stephen Bowers; Vice President, Commercial Real Estate, Penn Community Bank

Jennifer Cona; Scheduling Coordinator, Veritext

Tom Daub; President, Brown Daub Inc.

Andrew Duckworth; Associate, Mosebach, Funt, Dayton & Duckworth, P.C.

Nancy Ehle; Community Volunteer

Liza Green, MD; Pediatric PMR Physician, Lehigh Valley Health Network

Mark D. Hartney; Community and Economic Development Administrator, Northampton County Economic Development

Kimberly Hirschman; Community Volunteer

Jennifer Kilareski; Community Volunteer

Margaret (Maggie) Murphy, Executive Director, NAMI

Casey Noble; Self-Employed

Tiffany Smith; District Manager, Walgreens

Susan Weber Knowles; AVP, Regional Underwriting Manager, National Equine Specialist, AIG

David Wolfson; Co-Owner, Go Astro Travel