Our Veterinarians


Dr. Jennifer Schneider, Medical Director

Dr. Schneider holds an undergraduate degree in animal science and pathobiology from the University of Connecticut and is a graduate of the University of Pennsylvania School of Veterinary Medicine. Dr. Schneider worked for several years at a small animal and equine practice in New Jersey prior to moving to this area and joining Clocktower in 1999. Dr. Schneider’s professional interests include Lyme disease, radiology, preventive medicine, and protecting the human-animal bond. She resides in Herndon with her husband and three children.


Dr. William Mazur

Dr. Mazur obtained his BS in Marketing/Business from George Mason University. After graduating, he became a professional touring musician with the DC based rock band, SEV. After parting ways with them (5 years later), he started his veterinary career by attending the VA-MD Regional College of Veterinary Medicine. After graduating, Dr. Mazur continued his professional training and completed a rotating internship at the Angell Animal Medical Center in Boston, MA. He was an emergency/critical care veterinarian for the next several years before moving back down to the Washington DC area to be closer to his immediate family.


Dr. Megan Gibson

Dr. Gibson received her undergraduate degree in biology from the University of Richmond and her veterinary degree from the University of Tennessee in Knoxville. Following graduation, she obtained additional training through general rotating, internal medicine, and ophthalmology internships. Her professional interests include ophthalmology, internal medicine and radiology/ultrasound. Dr. Gibson lives in Centreville with her husband and two dogs.


Dr. Leslie Moore

Dr. Moore is a graduate of the College of Veterinary Medicine at The Ohio State University and earned an undergraduate degree in zoology from Auburn University. She was affiliated for eleven years with Wheaton Animal Hospital in Kensington, Maryland, before joining the Clocktower team in 1998. Dr. Moore and her husband, David Brown, live in Vienna with their three children.


Dr. Virginia Vincent

Dr. Vincent earned her veterinary degree from Texas A&M University in 2008. She practiced in the northern Virginia area for 5 years before joining the Clocktower team. Her special interests include dentistry, feline medicine, and diabetes management. Between earning her bachelor’s degree in biology from Princeton University in 2002 and attending veterinary school, Dr. Vincent traveled to Kenya to conduct wildlife research and worked as a veterinary technician in general and emergency practice. Dr. Vincent lives in Arlington with her husband and son. She shares her home with an orange tabby cat and a border collie mix.


Dr. Paul Gallagher

A native of Reston, Dr. Gallagher obtained his undergraduate degree from the University of Virginia. Prior to veterinary school, he pursued a scientific career investigating the pathology of snake envenomation and novel therapies for schizophrenia. In 2009 he graduated with his doctorate from the Va-Md Regional College of Veterinary Medicine. Dr. Gallagher worked for a number of years in the Roanoke and Blacksburg areas before joining Clocktower Animal Hospital in 2018. His home has been a refuge for a multitude of dogs, cats and birds over the years and when not working Dr. Gallagher enjoys spending time outdoors with his wife and their six wonderful children.