"Stonewall Veterinary Clinic was founded by two veterinary professionals; a career veterinarian and a licensed veterinary technician both dedicated to providing top-quality pet care services"

Practice Founders

Dr. Lauri Fauss, DVM

Dr. Fauss graduated from the Virginia-Maryland Regional College of Veterinary Medicine in May of 1992. Previously she earned a MS in Environmental Biology/Natural Ecosystem Management and she worked for 2 years helping to build the Hazardous Substances Data Bank for the National Library of Medicine.

She started her veterinary career in equine anesthesia and moved to small animal (pets). She enjoys the fast-paced hospital setting and has specific interest in geriatric medicine, wellness care, laser treatment and surgery.


She and her family have lived near Haymarket since 1993. Their "zoo" currently consists of three dogs, two cats, three horses, one llama and various fish.

Cheryl Collins (August 3, 1958 – October 1, 2017)

Cheryl opened Stonewall Veterinary Clinic with her business partner, Dr. Lauri Fauss. Cheryl managed the operations of the clinic and continued to exercise her LVT skills part-time.

She was the smiling face of the clinic, always organizing and cleaning. She loved being around people and everyone could feel that. Cheryl always strove to do her very best, to live life to the fullest.

Cheryl enjoyed spending time with her children and five grandsons. She also enjoyed spending time with friends and could typically be found at the many vineyards around Loudoun or competitively playing recreational sports.

"Stonewall Veterinary Clinic is privileged to have a very talented and dedicated group of people on staff."

Associate Veterinarians

Elaine Kelly, DVM
Dr. Kelly, a 2004 graduate of the Virginia-Maryland Regional College of Veterinary Medicine, joined the practice in 2006.

She and her husband are natives of Northern Virginia and live in McLean, VA. They share their home with their dogs Koki and Stella, 3 cats and a guinea pig.

Dr. Kelly’s interests include small animal medicine, surgery, behavior and geriatric medicine. She joined the practice in 2006.


Olivia Schlichting, DVM
“Dr. Liv” graduated from the New York State College of Veterinary Medicine in 1990. She worked her way through veterinary school as a professional paramedic, then practiced small animal emergency medicine for 18 years.

In her free time, Dr. Liv and her husband enjoy horses, sci-fi shows and outdoor activities.


Dr. Liv has a special interest in prevention and treatment of tick borne infections, natural methods of supporting wellness and embraces the “One Health” concept that unites animal and human health. She joined the practice in 2008.


Sandra Nostrandt, DVM
Dr. Nostrandt graduated from the Virginia-Maryland Regional College of Veterinary Medicine in 1992. She is a native of Virginia.

She resides in western Loudoun County with her black lab named Danny. For enjoyment outside of the workplace her hobbies include hiking, biking, movies, gardening and playing with Danny. She joined the practice in 2015.



Lynne Thibodeau, DVM
Dr. Thibodeau grew up in Northern Virginia. She practiced as a licensed veterinary technician after graduating from Northern Virginia Community College in 1983. Prior to attending veterinary school, she was the head Licensed Veterinary Technician at the Emergency Clinic of Northern Virginia She graduated from the Virginia-Maryland Regional College of Veterinary Medicine in 1992. After graduation she practiced small animal medicine and taught Parasitology in the Veterinary Technician program at Northern Virginia Community College. Her husband's job took the family to Tennessee and Georgia where she continued to practice small animal medicine.

She and her husband live in Centreville with their 4 children, 3 cats (Toby, Martini, and Pickle), and 1 dog (Trixie). In her spare time you can find her at one of her children's sporting events. Dr. Thibodeau has a special interest in geriatric and internal medicine. They relocated back to Virginia in 2000 and she joined the practice in 2016.


Jansel Perez Martinez, DVM
Dr. Jansel Perez Martinez was born in Cuba and raised in Puerto Rico. Dr. Perez completed his Bachelor’s degree in Biology with minors in environmental science, animal behavior and ecology research. His doctorate degree was earned at Ross University School of Veterinary Medicine on the small, beautiful island of St. Kitts and Nevis located in the Caribbean. His clinical year was completed at Oklahoma State University with concentrations in gross and microscopic pathology.

Dr. Perez’s fields of interest are soft tissue surgery, tissue reconstruction and wound healing.
He is a strong believer in preventive medicine and client/owner education to achieve longer, healthier lives for his patients.

In his free time, Dr. Perez enjoys traveling the world as an amateur photographer. He also enjoys physical and mental training, agriculture, road trips, hiking, scuba diving, climbing, beach volleyball and baseball. He joined the practice in 2018.


Licensed Veterinary Technicians

Margaret Fasceski, LVT

Margaret received her degree in Veterinary Technology from Northern Virginia Community College in 2001. She started working with small animals in 1993. She grew up and resides in Northern Virginia.

Prior to her Veterinary Technology degree she received a B.S. in Biology from George Mason University. Margaret's interests include dentistry and radiology.



Rosemarie Crawford, LVT

Rosemarie received her degree in Veterinary Technology in 2012, but has been working at Stonewall Veterinary Clinic since 2006. Previously, she worked in animal shelters in IL and VA.  In addition to her work at the clinic, she frequently speaks at conferences across the country on kitten health and related topics.

Her interests include animal rescue, feline care, laboratory diagnostics, and anything kitten related.

Prior to earning her degree in Veterinary Technology, Rosemarie earned a BS and a BA from the University of IL, Urbana and a MA from the University of Central FL.


Allison Kelly, LVT
Allison earned her Veterinary Technology degree from San Juan College in 2017.  She has been working at Stonewall since 2013.  Prior to transitioning to veterinary medicine, Allison completed her BA in Classical & Near Eastern Archaeology at Byrn Mawr College and worked as a stable hand. 

Allison’s interests include clinical pathology and radiology.




Izabella Landry, LVT
Izabella earned her Veterinary Technology degree from Northern Virginia Community College in 2018.   She loves working in a vet clinic because she enjoys working with a team to provide great patient care.  In her free time she likes relaxing with her pitbull “Kona” and continuing her studies towards a B.S. in small business management. 


Izabella’s interests include radiology, pathology and animal behavior.




Kierianne Hansen, LVT
Kierianne has been in the veterinary field since 2010 when she started working as a veterinary assistant. She continued her education and graduated with a Veterinary Technology degree in 2014 from the Northern Virginia Community College.


She is passionate about all things feline, specifically kittens. She also works with the National Kitten Coalition as an instructor and helps manage their educational programs.


She lives with her growing family in Purcellville, Virginia



Technician Assistants

Brenda Thompson
Susan Rowan
Lindsey Colgan
Sage Rose
Chelsea Post



Customer Service Representatives

Jackie McIntosh
Cinthya Jimenez
Maegan DeForest
Eleasa Jones
Mari Yamada
Heather McIntosh


Office Manager

Becky TurnerBecky Turner