Meet Our Team

Burke Animal Clinic has been providing comprehensive and progressive veterinary care in Northern Virginia since 1979. We practice integrative medicine by offering traditional veterinary services alongside alternative therapies. Our alternative therapies are complementary to traditional medicine, providing us more resources to help keep your pet healthy and to treat chronic conditions and provide drug-free alternatives to pain management.

Our compassionate and dedicated healthcare team is committed to providing very personal attention, working with you to understand and address the health needs of your pets.


  • John Herrity, DVM, Practice Owner

    Dr. Herrity has been caring for pets in Northern Virginia for over 25 years. He enjoys the diversity of veterinary medicine with a focus on ultrasound, internal medicine and surgery. Over the years he has expanded his practice of medicine to include alternative and holistic therapies, including stem cell therapy, Veterinary Orthopedic Manipulation and cold laser therapy, and Bicom bioresonance therapy. He is continually exploring new and exciting ways to identify our pets’ health issues and determine the best treatments to meet their needs.

    In order to achieve his dream of working with animals, Dr. Herrity attended Virginia Tech and graduated with honors from the Virginia-Maryland Regional College of Veterinary Medicine. Dr. Herrity and his wife have two sons, Bryan and Patrick, and two daughters, Kelsey and Jessica. A Labradoodle named Bradley and a terrier mix named Rosie complete their family.  Read a little more about Dr.Herrity in the February 2014 issue of the Virginia-Maryland Regional College of Veterinary Medicine newsletter.

  • Alex Colvin, DVM, Practice Owner

    Dr. Colvin was raised in northern Virginia and graduated from Lake Braddock High School. He worked at Burke Animal Clinic while in high school until moving to Reston. He received his undergraduate degree in biology, summa cum laude, from Virginia Tech and DVM from Virginia-Maryland Regional College of Veterinary Medicine. Dr. Colvin began practicing in 2001 at Clocktower Animal Hospital. He rejoined Burke Animal Clinic in October 2009. Dr. Colvin and his wife, Dana, live in Ashburn with their daughter, son, two cats and a dog.

  • Elizabeth Johnson, DVM
    Associate Veterinarian
    Fear Free Emblem

    Dr. Johnson joined the Burke Animal Clinic Team in 2005 upon graduation from Virginia-Maryland Regional College of Veterinary Medicine.  Dr. Johnson loves her job helping people and their furry family members live healthier, happier, longer lives together.  She strives to be proactive in pet health care and makes individualized health care plans for patients who need them.  She does her best to make all veterinary visits pleasant, positive experiences for her patients.  She recently received her Fear Free certification. She specializes in using low-stress techniques to help patients enjoy their veterinary visits, or at least be more at ease during their appointments.  In addition to traditional medicine, ultrasound, dental and surgical care, she supports alternative therapies, integrating them into her patients' individual health care plans.   Dr. Johnson has a fondness for both canine and feline behavioral consultations and works with several local rescue groups.   Dr. Johnson received Northern Virginia Magazine’s Best Veterinarian award for 2017 and 2018 and was interviewed by NBC regarding one of her rescue cases.  In her free time, she enjoys spending time with her family, gardening (flowers, vegetables, and fruit), and creative art activities.  She also loves working with horses.  She currently resides in Fairfax with her husband, daughter, and rescued pup, Kenny.  

  • Liz Olsen
    Practice Manager

    Although Liz just joined the Burke Animal Clinic team in May of 2010, she has been a very happy client for over 14 years. She has been pursuing her passion for animals through volunteer work with Homeward Trails Animal Rescue and has fostered 25 dogs over the last few years. She finally made the break from her job as a project manager at a large financial institution to work in the pet industry, starting out as the general manager of a doggie daycare and pet sitting business and then moving on to a dream job working with the wonderful doctors and staff at Burke Animal Clinic.

    Liz is responsible for day-to-day management of the clinic as well as marketing and communications, hiring, and helping to foster partnerships with local rescues and nonprofit organizations.

  • Eva
    Licensed Veterinary Technician

    Eva joined Burke Animal Clinic in 2007.  Initially she worked as a receptionist and then as a vet assistant.  Working as an assistant led to her desire to become a technician.  Eva earned her veterinary technician degree and license in 2009.  After graduation she worked at the clinic for a while and then chose to expand her veterinary horizons.  For roughly 2 ½ years she worked at a local animal shelter, running the anesthesia for their on-site spay/neuter clinic.  Her time at the shelter was very rewarding. She learned a lot! However, she missed the long-term relationship with both the clients and their pets, a relationship you can only get from a small, intimate practice. She treasured her previous time at Burke Animal Clinic so when she was ready to leave the shelter, her first choice was BAC. She rejoined the team in February 2014 and is very excited to be back! Eva shares her home with her husband and their big eared four legged pit mix, Tango!

  • Faith
    Licensed Veterinary Technician

    In 2015 Faith received her Virginia Veterinary Technician license and A.A.S. in Veterinary Technology  after completing the Vet Tech Program at Northern Virginia Community College.  Faith works with us part-time while pursuing an Environmental Science degree at GMU.  Besides her love of animals, Faith enjoys the great outdoors.  In her free time she like to hike.    

  • Regina
    Licensed Veterinary Technician

    Regina joined the practice in November of 1991. She earned a Bachelor of Science degree in Biology from Syracuse University and an Associate in Applied Science degree in Veterinary Technology from Northern Virginia Community College, where she graduated summa cum laude.

    A love of animals, medicine and technology makes Veterinary Medicine the perfect choice for this technician.

  • Lianne, Veterinary Assistant / Receptionist

    Lianne lives in Burke with her husband of 25 years and two children. Pets have always been an important part of Lianne’s life. She and her family currently have three dogs and 4 cats – yikes! Lianne is in the process of making a career change and will be going to school to become a licensed vet technician. She loves travel, scuba diving, soccer, volley ball and working out.

  • Cassi
    Veterinary Assistant / Canine Massage Therapy Student

    Cassi found her way to Burke Animal Clinic in 2010 after six years of working in the animal field, starting as an assistant dive safety officer at an aquarium in North Carolina.  Working closely with their husbandry staff she discovered her love for caring for animals.

    After the aquarium she worked in small animal clinics before moving back to Virginia.  Cassi is interested in anesthesia, rehabilitation and emergency/trauma veterinary medicine.  

  • Joyce
    Veterinary Assistant /Receptionist

    Joyce came to Burke Animal Clinic in July of 2012.  What appealed to us at first was her experience at a call center help desk.  The front desk can be challenging on busy days with booked appointments, ringing phones and emergencies and we need people who can handle those challenges while being compassionate and caring.  Joyce filled those shoes pretty easily!  And, she adds value by being able to work as a receptionist and vet assistant. She is currently in school working towards becoming a vet!

  • Linda, Receptionist

    Linda joined our team in 2014.  She is a foster for one of our rescue partners, Fancy Cat Rescue. After bringing her fosters here for care, she thought it might be a fun place to work so she answered an employment ad we placed.   She has quickly become a valued member of our team.  She is a real estate agent with wonderful people skills!  This, combined with her love of animals, makes this the perfect fit!

  • Jose, Receptionist and Veterinary Assistant

    Jose came to Burke Animal Clinic in October 2013.  He was referred to us by Andrea, one of our vet assistants.  And we are so thankful!!  Jose started at the front desk as a receptionist and now is cross-trained to work as a vet assistant.  He also works with his father providing home healthcare to people who need medical assistance at home.  He has a wonderful way with people and animals and it shows! 

  • Sarah, Senior Receptionist

    Sara has been with Burke Animal Clinic since October 2011.  Clients are familiar with her smiling face and wonderful laugh.  Her love of animals and people is evident every day as she goes above and beyond to help our clients and patients get the care they need.  Sarah and Liz worked together at Dog Paws and Cat Claws Daycare and Pet Sitting previously.  When Liz came to work at Burke Animal Clinic as the Practice Manager, she knew one of her first things to do was get Sarah to join the team!  Sarah has been a key member of our pet care team ever since.

  • Lena

    Lena came to work at Burke Animal Clinic in November 2010.  Lena has a lot of experience in the medical field and works at a hospital in Arlington.  But, she loves animals and people so much, she comes to Burke Animal Clinic to work because it's so much fun and she always  says 'it's her home away from home'!  Lena's long time here at the clinic adds great value to our team.  She is a proud and wonderful puppy-mama to 4 fur babies, a pit bull baby named Dewby and 3 chihuahua mix puppies named Benny, Mimi and Terry Jane!   Her warm and friendly personality puts people and their pets at ease! 

  • Evita, Vet Assistant


  • Lauren
    Veterinary Assistant

     Joined our team in 2018. 

  • Evelyn
    Veterinary Assistant

    Joined our team in 2018.

  • Justin
    Veterinary Assistant

    Joined our team in 2018.

  • Catherine

    Front desk, food orders and more! Oh, my!