Meet the Staff

Get to know the caring team from our front office staff, vet techs and veterinarians.


  • Mark R. St.Onge, DVM

    Veterinarian

    A resident of the Atlanta area since 1993, Dr. St.Onge is originally from Arkansas where he attended and graduated from the University of Arkansas. He is a 1988 graduate of Louisiana State University School of Veterinary Medicine and has spent time in veterinary practice in Georgia, South Carolina, Utah, and Virginia. His split SEC alumni background is no problem for him as he is an avid Arkansas Razorback fan.

    Having spent over a dozen years managing and visiting veterinary facilities, and speaking at veterinary schools, Dr. St.Onge has seen all aspects of veterinary practice. For three years he was fortunate enough to be an invited speaker at the Auburn University College of Veterinary Medicine, and he enjoys the mentorship opportunities being a "bit older" affords him. Dr. St.Onge finds his best moments are spent in the outdoors, with his family and friends, and with the pets he sees on a daily basis. He and his family which includes his rescue dog, Remington, have lived in the neighboring Northlake area for the past two decades, and he is thrilled to be part of the Brookhaven business community.

  • Jonathan Holzwarth, DVM

    Associate Veterinarian

    Dr. Jonathan is a graduate with honors from the University of Georgia College of Veterinary Medicine. A native of Boston, Jonathan attended Davidson University "in the glory days of Steph Curry", and is an avid Patriots fan (or what we call a Damn Yankee.) Dr. Jonathan came to us with experience at an Atlanta area clinic, and with a desire to become part of the community. His parents and one brother live in the Atlanta area, his other brother is somewhere else (we no talk about him), and he is dedicated to his cat, Sushi, his hipster beard, and for absolutely no believable reason Chelsea FC. In his free time Jonathan enjoys playing soccer, claims to workout with his brother a lot, is an on and off trivia champion, and enjoys touring breweries with his friends and brother.

  • Brittany Devlin, DVM

    Associate Veterinarian

    A native of somewhere up North, Dr. Devlin attended veterinary school in a place called Illi-noise.  She is married to a man of undetermined and unclaimed nationality who sports an accent of an equally questionable nature.  In her spare time Dr. Devlin and her husband enjoy both types of anime gaming (computer and board), as well as adult Disneying.  Along with numerous other employees, Dr. Devlin serves to advance the apparent nerdization of Buckhaven Veterinary Clinic.

  • Samantha

    Receptionist

    A transplant from the Commonwealth of Maryland, Samantha is our resident crazy cat lady. As if that weren't enough she is also into anime and professional wrestling. Samantha has been with Buckhaven for 6 years having joined us from a human internal medicine practice. She, her husband, and son have a resident population of four cats, and unless we stop her, at any moment in jeopardy of an additional adoption. She loves to cook, and frequently shares leftovers with us (if her husband doesn't find it and eat them first).

  • Sarah

    Receptionist

    Sarah was raised in the Atlanta area, and tried to move away to New Jersey, but was returned to sender. The recipient of diplomas from three different high schools Sarah joins us after having re-examined her life’s goal of becoming a high school valedictorian.   She currently lives with one of her brothers, (the other brother won the coin toss), and joined us after a failed internship at Piercing Pagoda.  Sarah appears to have attended the Ashley School of Energy where she received training in excitement control and disinterest.  She is a person of few words but when she does speak it is typically a really horrible dad joke or just to remind us that she is irreplaceable.  We are ambivalent about having her here.

  • Stephanie

    Receptionist

    For reasons we have been assured are in our best interest we are not allowed to know about Stephanie’s origins.  This brings us both a sense of comfort as well as keeps us on our toes.  Guardian to two dogs and a cat, Stephanie enjoys spending time with her pets, and reading spicy romance novels. They say big things come in small packages, but for us the jury is still out.

  • Yani

    Vet Assistant

    Hailing from the "New York" area, Yani is semi-fluent in both English and Spanish, and she enjoys raising guinea pigs, and cooking for herself and her fiancee'.  We have been assured that the guinea pigs are being raised as pets, but while Yani always brings her own home cooked lunch with her she never offers us any instead telling us that we "wouldn't like it."  She is super nice like that.  

  • Ashley/Linda

    Vet Assistant

    Originally interviewing with the name or alias of "Linda", Ashley came to us from another Atlanta area clinic.  Ashley lives somewhere well south of the airport, and as such is subject to the rolling roadblocks set up to limit the number of people from that end of town entering Atlanta.  A self-proclaimed energetic and personable individual, Ashley is also known by her coworkers as "Sheeyore".  In her free time Ashley likes to work on her show car (think LA in the 70's), watching TikTok, hang with her hubby, tend her growing flock of ducks, chickens, and guinea fowl, and generally exude an energy one beat above flatline. The force is weak with this one.

  • Ellie

    Vet Assistant

    A recent graduate of Berry College, which we have learned is not a horticultural school sponsored by the Georgia Berry Alliance, Ellie comes to us with prior veterinary experience.  Despite (or possibly because of) her uncanny resemblance to Dora the Explorer, while at college Ellie was not a theater major, nor does she tend to “Disney like Devlin”.   While one of the shortest members of the staff, and for what we assume is a compensation mechanism, Ellie has made it known that within the clinic she should be referred to as “Momma.”

  • Various

    Team Members

    While their names may or may not be important we seasonally employee students who fit into one of the following categories:

    1.) Aspiring pre-veterinary college undergrad

    2.) Aspiring veterinary student

    3.) Dependant college undergrad seeking understanding of what they want to do in the future and being forced by their parents to work

    4.) Non-college students more motivated than most college students