Meet the Team

DVM, Owner

Dr. Susan O’Brien followed her lifelong aspirations of becoming a veterinarian. She graduated from the Atlantic Veterinary College in 2010 with a Doctor of Veterinary Medicine degree. She is a 2006 graduate of Sweet Briar College in Virginia with a Bachelor of Science degree in Biology.

In her final year of veterinary school, Dr. O’Brien completed a rotation in a rural Peruvian village, treating dogs, cats, donkeys, and horses. This experience sparked a passion for philanthropic efforts and volunteerism that continues to guide her career.

After veterinary school, Dr. O’Brien completed a year-long internship at a mixed animal practice in her native Ohio. She remained at the practice for two more years as an associate veterinarian, focusing on general medicine and emergency care of horses, dogs, and cats.

She later moved to Colorado and began working at a small animal clinic while developing her own business. Her inspiration for founding Colorado On-Site Veterinary Services was to elevate preventative care with dental maintenance, vaccine protocols, deworming strategies, and nutritional support.

She has earned several advanced certifications, including:

• Veterinary Acupuncture (Medical Acupuncture for Veterinarians)
• Chiropractic Care (International Veterinary Chiropractic Association and Options for Animals College)

In her free time, Dr. O’Brien enjoys riding, hiking, fishing, and exploring Colorado with her husband, Kenny, and daughter, Violet. They share their home with three dogs, two cats, a Haflinger, two Quarter Horses, and a lively group of ducks and chickens.

Part-Time DVM

After earning her degree from Colorado State University, Dr. Annie Schmidt made the Western Slope her home.

She believes in an individualized, compassionate approach to veterinary care and is a strong advocate for the human-animal bond.

Her professional passions include surgery, geriatric care, and the treatment of small mammals such as rabbits, guinea pigs, hamsters, and rats.

Outside of work, you’ll find her enjoying the Colorado outdoors with her family — hiking, floating rivers, snowshoeing, and skiing. She shares her home with two gray cats and two adventure-loving dogs.

Part-Time Relief DVM

Dr. Steve comes to us from Ocala/Marion County, Florida — The Horse Capital of the World.

He solo practiced there for over four decades, beginning with a thoroughbred broodmare practice that evolved to include exotics and veterinary student clerkships from the University of Florida.

He is known fondly as FatherDoctorMister Murphy through his 20+ years serving the Sunshine Region Pony Club as a doctor, mentor, and “designated dad.”

Dr. Steve relocated to Colorado with his high school sweetheart, Teresa, to be closer to their daughter, an equine veterinary surgeon. Along for the journey: a homebred thoroughbred named Booker, two mini ponies, two German Shorthaired Pointers, two cats, and an African Grey named Westly.

Registered Veterinary Technician (RVT)

Originally from Pennsylvania, Phoebe moved to Colorado in 2014. After living in several parts of the state — from Durango to Denver — she settled in the Valley to pursue a degree in Veterinary Technology at Colorado Mountain College, graduating in May 2021.

Though her background began in small animals, Phoebe quickly discovered her passion for animals of all sizes and species, leading her to On-Site Veterinary.

She’s the proud fur-mom to two dogs, Biggie and Archie. When not at work, you’ll find her summiting Colorado’s 14ers, rock climbing, or trail running as she trains for her next big race.

Customer Service Representative

Born and raised in Colorado, Karely has been surrounded by animals her whole life. She grew up with horses, dogs, and farm animals, which led her to seek a role that aligned with her love for both people and animals.

At On-Site Veterinary, she enjoys supporting the team and making sure clients and pets feel welcome. In her free time, she enjoys outdoor adventures, traveling, and spending time with family and friends.

Registered Veterinary Technician (RVT)

A Colorado native, Lacey has lived in the Gypsum/Eagle area her entire life. She is a 2024 graduate of Colorado Mountain College’s Veterinary Technician program.

When not at the clinic, she helps her family raise cattle (which are definitely considered pets), rides her mule in the mountains, or relaxes at home with her cats and dogs.

Practice Manager

Heather grew up in Rochester, NY.

She has since lived in the Vail Valley for a decade and currently lives in Gypsum with her 2 dogs, cat, and husband. She got her start in the valley as a nanny, dogsitter, and ski instructor. Her professional career started with a local real estate company where she grew into her strengths in Marketing and Management. She is thrilled to be bringing additional support to On-Site Veterinary and its clients. Outside of work Heather enjoys camping, paddleboarding, a quiet night with a puzzle or some live music in the outdoors.

Current Clinic Cat

Trudy quickly rose through the ranks and now proudly serves as Director of Operations (according to her).

She delegates much of the day-to-day work to her fellow feline, Frannie, while she oversees things from her favorite nap spot in the basement.

When awake, Trudy enjoys staring intently at anyone nearby until they give in to her demands for affection.

Current Clinic Cat

Frannie is an accomplished napper and a frequent front-desk fixture.

After a successful career as a house cat, she brings charm and mystery to her role as On-Site’s “Artist in Residence.” Her availability is unpredictable, but her presence is always appreciated, especially when it involves treats.

Louise Marron DVM, DAVDC-NSS, DAVDC-EQ

Dr. Louise Marron is exclusively dedicated to providing expert oral healthcare to dogs, cats, and horses.

Serving the health of companion animals has been her life’s ambition since she was a young girl. She graduated from Colorado State University with a Bachelor of Science degree in Equine Science in 2002 and a Doctorate in Veterinary Medicine in 2006.

While offering medical, surgical, and dental services as a mixed-animal general practitioner, Dr. Marron discovered a passion for dentistry and oral surgery. She embarked on an arduous journey in pursuit of a deeper knowledge and an advanced skill set in the discipline of animal dentistry. She was mentored by esteemed colleagues across the country and around the world. Among her mentors were her father and sister, both dentists for humans. She ultimately achieved Board Certification for all species in 2017 as a Diplomat of the American College of Veterinary Dentistry. An additional Board Certification, specifically for horses, was achieved in 2022.

Dr. Marron applies her hard-earned expertise to promote oral comfort and health in companion animals on the Western Slope. She collaborates with colleagues and provides education to veterinary professionals to benefit as many animals as possible. It is a pleasure to work with excellent veterinary teams, like the one at On-Site Veterinary Services.

In her free time, Dr. Marron enjoys time with her husband, Tim, and her son, Orville. They enjoy all of the outdoor activities our beautiful Colorado has to offer. They love their animal family which includes a dog, two kitties, a quarter horse gelding, a giant tortoise, and a bearded dragon.

Dr. Radway earned her bachelor’s degree in Microbiology, Magna Cum Laude, from Colorado State University in 1996, followed by her Doctor of Veterinary Medicine, Summa Cum Laude, from the same institution. She completed a medicine, surgery, and emergency internship in 2001, then spent a decade in general practice in Steamboat Springs, Colorado. Her ultrasound training began in 2008 at the Academy of Veterinary Imaging, where she completed over 600 hours of continuing education and a year-long imaging program, culminating in certification in ultrasound and echocardiography.

In 2013, Dr. Radway became a Diplomate of the American Board of Veterinary Practitioners, recognizing her clinical excellence. She founded Rocky Mountain Veterinary Ultrasound in 2011, serving over 45 clinics in Colorado and a large practice in Phoenix. Outside of work, she enjoys outdoor adventures with her husband and two daughters, including skiing, hiking, and rafting. Their home is shared with a lively group of pets—two dogs, a cat, and two horses.