Meet Our Highly Experienced Veterinarians
We are proud to offer the highest quality animal care in Orange County! You can trust your loved one in our hands!


Dr. Jeff Margolis

jeff margolis veterinarian

Dr. Jeff Margolis holds a Master's Degree from Boston University, a DVM from Tufts University, and has been practicing in CA since 1996.

His interests lie in endocrinology, dermatology and general surgery. Jeff is the owner of OAH, a proud member of the AVMA, CVMA and SCVMA and works with the Mission Viejo Animal Shelter, Grayhound Pets of America and DAWG.

He is a lover of all sports (including avid stand-up paddlesurfer) and of music, and gets out as often as he can to participate in both. He currently lives with his wife Jody, daughter Zoe, son Jake and pets, Shea, Beckett, Ebbet and Fergie.

Jeff recently adopted a new golden retriever puppy to join the family, and makes it his personal goal to ensure all of his patients feel like their pets are part of the family as well. Jeff greatly values all of his clients/patients, and appreciates all of the years of service and opportunities to be a part of your pet's lives. With over 15 years of service to the Orange County Area, he is excited for every new patient!



Dr. Daniela Gestine

veterinarian andrea thormahlen

Dr. Daniela Gestine grew up in Mission Viejo and worked as a receptionist for Olympiad Animal Hospital over 14 years ago!  Since then, Dr. Gestine graduated Summa Cum Laude from Cal Poly Pomona with a Bachelors in Animal Science and left to earn her Veterinary degree (DVM) from UC Davis.  In 2009 she moved back down to Southern California to practice medicine full time and in 2015 was honored to return to Olympiad and join the doctor staff.

Daniela’s professional interests include Internal Medicine, Geriatric Care, Preventative Medicine, and Feline medicine. She is fluent in Spanish and is a member of the American Veterinary Medical Association, the California Veterinary Medical Association, and the American Association of Feline Practitioners.

Daniela lives in Irvine with her husband Jon, their son Gabriel, their Puggle Hermione and their newly adopted Havanese, Violet. In her free time, Daniela enjoys spending time with her family and friends, traveling, and going to parks, beaches, and theme parks.

Building long-term relationships with clients and their pets is Daniela’s greatest professional joy. She is excited to be back at Olympiad Animal Hospital and looks forward to meeting you and your furry family members soon!



Dr. Jennifer Osborne

veterinarian andrea thormahlen

Dr. Jennifer Osborne is a Northern California native. She began her journey into veterinary medicine at the age of 15. She initially started by working as a kennel attendant then moved up to veterinary technician prior to going to college. She attended Azusa Pacific University and Waldorf University while completing her Bachelors degree in Biology. Shortly after graduation, she applied and was accepted to Western University of Health Sciences where she completed her DVM degree. 

She has a special interest in preventative medicine, dentistry, surgery, and oncology!

Dr. Osborne now lives in Mission Viejo with her husband Beau and her new puppy Finn! When she is not treating pets, she enjoys hot yoga, being outdoors, and visiting Disneyland! 

She looks forward to creating a lasting friendship with you and your pet! 

Meet The Rest Of Our Office Staff >>

Animal Hospital

Olympiad Animal Hospital
23032-A Alicia parkway
Mission Viejo, CA 92692

Call us today to schedule an appointment for your pet. Our staff is always available for you and your pet!

Clinic Location

Follow Us Around The Web
mission viejo animal hospital facebookmission viejo animal hospital twittermission viejo animal clinic youtube

Keep up to date on all Olympiad Animal Hospital news and information by following us on facebook and twitter. orange county citationorange county veterinarianorange county vetmission viejo pet care
mission viejo pet emergency