Our Doctors and Staff

Jennifer Dietz Kumar, VMD

Veterinarian, Owner

Dr. Kumar has owned South Coast Pet Hospital since July 2012. She completed her undergraduate studies in Biology and French at Wellesley College, followed by her veterinary studies at University of Pennsylvania in Philadelphia. After graduating from veterinary school, she completed a rotating internship at Animal Surgical and Emergency Center in Los Angeles. She worked as an emergency clinician for five years at VCA West Coast, a local large referral and specialty hospital.

Dr. Kumar loves treating all companion animals, but has a special interest in the care of exotic pets including small mammals, birds, and reptiles. She has extensive experience in emergency medicine and enjoys that fast pace and diverse nature of the cases. In her free time, she loves outdoor activities with her husband and daughter (Aria). Don’t forget to say hi to her best friend Omi, a rescued cocker spaniel mix – he comes to work with her every day!

Dr. Kumar + puppies

Matias Aramburu, DVM

Associate Veterinarian

Dr. Aramburu received his doctor of veterinary medicine degree from Purdue University, College of Veterinary Medicine, a rigorous program in a major academic division of the university. Dr. Aramburu has been practicing small pet veterinary medicine since 1999 and has an extensive wealth of knowledge in geriatric and internal medicine. When he’s not treating patients, Dr. Aramburu loves spending time outdoors with his wife, three children, and two dogs. Dr. A joined the South Coast Family in August 2017.

 Matias Aramburu

Kara Yatabe, DVM

Associate Veterinarian

Dr. Yatabe received her Bachelor’s Degree in Animal Science from UC Davis in 2012. She graduated Veterinary school from Ross University School of Veterinary Medicine, located in the Caribbean on the island of St. Kitts and Nevis, and spent her clinical year at Louisiana State University School of Veterinary Medicine for my clinical year. She has special interests in Ophthalmology and Dermatology. In her free time, she enjoys traveling with family and friends, relaxing at the beach, and a good Netflix binge. She is a fur-mother to two dogs, Kona and Seth, and a cat named Lilo. She joined the South Coast Pet Hospital family in November 2017!


Justin Greco, DVM, DACVS

Veterinary Surgeon

Dr. Greco has been board certified in veterinary surgery since 2007.  He is a 2002 Phi Zeta graduate of the School of Veterinary Medicine at the University of California, Davis. Upon graduation, he completed a rotating internship at the University of Pennsylvania, School of Veterinary Medicine. He received his formal surgical training at the Animal Medical Center, in NYC, the oldest and most established post graduate veterinary training program in the country. Dr. Greco manages our complicated soft tissue and orthopedic surgical cases.

justin greco

Mark Lojero

Hospital Manager and Lead Veterinary Assistant

Jill Wester

Lead Client Service Representative

After college, Jill worked at multiple executive positions and owned her own business. These jobs were not her passion – she has always loved animals! Her dream was to help animals and form long-term bonds with their fur parents. She completed a veterinary doctor assistant degree and then worked in two different Specialty Hospitals as a Doctors Assistant (Surgery Department) and Medical Director Assistant. Knowing Dr. Kumar from a previous hospital, she jumped at the opportunity to join her team! In her spare time, she loves going to the beach and spending time with her husband, family, and their pooches. Her fur babies include Daisy (an old lady beagle-bassett mix), Naughty Nikki (a spoiled 2-year-old yorkie), and the newest addition Kelsey (a 7-year-old yorkie).

Jill Wester

Kelley McCrimmon

Veterinary Assistant

Kelley has worked at South Coast Pet Hospital as a veterinary receptionist and assistant for over a year. She loves working with all the animals that come into the hospital, but has a particular fondness for birds! She hopes to expand her knowledge of veterinary medicine by attending veterinary school in the near future and is currently in the process of applying. Kelley actually holds an M.A. in Applied Linguistics and taught ESL for three years before deciding that career was not for her. Now, she looks forward to working with animals for many years to come. When she’s not busy volunteering at a parrot sanctuary or cat rescue group, Kelley likes to read, hike, travel, and hang out with her two kitties, Ebony and Tomato.

kelley ruble


Antoine Chesnot

Veterinary Assistant

Antoine has worked in the veterinary field for over three years. He is currently enrolled at Stanbridge University to become a Registered Veterinary Technician. He provides lots of comic relief, adores working with animals, and is our resident native French-speaker. He loves to study (!) and go on adventures with his girlfriend and their beautiful blue-nosed pitbull, Luna. 

antoine tech