About FlexVets

FlexVets is an on demand veterinary relief agency created to address veterinarian shortage and mental health issues in the veterinary industry.

To learn more or if you have relief needs, please contact [email protected]!

Our People

Joe Simmons, DVM

Dr. Simmons is a full time relief doctor and founder of FlexVets.  He enjoys practicing quality veterinary medicine across the board, particularly in ER settings.  When not on the hospital floor, he can be found surfing, rock climbing, or spending time with his family.

Chelsea Dillon, BVSc, MVM, ABVP (Avian) Candidate

Dr Dillon is originally from Canada and began her veterinary career in an avian specialty practice in Vancouver, BC.  Dr Dillon eventually decided to further her studies to become a veterinarian and graduated from Massey University in 2015.  She also completed several zoological training programs at a variety of zoos around the world including the San Diego Zoo.  Dr Dillon fell in love with San Diego and moved to the area in 2016. She completed both a 1-year rotating internship and a 3-year avian and exotic animal specialty residency at the Pet Emergency & Specialty Center (PESC). She completed her residency training in July 2021. Dr Dillon is now a part time relief doctor as well as the medical director of a mobile wellness clinic based in San Diego.

Heidi Schulze, DVM, DACVECC

Heidi Schulze received her Doctor of Veterinary Medicine from the University of California, Davis. After working in Southern California at a small animal emergency practice and completing an internship at the University of Pennsylvania, she completed a residency in Emergency and Critical Care at Cape Cod Veterinary Specialists in Massachusetts. She became a Diplomate of the American College of Veterinary Emergency & Critical Care in 2012. After working in Ottawa, Canada she ultimately returned to southern California to be closer to family. Dr. Schulze enjoys all aspects of emergency and critical care, but her specific interests include sepsis and the management of patients with multiple organ dysfunction. In her spare time she enjoys photography, reading and spending time with her family.

AnnMarie MacKenzie, DVM

Dr. MacKenzie wanted to be a veterinarian since grade school, but took a longer route to her chosen occupation than most. She worked as a software developer for 5 years and had an opportunity to live and work in India, where she volunteered those skills. When living in Bhubaneswar, she spent all of her free time feeding and caring for street animals – cows, chickens, pigs, dogs and cats alike – which reawakened her passion for animal health. After she completed her placement and returned to her home country of Canada, she immediately returned to school to make her dream of becoming a veterinarian a reality. She graduated from the University of Melbourne in 2020, and thoroughly enjoys her day-to-day career as a vet. She finds her work very meaningful and relishes creating trusting relationships with her patients and clients, while also helping to guide and educate clients on how to make the best decisions for the health of their companions.  Dr. MacKenzie has two dogs that are her world – JB and Zuko. JB is a senior Indian Street dog who has moved all over the world with her – from India, to Canada to Australia. He now gets to spend his golden years living in sunny Los Angeles. Zuko is a young and spirited chihuahua mix who was surrendered to a clinic where she worked. In her free time, Dr. MacKenzie enjoys getting outdoors with her pups for hiking and back-country camping.

Alison Osbrink, DVM

Dr. Alison Osbrink earned her Doctor of Veterinary Medicine from the University of Minnesota, Twin Cities. She is now excited to serve the local community’s dogs, cats and exotic pets as a veterinarian in her hometown. Her interests include dermatology, dentistry, and surgery.  As a published animal behavior researcher, she also has a special interest in behavior and has completed additional training to better understand and treat behavioral issues in dogs and cats. Dr. Osbrink loves all animals, but hairless ones have a special place in her heart

Angelique Schultz, DVM

Dr. Angie Schultz is a seasoned veterinarian with broad experience. She has worked in emergency practice and general medicine. She has experience with exotics. Additionally, she has worked internationally. Globally, she is affectionately known as Dr. Angie. Currently, she is a candidate in the CCAT (Certified Companion Animal Therapist) program through North Carolina State University and expects to complete the course in 2026. Rehabilitation and integrative medicine are areas of growing interest and learning for her. Her household is a bit of a zoo and she spends copious amounts of time putting limits on her husband’s acquisition of pets and desperately keeping all the animals out of the garden. She enjoys gardening, flower arranging, baking and traveling. Her herb garden is growing and expanding. She and her husband have two daughters who are off to college now.

Alyssa Gall, MBA

Alyssa Gall is the scheduling and practice manager for FlexVets.  She received her MBA from California State University, Fullerton, as well as her BBA from Loyola Marymount University.  Alyssa is excited to help improve veterinary quality of life through unique and innovative management and logistics solutions.  Alyssa also enjoys outdoors activities and spending time with her two dogs.