Dr. Aaron Cohen DVM
Owner, Veterinarian
A native of Jacksonville Florida, Dr. Aaron Cohen’s first pet was a baby chick by the name of “Peep-Peep”, who eventually grew up to be a rooster. After that, he pretty much stuck to just cats and dogs.
Dr. Cohen attended the University of Florida, Gainesville where he studied animal science and psychology. Shortly thereafter, he transferred to Northeastern University in Boston. He completed his Doctor of Veterinary Medicine at Ross University, St. Kitts in the West Indies.
After serving in an internship program at the Massachusetts Society for Prevention of Cruelty to Animals in Springfield, Mass, Dr. Cohen settled in with Porter Square Veterinarians of Somerville for the next seven years. Deciding to start his own practice, Dr. Cohen began an exhaustive search that would bring him from the East Coast to the West Coast.
Dr. Cohen bought Peninsula Animal Hospital in December of 2010. He is active in the American Veterinary Medical Association, California Veterinary Medical Association, and the Monterey Bay Veterinary Medical Association. In his free time, he enjoys hiking, biking and conversing with his cats.
Years in Practice: 17
Education:University of Florida, Northeastern University, Ross University
Email: pahpets@icloud.com
Dr. Johanna Sherrill DVM, MS, Diplomate American College of Zoological Medicine
Associate Veterinarian, Medical Director
Dr. Johanna Sherrill graduated from the University of Georgia with a Degree in Veterinary Medicine in 1995 and a Master’s in Medical Microbiology in 1996. She then completed a general medicine and surgery internship in San Diego, an aquatic internship at Mystic Aquarium in Connecticut, and a residency in zoological medicine at the National Zoo in Washington, DC. Dr. Sherrill became board-certified in zoological medicine in 2005. She has worked as a relief Veterinarian in California for 20 years, treating all animal species even fish. She is passionate about marine conservation and an eco-friendly lifestyle.
Years in Practice: 28
Education: Doctorate Veterinary Medicine, MS-Medical Microbiology, BAS- Stanford University
Interests:Horseback-riding, Water Sports, Singing, Playing the Guitar
Email: pahpets@icloud.com
Casey
Director of Change Management and Strategic Programs
Casey joined our practice in December 2024, bringing a perspective enriched by six years of U.S. Navy service. As a veteran with a strong foundation in operations and executive coaching, Casey leverages his expertise to drive growth and innovation within PAH. His passion for building community-based programs empowers our staff to connect with and support more families, fostering a more meaningful impact. Casey finds joy in exploring and appreciating the beauty of nature and has a deep appreciation for the diverse landscapes and dynamic weather of the central coast. Casey also enjoys experimenting with culinary creations—a testament to his creativity and zest for life.
Education: MA – Industrial/Organizational Psychology, Certified Google Cybersecurity Specialist
Jasmine
Client Care / Veterinary Assistant
Jasmine joined our practice in 2013 and has since become our frequent MVP, learning many skills and performing a variety of roles. Her sunny disposition, willingness to help others, and charm with animals endears her to our clients and fellow staff. She strives to bring all she can to PAH, to make all our clients & their pets feel like a top priority. In her free time, Jasmine enjoys reading, art, gaming, time with family, and her cat, Daisy.
Gabi
Veterinary Assistant
With an open mind and compassionate heart, Gabriella joined the fun world of veterinary care in 2018, joining PAH in 2021. Straight out of high school and a mind focused on getting into vet school, she’s always eager to learn how to care for our four legged friends! When she’s not nose deep in a college text book, she’s running with her Rottweiler, snoozing with her Shih-tzu, or trying to cook with her cats who are always watching and ready to catch a bite!
Jeanine
Certified Veterinary Assistant
Jeanine first joined the PAH team in December 2021 as a Central Coast College student extern. Her love for animals started at a young age when the only book she checked out from the library was a book about different animals. That is how she decided a career with animals was in her future. Being at PAH she is excited to see every pet come through the door and will give them the best care that they deserve. Jeanine treats everyone and every pet with compassion and is joy to work with. In her free time you can find Jeanine spending time with her family and frenchie Rocky, reading a book, or playing video games.
Camila
Certified Veterinary Assistant
Camila’s love towards veterinary medicine started when she grew up around animals her family owned in Mexico: dogs, chickens, horses, and cattle. Her passion for animal husbandry is what makes her want to continue to become a Registered Veterinary Technician in the future. She joined PAH in the spring of 2024 and enjoys learning many new things about veterinary medicine everyday. She currently has an orange cat named Mr.Waffles, who she loves and spoils. Interests: Hiking, Music, Horror Movies, and Traveling
Marsi
Veterinary Assistant
Marsi joined the PAH team in 2024 with experience in working with both wildlife and domestic animals. She has volunteered at a marine mammal rehabilitation center while also working at a small general practice veterinary hospital. She is currently working on a program to become a Registered Veterinary Technician, and is eager to learn all that she can. In addition to enjoying being surrounded by animals, Marsi likes to draw, hike, and play video games. She doesn’t have any pets for now, but is looking forward to her next rescue animal!
Alice
Veterinary Assistant
Alice joined the PAH team in 2025 with experience in handling marine mammals and wildlife in the Amazon. (See Alice feeding a baby sloth in the picture!)
Alice is completing a B.S in Marine Science and is hoping to start vet school in the fall of 2026. While newer to small animal medicine, she is excited to learn anything and everything!
Alice currently has a tuxedo cat named Susan, who has been by her side for all of grade school and through college.
In her free time, Alice loves to read, bake, and hunt for sea glass.
Brenda
Registered Veterinary Technician
Brenda achieved her RVT certification in June of 2022. An RVT or registered veterinary technician is like being a PA or a physician’s assistant for people. Brenda can help triage your pet’s issues, administer anesthesia, place bandages, and other important services. She does her very best to provide compassionate and kind care. Brenda says, “I’m still growing as an RVT because I care about the quality of treatment I provide for your pets. I love this career, and I hope my work reflects it.”
Brenda’s dog, Harley, spends time at her mother’s house in Arizona. Brenda loves all dogs and cats that come in as her patients! She has an interest in surgery and surgical procedure management.
Keiko
Student Extern
Keiko is currently a student in a Registered Veterinary Technician program, completing her clinical externship at PAH. With a deep love for animals, her passion and future goal is to be involved in animal rescue, striving to create a world where every animal can live happily. She currently cares for two cats. After losing her beloved dog and one of her cats in early 2024, she has been looking forward to the day she can bring a new dog into her home and heart.
Gabriela
Technician Assistant
Gabriela joined us the summer of 2025. In her words: “I have had a love for animals for as long as I can remember — but it really started with my childhood dog, Winston. Taking care of him and growing up with him helped me realize how special the bond between people and their pets is, and it made me want to be a part of helping animals live long, healthy lives.
Before joining PAH, Gabriela worked at another clinic where she was part of a team helping to fight the stray overpopulation crisis. That experience made her even more passionate about animal health and showed her just how much of a difference this work makes — both for pets and for the people who love them.
Gabriela is working toward a bachelor’s degree in Biology. Her goal is to continue on to vet school and eventually become a veterinarian.
“I’m really excited to keep learning and to get more hands-on experience with the amazing team here. In my free time, I love music, movies, going on hikes or to the beach, visiting animal shelters, and grubbing on a good meal!”
