Meet Our Veterinarians

Doug Mader, MS, DVM

DIPLOMATE, ABVP (Canine/Feline), DIPLOMATE, ABVP (Reptile/Amphibian), DIPLOMATE, ECZM (Herpetology)

Special interests in:

Internal Medicine, Endoscopy, Ultrasound, Soft Tissue, Orthopedic, and Laser Surgery, Exotic Animal Medicine, and Wildlife

Dr. Mader, a triple Board Certified veterinary specialist, was born in the upper Keys. He received Master’s degree in Animal Behavior in 1982 and Doctor of Veterinary Medicine degree from the University of California, Davis in 1986. After graduation, Dr. Mader completed a residency in Primate and Zoo animal medicine. During his veterinary and residency training, Dr. Mader’s areas of special interest were in the pharmacology of antibiotics in exotic pets. While living in Southern California, he owned a small animal/exotic practice for 9 years.

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Dr. Mader is the consulting veterinarian for the Key West Aquarium, the Marathon Sea Turtle Hospital, The Key West Butterfly Conservancy, the Theater of the Sea and the Monroe County (Sheriff Animal Farm) Zoo. Dr. Mader is an internationally acclaimed expert in Exotic Animal Medicine and travels over 50,000 miles every year teaching at Veterinary Conferences, Veterinary Schools, and Specialty courses. Dr. Mader is also on the review/advisory boards for several scientific journals. He has published hundreds of articles in scientific and veterinary journals, national magazines, newspapers, book chapters and is the Co-author/editor of the Saunder’s publication Reptile Medicine and Surgery. Dr. Mader is a Past-President of the prestigious North American Veterinary Conference, the world’s largest veterinary continuing education conference.

Amongst Dr. Mader’s many awards are the University of California, Davis, School of Veterinary Medicine Alumni Achievement Award, the U.S. Fish and Wildlife Conservation Award and the “Educator of the Year” award, granted twice, from the Western Veterinary Conference.

Gerry Diethelm, DVM

Geraldine Diethelm is of Swiss nationality. She was born and raised in Hong Kong, after which she moved to Switzerland and studied veterinary medicine. Dr. Gerry was accepted at the Washington State University to attend an internship in Small Animal Medicine and Surgery. After this, she gathered information for her thesis on Iguana Anesthesia at the Long Beach Animal Hospital in California. She worked at the Marathon Veterinary Clinic with Dr. Jim Greene for almost two years before purchasing the practice and becoming the new owner of the new Marathon Veterinary Hospital. Apart from her obligations at work, Dr. Gerry also donates time and materials to the Wild Bird Center run by Kelly Grinter.

Aundria Del Pino, DVM

Dr. del Pino grew up in Tennessee and moved to Florida in 1996 where she started working in wild bird rehabilitation in Tavernier with Laura Quinn. After her experience there she decided that to better help the birds she needed to go to Veterinary School. Dr. del Pino will always be grateful to Laura for her experience there and for being an inspiration to further her education. Dr. del Pino finished her Bachelor’s degree from the University of Florida in Wildlife Conservation and Ecology. She then attended Veterinary School in the Cayman Islands, St. Matthew’s University where she was fortunate enough to have received a vast amount of exotic animal experience. She had her clinical year at the University of Illinois and did a year internship in wildlife medicine at C.R.O.W, The Clinic for the Rehabilitation of Wildlife on Sanibel Island. After her internship, she began work at Banfield Pet Hospital and was there for 2.5 years until she received a position in Marathon with Dr. Mader. “I feel fortunate that I was able to move here and work with such wonderful people and be able to learn from everyone.”

Jason Carloni, DVM

Dr. Jason Carloni was born in New Jersey. He moved to Florida when he was 16. He started scuba diving, surfing, and sailing then renounced his Jersey-hood. Jason started working with animals as a kennel assistant and worked his way up to a technician where he developed his love for other family’s animals. He decided to change his career path and become a veterinarian. Jason studied biology at Florida Gulf Coast University. He went on to study veterinary medicine at St. George’s University in Grenada. He did his clinical year at the University of Georgia. This is where he became interested in emergency medicine and made it his focus. He now plans to develop his skills in surgery, endoscopy, and exotic animal medicine.

Trisha Doswell, DVM

Dr. Trisha Doswell grew up on the East Coast Barrier Islands of Central Florida. She fell in love with animals watching tortoises and bobcats roam the backyard, sea turtles nesting and hatching on the beaches, along with caring for a variety of her own pets. She attended University of Florida where she received her Bachelors of Science in Animal Science with a minor of Fisheries and Aquatic Sciences. Go Gators! Dr. Doswell attended St. George’s University in Grenada where she received her Doctorate of Veterinary Medicine. She completed her clinical year at Louisiana State University focusing on zoo and exotic medicine. Her interests include internal medicine, surgery, rehabilitation and dermatology.

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Dr. Doswell was a previous student, intern and then doctor at MVH. She then moved to Northern Florida in 2016 where she continued practicing emergency medicine, general practice small animal medicine and caring for injured wildlife. She returned to the beautiful Florida Keys and MVH in June 2018 to return working with the variety of species MVH is privileged to care for and treat. Dr. Doswell lost her beloved American Eskimo Ziggy in 2017 to osteosarcoma. She has since adopted two silly, lovable, goofy dogs named Toby (Cocker Spaniel/Maltese mix) and Phoebe (French Bulldog mix).

Angela Lawrence, DVM

Received her Bachelor of Science degree in Biology from Virginia Commonwealth University and obtained her Doctorate of Veterinary Medicine from Ross University in 2015. She gained practical experience with large and small animals with a focus on exotics during her clinical rotation at Louisiana State University.

She furthered her studies by completing a course with Wildlife Vets in South Africa, as well as externships at Audubon Zoo; New Orleans, LA and Smithsonian National Zoo; Washington, D.C. Her career interests include working with small animal, avian, and exotic animals as well as wildlife medicine.

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Dr. Lawrence is an Air Force Brat but calls Northern Virginia home. She moved to Florida in 2016 and enjoys spending time with her family, friends, and pets; dogs (Dice and Kitt) and cat (Schmidt). In her spare time, she enjoys Disney World, the beach, crossfit, reading, and traveling.