Meet
Your Pet’s
Emergency
Team
Emergency Veterinarians
Diane Johnson, DVM
Hospital Owner/Medical Director
Hospital Owner/
Medical Director
Dr. Johnson received her veterinary education at Ross University in 1994 and has practiced emergency medicine since that time. She has extensive training in all types of surgery, especially orthopedic, along with a special interest in cardiology and ultrasound.
Always looking to provide the most progressive care, Dr. Johnson is a life-long learner, constantly striving to add progressive technologies and acquire new techniques that will benefit her patients, from sophisticated diagnostic equipment to the latest in anesthesia, pain management, and pharmaceuticals. Dr. Johnson particularly enjoys training and mentoring veterinarians and technicians and witnessing their excitement as they master new skills that directly impact pets and their families.
In her free time, she enjoys spending time with family, her menagerie of pets including dogs, cats, horses, and birds, doing Bikram Yoga, and all kinds of water sports. Dr. Johnson’s latest hobby is exploring the country in her RV.
Cassandra Van Nieuwal, DVM, CVMA
Emergency Veterinarian/Co-Medical Director
Dr. Van Nieuwal followed the footsteps of her grandmother and aunt who have been involved with equine care and veterinary medicine for many years. By age 3, she was already tagging along caring for the animals and knew she wanted to become a veterinarian.
Dr. Van Nieuwal obtained her veterinary degree from Ross University in 2015 including her clinical year at Louisiana State University. While trained in all aspects of veterinary care, her strong interests are in exotic medicine and surgery, as well as endoscopy. In addition to her veterinary training at Ross University School of Veterinary Medicine and Louisiana State University, she also has prior work and teaching experience at Bowling Green State University Herpetarium. Wishing to further her ability to positively impact her patient’s healing process, Dr. Van Nieuwal became a Certified Veterinary Medical Acupuncturist in 2022. She is a mom to a plethora of pets including dogs, cats, a snake, and a turtle.
Having transplanted from Ohio to Florida to join AEHV, her free time includes enjoying the outdoors year-round, running with her dogs, horseback riding, snowboarding, paddle boarding, jet skiing, and spending time with family and friends.
Alyssa Carver, DVM, MS, CCRP
Emergency and Rehabilitation Veterinarian
After completing her veterinary degree at St. Georges University in Grenada, Dr. Carver took a position in western Pennsylvania close to where she grew up. With a little coaxing from a classmate, and the promise of year-round sunshine (plus a few hurricanes), the decision to take the plunge and become a Floridian was not that difficult. In addition to working in the ER, Dr. Carver oversees our rehabilitation services and is a Certified Canine Rehabilitation Practitioner, Fear Free Certified, and USDA Accredited. Outside of work, she loves the outdoors, enjoys boating, hanging out with friends, fiancé, and working out. Her current family consists of two cats that she adopted from Grenada named Tuko and KeeKee.
Alexis Bogosian, DVM
Emergency Veterinarian
Dr. Bogosian, or “Dr. B”, grew up in a small town in Connecticut and knew at a very young age that she was meant to be a veterinarian. She completed undergraduate studies at the University of Connecticut before moving to the Midwest for veterinary school. She graduated from Iowa State University College of Veterinary Medicine in 2014 and first worked in Ohio as an equine practitioner. Tired of the cold winters, she moved to Florida in 2015 and spent several years in mixed and small animal practices prior to joining us.
Aside from emergency medicine, her interests include soft tissue surgery and acupuncture. Dr. B loves to travel and has been fortunate enough to perform veterinary work on wildlife preserves in South Africa, as well as help control the stray animal population in Ecuador and on the Galapagos Islands.
When not at work, Dr. B enjoys spending time with her fiancé and their two dogs (Jax & Harley) and four cats (Oliver, Roo, Zoe and MRSA – yes, she has a cat named after a bacteria!). She loves going to the beach, riding her bike on local trails, hiking in national and state parks, watching crime documentaries, and baking cupcakes.
Gemma Massett, DVM
Emergency Veterinarian
Dr. Gemma Massett grew up in the heart of Kansas. She obtained her undergraduate degree and Doctor of Veterinary Medicine degree in 2021 from Kansas State University. After completing her education, Dr. Massett decided to move to Florida to be closer to her fiancé and enjoy the warm weather.
Dr. Massett is the proud owner of two beloved horses, Abby and Eddie, who have been by her side for most of their lives. Both horses made the long journey from Kansas to Florida with her, and they continue to be an important part of her life. In her free time, Dr. Massett enjoys outdoor activities such as biking and hiking, as well as spending time with her family and fiancé. She also enjoys reading and soaking up the sun on the beautiful beaches of Florida.
Veterinary Technicians and Assistants
- Stephanie, CVT – Technician/Charge Capture Specialist
- Jasmine, CVT – Certified Veterinary Technician/Charge Capture Specialist
- Samantha, CVT – Certified Veterinary Technician
- Shelby – Technician Supervisor
- Chantal – Technician Supervisor
- Lynn, CVT – Rehab Technician
- Elizabeth (Beth) – Technician
- Alexis – Technician
- Joe – Technician
- Caitlyn – Technician
- Christy – Technician
- Helica – Technician
- Marah – Technician
- Emily – Technician
- Sara – Technician
- Liana – Technician
- Leah – Technician
- Chrissy – Technician
- Jill – Technician
- Dakota – Technician
- Skylar – Technician
- Mari – Assistant
- Cassidy – Assistant
- Savanna – Assistant
- Olivia – Assistant
- Jessica – Logistics Coordinator Supervisor
- Linda – Logistics Coordinator
Client Services
- Jazzmyn - CSR Supervisor
- Joan - Medical Records Specialist
- Angie – Client Service
- Jackie – Client Service
- Diana – Client Service
- Virginia – Client Service
Administration
Shelby Dease
Hospital Manager
Shelby was born in Illinois and moved to Florida to attend Keiser University, where she graduated as a Radiologic Technologist.
She was introduced to veterinary medicine by her in-laws who enticed her to work with them at a local general practice. Over the next several years she was able to work her way up to a new career as a Veterinary Technician. Shelby believes switching from human medicine to animal medicine was the best choice she could have made. She has been a veterinary technician for over 8 years now.
Shelby joined AEHV in 2020 and quickly worked her way up from Technician to Supervisor and now to her current role as Hospital Manager. She believes that emergency veterinary medicine is where her heart lies, and she loves the challenge of not only helping to manage critical patients but also offering compassion and empathy to our clients and our staff.
Shelby has been an avid animal lover since she was a kid, known to bring home stray and unwanted animals and nursing them back to health. She now shares her home with a menagerie of animals that include 2 dogs (Kimber and Captain) 3 cats (Venison, Tarpon, and Snook) a horse named Jade, a miniature donkey named Homer, and a Brazilian Rainbow Boa named ROYGBIV- or Roy for short. She especially loves reptiles, and someday hopes to have a room in her home just for them.
In her spare time, Shelby loves to spend time outdoors, fishing, hunting, hiking, or spending time out on the boat. She shares her home with her beautiful little girl and her husband.
Deb Bahr, CVT, CVPM
Hospital Administrator
Deb has over 33 years of experience in veterinary medicine and has been with Animal Emergency Hospital since April 2024. She graduated in 1991 from the University of MN, Waseca with an associate in applied science degree in Veterinary Technology and spent 12 years working in general practice and emergency medicine. In 2003 she made the switch to management and earned the distinction of Certified Veterinary Practice Manager (CVPM) in 2006.
Deb has been working in management and leadership in multiple capacities over the years. Along the way, she also became a Karen Pryor Academy Certified Training Partner (KPA CTP) working in dog training and behavior, and is also Fear Free Certified Level 3 (Elite). In 2023 Deb was awarded Hospital Administrator of the Year with her previous employer.
Deb is committed to lifelong learning and her favorite part of her job is cultivating positive leaders who empower their teams. She shares her home with her husband and is a mom to 3 adult boys, 3 dogs, and a cat.
Sunni Willis, CVT, CCFP
Human Resources Manager
Sunni took the plunge and relocated to Florida from Massachusetts a few years ago. She is a certified veterinary technician (CVT) and has over 25 years of experience in veterinary medicine and hospital management.
Sunni has two grown children. Her daughter has followed in her footsteps and is a veterinary technician, and her son is a history teacher. She shares her home with her husband and two Chihuahuas named John Gotti and Violet. Now that she’s settled into life in the Sunshine State, Sunni can be found restaurant hopping via boat, or volunteering for animal rescue groups. She is passionate about finding every dog a forever home. She is also an avid football fan, always rooting for her hometown New England Patriots.