Meet The Team

We are currently updating our team bios and photos. More to come soon!

Dr. Javier A. Mulero

D.V.M. - Medical Director

Dr. Mulero is a dedicated veterinarian with over 40 years of experience in the field of veterinary medicine. Originally from Gurabo, Puerto Rico, he graduated Cum Laude from the Universidad Autónoma de Santo Domingo in 1981. In pursuit of new opportunities, he moved to Florida in 1989 and began his career as a mobile veterinarian, providing compassionate care to animals in need.

Over time, Dr. Mulero developed a deep appreciation for the Saint Cloud community, leading him to establish his first permanent practice, Osceola County Animal Hospital, in 1997. Since then, he has been a trusted provider of veterinary care, known for his expertise and dedication to his patients and their owners.

Dr. Mulero has been happily married to Evelyn Mulero for nearly 30 years, and together they share a love for animals, including their two beloved pets—a French Bulldog named Lucas and a Schnauzer named Lola. In his free time, he enjoys traveling in his RV, immersing himself in historical novels, and watching crime series. His passion for animals, strong work ethic, and commitment to his community continue to make him a respected and valued figure in the veterinary field.


Mrs. Evelyn Mulero

Hospital Administrator


Dr. Lissette R. Esteban

D.V.M. - Associate Veterinarian

Dr. Esteban was born in Puerto Rico. She lived in Iowa for 6 years where she graduated from Iowa State University with a

Bachelor's degree in Zoology with a Minor in chemistry and is a D.V.M. in Small Animal Medicine

with 34 years of experience. In her free time, she loves reading, gardening and traveling. 


Mrs. Julie Aldebol

Practice Manager

Julie has been an integral part of our team since 2021, bringing her skill set and dedication to the development and implementation of our clinic’s operations. With over a decade of experience as a Veterinary Technician, she has a deep passion for animal care and thrives on building strong relationships with both pets and their owners.

Julie’s ultimate goal is to provide exceptional medical care to pets in need while leading a compassionate, knowledgeable team that shares her vision. Her commitment to excellence and teamwork makes her a valuable asset to our clinic.

Outside of work, Julie enjoys soaking up the sun at the beach, paddleboarding, and exploring new destinations through travel. She is also a devoted pet parent to her beloved thirteen-year-old fur baby, Roscoe.


Ms. Michelle M. Cassidy

Practice Manager

             Michelle was born in Texas raised in an Air Force household, she was able to live and travel the world as a child. She lived in Okinawa, Japan for awhile and spent a summer in Hawaii with her father and brother. She has an Associates degree in Web and Graphic Design as well as an Associates degree in Medical Billing and has studied Business Management at Valencia College. She also has a background in Permanent Make-up, Facial Specialist/Esthetician, Body Wrapping and is also a Make-up Artist. She loves animals and art and in her free time works on her art as a side business and hobby. She has one daughter, Aaliyah, a Chinese Crested Yorkie named Mimi, a cat named Snickers and a Crested Gecko named Benito. 

            She has worked in the Veterinary field for over 30 years since the age of 10 helping her step father and mother with anything they needed. She has cleaned kennels, rooms, floors, bathrooms, assisted in cesarean sections in the mobile vet van, filing, answering phones, making appointments and assisting anywhere in the clinic she is needed.  She loves all the fur babies that come in and always does her best to make every client and patient feel at home. 


Mr. Michael Cassidy

Administrative Assistant - I.T. Technician

Michael is a seasoned professional with a diverse skill set spanning computers, customer service, and the audiovisual industry. With over five years of dedicated service at Narcoossee Animal Hospital, he has been an invaluable asset in ensuring seamless operations. His passion for animal care began early, having volunteered at Saint Francis Animal Hospital during his youth.

As an administrative assistant, Michael plays a crucial role in maintaining system efficiency and financial accuracy. His sharp problem-solving abilities, coupled with a knack for bringing humor into the workplace, foster a positive and collaborative environment.

Outside of work, Michael is an avid reader, traveler, and writer, always seeking new experiences and knowledge. He prioritizes fitness, often enjoying bike rides or long evening runs, sometimes accompanied by his energetic husky, Zero. Whether unwinding with a compelling book or film, he embraces a well-rounded lifestyle that balances intellect, adventure, and well-being.

Most importantly, Michael is a devoted father, cherishing the time spent with his son and creating lasting memories together.


Ms. Aaliyah M. Robles-Cassidy

Client Services Specialist

        Aaliyah is from Kissimmee, Florida. She has 1 dog named Mimi, 1 cat named Snickers and 1 crested gecko named Benito. She loves singing, reading, going on walks, spending time with friends and family, dancing, playing basketball, sports and traveling. 

        She graduated from Bishop Moore High School with Honors and has an Associates Degree from Valencia College and is currently studying Nursing and she is planning to become a Nurse Practitioner in the future. She cares deeply for animals and does everything in her power to make sure our clients and patients feel great when they come in for their appointment. 


Mrs. Amy Tacey

Veterinary Technician

        Amy is from Savannah, Georgia and has two amazing kids and a great husband! She has 2 Screech Owls, 6 Falcons, 1 Boxer and 1 Boston Terrier. She loves being outside, going to the beach, riding jets skis, hanging out with family and friends, playing corn hole and going to concerts. 

        Amy attended Penn Foster and has a Veterinary Technician Degree. She also attended Seminole State College for 2 years. She has been working in the Veterinary field as a Veterinary Technician for 31 years and she loves what she does! She has a big passion for surgeries and always makes sure to watch over your fur babies during their surgeries whether it is to watch their vitals or give them love and reassurance that they are ok. 


Ms. Ashanti Negron-Santiago

Veterinary Technician

        Ashanti was born in Puerto Rico and has been living in Florida for the majority of her life. She has a white Maltese named Chiki who loves napping and a Golden/Lab mix named Milo who is way too friendly. She absolutely loves going to the beach, it is her safe place. She loves reading books and learning more about animals which she feels she has a great passion for. She is great at jet skiing and making French toast!

       Ashanti took a dual enrollment course to become a Certified Veterinary Assistant. She graduated high school with honors and is currently on track for a Bachelors Degree in Biology. She loves animals and loves caring for your pets.  


Ms. Patricia Perez

Veterinary Assistant

        Patricia is from Puerto Rico and currently lives with her Mom, Dad and her dog Milo. She loves the gym, the beach and reading. She loves animals especially her Milo.

        She has an AA Degree and is currently working on her AS Degree in Health Sciences and Veterinary Technology.  She has been working hard in our clinic to care for our clients pets always showing them love. 

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