Dr. Sean Penn

Veterinarian and Medical Director

Dr. Sean Penn was raised in Stillwater, Oklahoma, near the campus of Oklahoma State University. He received his Bachelor’s degree in Zoology from OSU in 1993 and his Doctor of Veterinary Medicine degree in 1997, also from OSU.

Dr. Wendy Patterson


Before becoming a veterinarian, Dr. Wendy Patterson spent almost 20 years working in the fields of human resources and business management. During that same period, she also owned an Arabian horse farm and bred and showed her horses.

Dr. Emily Ozmun


Dr. Emily Ozmun grew up here in Phoenix, AZ. At a very young age, she had a passion for medicine, and knew veterinary medicine was for her!


Hospital Administrator

Jennifer Ray, CVT is the Hospital Administrator. She was born and raised in Phoenix, Arizona.


Office Manager

Tammy joined Horizon Animal Hospital in 2016 as the hospital manager. She was born and raised in New York and loves the NY Yankees! She has been a licensed veterinary technician since 1994.

Jonea (JJ)

Lead Certified Veterinary Technician

Jonea, more commonly known as JJ, has been working at Horizon since 2011 and is currently the lead technician supervisor. She is starting to prep to elevate her CVT license and get specialized in another aspect of the field to further her education and skills.


Certified Veterinary Technician

Andrea has been a part of the Horizon AH team since 2008 (first as a boarding attendant, then technician assistant, and finally a certified licensed vet tech) during which she went to school and received her CVT license in 2011.


Veterinary Technician

Beth moved to AZ at the age of two. After high school, she set out for adventure on the east coast, but the lure of the Valley called her back home.


Veterinary Technician

Kathryn has been a technician with Horizon AH since September 2021. She is currently getting her Bachelors in Biology with an emphasis in pre-med at Grand Canyon University and she will be graduating in the spring of 2023.


Veterinary Technician

Sam has been a technician at Horizon since July of 2021 and worked before that as a technician at an ER vet.


Client Relations

Virginia moved to Arizona from the East Coast in March of 2020. She has worked at Horizon since November of 2021, and I couldn’t be happier.


Bording Attendant

Olivia joined our team at Horizon Animal Hospital in June 2022. She has been in the animal industry for eight years now and it’s always been her passion to care for them.


Boarding Attendant

Matt was born in Maryland and moved around a lot growing up. He started his career with animals by walking the neighbors' dogs and then later he worked with the military working dogs in the Air Force.



Karen grew up in Dayton, Ohio with a family that loved all kinds of animals from dogs, cats, and rabbits to birds. The joy from early childhood helped her discover her passion for pets, which has led her to a dream career of dog grooming for over 40 years.