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, CVT

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


Office Manager, MBA

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.