Our Team

Our Team in Chandler, AZ

Our staff is the backbone of Pet Doctor, without them we could not continue to offer the quality of service to our clients the way we do.

Pet Doctor of Chandler
Pet Doctor of Chandler Team (from left to right): Aaron, Brittany, Marylin, Dr. Nelson, Selena, Pauly, Zach

Dr. Harrison Nelson

Medical Director

Dr. Harrison Nelson was born in St. Joseph, Missouri and grew up on a farm near the rural community of Plattsburg, Mo. His parents, Jack and Mary, where second generation farmers on a piece of land known as the Nelson Farm, which was started in the late 1800’s by Jack’s Grandfather Henry. The farm raised cattle, hogs, corn and soybeans along with many horses, goats, and chickens and the uncountable number of cats and dogs that roamed the property. Dr. Nelson was a star athlete in high school participating in football, wrestling, and track. He attended Drake University in Des Moines, Iowa on a wrestling scholarship and majored in Pre Med. After a short stint in the Navy (Seabees) He decided to pursue a course in Pre Vet. After a year in Graduate school at the University of Missouri in microbiology he was accepted into Veterinary School at MU. Graduating in 1978 he moved for a short stint to Las Vegas. A job opening at Blue Cross Animal Hospital in Tucson under Dr. Wayne Randall and Dr. Ed Buck, who would become his mentors, became available. He started the Animal Medical Clinic of Tucson in 1985 and was one of the first 24 hour emergency facilities in the city. The hospital flourished through the nineties and eventually was sold to Veterinary Centers of America in 2001. He worked for several years for VCA and in October of 2013 Opened Pet Doctor LLC.

He has two sons Matt and Zach and wife Julie. Zach, his wife Ashley, and their daughters Lilly and Leigh are from Plattsburg, MO. Julie is an avid pet owner and involved with Tucson 2 Tails cat rescue. Dr. Nelson and Julie have 7 pets! The three cats are Ozzie, Charlotte, and Oreo. The four dogs are Opie, Maya, Muffie, and Sophie. Dr. Nelson is an avid outdoorsman, hiker, and Arizona Wildcat fanatic.

Dr. Sherif Louis


Dr. Sherif Louis earned his degree in veterinary medicine at Assuit University in Egypt. Upon completion of vet school, he moved to the United States where he worked his way up in veterinary industry. Starting out as a kennel tech and worked his way up through the ranks as a veterinary assistant, technician, then hospital manager, and now as a veterinarian. In 2015 he matriculated to an intensive veterinary skills training program in Ontario Canada. He finished a one-year internship in soft tissue surgery and emergency medicine with VCA in the Phoenix metro during the beginning of summer 2017. His areas of interest within veterinary medicine is soft tissue surgery and internal medicine.

When Dr. Louis is not helping clients at Pet Doctor he enjoys watching his favorite soccer team Al Ahly SC, based out of Cairo, Egypt. He is an avid hiker and looks forward to exploring the many trails South West Arizona has to offer. 


Hospital Director


Brittany Pet Doctor in Chandler

Surgical Services Manager

Morgan Wagner

Morgan Pet Doctor of Chandler

Client Care Rep


Pauly Pet Doctor of Chandler

Client Care Rep

Marylin Sanchez

Hospital Manager

Courtney Merwin

Client Care Rep

Nicole Levesque

Nicole Pet Doctor of Chandler

Client Care Rep


Talisa Valencia Pet Doctor

Client Care Rep


Operations Manager

Marianne Vacassy

Client Care Rep


Client Care Rep

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Hours of Operation:

Monday – Friday:
8 am – 5 pm

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4811 S Arizona Ave
Chandler, AZ 85249