Meet Our Team

Our Tucson veterinarians Dr. Brett and Dr. Olson with the experienced, friendly staff of Rosemont Pet Clinic!


Staff 2019 (2)

Dr. John Brett – Veterinarian, Tucson Arizona

Veterinarian Tucson Dr BrettDr. Brett has been a small animal veterinarian for over 30 years. He attended the University of Arizona as an undergraduate and earned his Doctor of Veterinary Medicine at Colorado State University. Through the years he has expanded his learning and veterinary care to the holistic realm. Dr. Brett is unique in his ability to approach medical issues with both Western conventional veterinary medicine and alternative treatments such as acupuncture, VOM/chiropractic and herbal therapies. This is a powerful combination that he enjoys sharing with his patients and clients.

Dr. John Brett has been the primary veterinarian at Rosemont Pet Clinic since 2007. In 2009, Dr. Brett and his wife Donna acquired the animal hospital with a commitment to continue the exceptional veterinary medicine that Rosemont Pet Clinic has always provided their clients and patients.  He is grateful for the wonderful clients and pets that he cares for and the exceptional and loving people that work with him at Rosemont Pet Clinic.

Married for over 30 years, Dr. Brett has two children and a house full of pets. Music is a true passion and hobby. He has played drums in bands since college and even toured Europe with a band from Tucson. You can call him, John Brett the Rock and Roll Vet!

Dr. Melanie Olson – Veterinarian, Tucson Arizona

Born in rural Quebec, Canada, Melanie Olson grew up on a dairy farm where she grew to appreciate animals and realize her calling to be a veterinarian.  After graduating from the University of Montreal in 2000, Melanie moved to Phoenix for an internship at a busy emergency and surgery specialty center where she fell in love with the Southwest and has been here ever since working at emergency and general practices, including a stint at Rosemont Pet Clinic from 2004 to 2007.  Thrilled to be back home at Rosemont, she takes pride and comfort in the fact that Rosemont Pet Clinic is locally owned and is a place where patients, clients and team members are treated like family and with respect.  Our team’s synergy and happiness translate into a positive experience for our clients and their fur babies. She feels privileged to be able to form strong bonds with clients and enjoys helping them understand the examination findings and treatment plans, whether it be for preventive care or workup of a serious illness.  It is Dr. Olson’s priority to partner with pet caregivers and the Rosemont staff to develop the care plan that works best for each family with the shared goal of the pet’s wellness.
When not at work, Melanie enjoys spending time outdoors tending to her beloved desert plants, running, or reading. Her home is shared with her wonderful husband, Shane, and beautiful fur babies, Abby-Lou and Petunia.

Donna – Hospital Administrator

Veterinarian Tucson Donna BrettDonna has been in Tucson for over 40 years, attending High School, Pima Community College and the University of Arizona. She earned a degree in Mechanical Engineering and Business Administration. Donna worked as an engineer and manager for over 15 years before she and John decided to become partners in Rosemont Pet Clinic. This was a great move for them and Donna enjoys working with John, the Rosemont staff and being a small business owner.

When not at the office or working as a consultant, Donna loves spending time with her family; two children, relatives, friends and pets.  She enjoys being outdoors, riding her Harley, hiking, cooking, crafting, reading and playing rock band.

Brooke – Office Manager and Certified Veterinary Technician

Veterinary Technician Tucson BrookeBrooke, a native of Tucson, has been a veterinary technician at Rosemont Pet Clinic since 2003.  Because of her intense love of and compassion for animals, excellent technician skills and amazing ability to keep the clinic organized, Brooke is the heartbeat of Rosemont.  She shares her life with over a dozen dogs and two goats.  Her dedication to the pet community has lead her to be involved with local rescue organizations where she has helped save the lives of hundreds of animals.

While not tending to animals, Brooke can be found enjoying softball, poker, cliff jumping, tubing down the river, riding quads, or hanging out with lots of friends.

Mike - Veterinary Technician

Veterinary AssistantMike was born in California and grew up in Rio Rico where he graduated from Rio Rico High.  He joined Rosemont Pet Clinic in 2013 with his veterinary Technician certification and general studies associates degree from Pima Community College.  Mike is an animal lover and his family has dogs, snakes, fish and a bird.   He is very active and enjoys almost every sport out there (especially baseball) along with outdoor activities like camping, hiking and fishing.  When not at Rosemont, he enjoys spending time with his family and friends.  Helping people and making them smile is something he strives for everyday.

Joselyne - Veterinary Technician

JocelyneA graduate of Pima Medical Institute, Joselyne joined the Rosemont family in 2019 and fit in immediately with her technician skills, compassion, and kindness.




Paty - Clinic Assistant

PatyPaty joined Rosemont Pet Clinic in 2019 as a much needed and highly valued part of our team.  Paty has been a volunteer for and employee of  Tucson Unified School District for many years, helping students and teachers.  Paty’s kindness, organization, professionalism  and beautiful smile are treasures for staff and clients.

When not working, Paty enjoys sewing, reading and spending time with family and friends.  She has two canine companions: Duke, a blue-eyed Husky, and Sammie, an energetic, lizard hunting Brittany Spaniel mix.

Sonja - Clinic Assistant

Sonja is our wonderful summer helper.  As a student of biomedical engineering at ASU, we are fortunate to work with her for a few months.  She is a self motivated learner and adores any and all animals she encounters.   Her kind heart and work ethic are appreciated.

When not studying or working, Sonja enjoys arts and crafts, spending time with family and friends, and skating for the ASU roller derby team.

Our Pet Clinic

  • Full-Service Animal Hospital
  • Compassionate, Personalized Care
  • Friendly, Knowledgeable Staff
  • Conventional Veterinary Medicine and Complementary Care
  • Family Owned and Operated
  • Serving Tucson for over 30 years

Visit Us

Rosemont Pet Clinic
5065 E. 5th Street
Tucson, AZ 85711
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Monday: 7:30am-6:30pm
Tuesday: 7:30am-5:30pm
Wednesday: 7:30am-6:30pm
Thursday: 7:30am-5:30pm
Friday: 7:30am-5:30pm
Saturday: 7:30am-12:30pm
Sunday: Closed