Dr. Geoffrey Berthiaume

Veterinarian/Owner, Topaz Veterinary Clinic

Dr. Berthiaume grew up in New Hampshire and always had a great interest in animals of all sorts including birds, insects, and reptiles. He attended Keene State College in New Hampshire where he earned his Bachelor's degree in Biology and graduated Magna Cum Laude. While in college, Dr. Berthiaume worked as a park ranger for the Army Corps of Engineers and as a veterinary assistant at the Monadnock Region Humane Society. He attended Tufts University School of Veterinary Medicine in Boston, Massachusetts, graduating as a Doctor of Veterinary Medicine in 1996. Following graduation, Dr. Berthiaume took his first job in New Hampshire and spent a year taking care of a variety of animals including cats, dogs, horses, sheep, rabbits and even a bear cub! He and Dr. Marzke then moved to Tempe, Arizona where they have been practicing since 1997. Dr. Berthiaume is a member of the American Veterinary Medical Association (AVMA), the American Animal Hospital Association (AAHA), and the Arizona Veterinary Medical Association (AzVMA). In his free time, he enjoys hiking, gardening, refurbishing motorcycles, and spending time with his family.

Dr. Sarah Marzke

Veterinarian/Owner, Topaz Veterinary Clinic

Dr. Marzke grew up in Tempe, Arizona and decided she wanted to be a veterinarian in first grade.  Her experiences with her own pets (including her beloved dog "Topaz") as well as many hours spent volunteering and later working in veterinary hospitals inspired her to pursue this career.  She left Arizona to attend Princeton University where she graduated with honors with a Bachelor's degree in Biology.   She then attended Tufts University School of Veterinary Medicine in Boston, Massachusetts.   She graduated as a Doctor of Veterinary Medicine from Tufts in 1996 and was awarded the American Animal Hospital Association Senior Student Award for Proficiency in Small Animal Medicine and Surgery.  Following graduation, Dr. Marzke completed an intensive one year internship in small animal medicine, surgery, emergency, and critical care at Santa Cruz Veterinary Hospital in California.  She then moved back to Tempe, Arizona with Dr. Berthiaume in 1997 and they have been practicing here ever since.  In 2013, Dr. Marzke completed the International Veterinary Acupuncture Society acupuncture training, bringing integrative veterinary medicine to Topaz Veterinary Clinic.  From 2015-2017 Dr. Marzke served as an adjunct faculty member at Midwestern University School of Veterinary Medicine where she enjoyed being involved with teaching veterinary students.  She is a member of the American Veterinary Medical Association (AVMA), the American Animal Hospital Association (AAHA), the Arizona Veterinary Medical Association (AzVMA), the International Veterinary Acupuncture Society (IVAS), and the American Academy of Veterinary Acupuncture (AAVA).  She has also served on the Public Relations Committee for the AzVMA.  In her free time, she enjoys running, hiking, and spending time with her family. 

In addition to their two daughters, Dr. Berthiaume and Dr. Marzke have several furry, feathered, and scaly family members: a Labrador Retriever named Scout, a cat named Bunny, a tortoise named Squirt, several chickens, and countless fish!

Dr. Kerri Bourne

Veterinarian

Dr. Bourne lived in several states before moving to Phoenix at the age of 12.  At a young age her sister said, "You should be a vet, you really understand Charbon (the family's poodle)".  The seed was planted.  Dr. Bourne obtained her undergraduate degree in Animal Health Sciences from the University of Arizona.  During her college years she worked in multiple veterinary hospitals as a technician.  There she gained insight and experience in the veterinary field.  In 1994 she graduated from Colorado State University with her Doctor of Veterinary Medicine degree.  She returned to the valley and has practiced in small animal medicine ever since.  Although she enjoys all aspects of veterinary medicine, she has a special interest in behavior.  Her goal is to make each veterinary visit as stress-free as possible (even getting on the floor with patients!).  She is a member of the the American Veterinary Medical Association (AVMA) and the Arizona Veterinary Medical Association (AzVMA).  She and her husband live in Phoenix with their 2-legged and 4-legged children.