Our Staff

Walt Clark, Hospital Administrator

Walt is a native of Southern Arizona, growing up in the Sahuarita area. His original career was in diesel engine repair. He worked for Cummins Diesel for 17 years as a master mechanic and then as the Service Manager. A year after marrying Carole Treat DVM they decided to purchase Greenway Pet Kennels and form Greenway pet Clinic in 1995. Three years later, he left his position at Cummins and joined the staff at GPC as the Hospital Administrator. His duties include all accounting, payroll and bill paying aspects of running the practice, as well as fixing anything that breaks down in the clinic. His mechanical skillset has proven invaluable for the clinic and keeps everything running smoothly.

Danielle Barnewolt, Receptionist

Danielle is from Illinois and has recently relocated to Tucson for higher education. She has been in the veterinary field since 2013. Danielle has been passionate about animals since she was a child. She has 2 loving dogs at home. Danielle has volunteered at several animal shelters in the past alongside working in the field. She has always been interested in furthering her involvement and education in veterinary medicine. She previously worked at an animal ER while living in Illinois. She gained years of experience and knowledge from the clinic due to the vast differences in each animal and diagnosis. Danielle is specifically interested in big cats and yearns to help rehabilitate those in need. It is her life long goal to open a big cat sanctuary where she can help them live the life they deserve. While there are many years and obstacles to go, she is hopeful she will accomplish her dream of saving neglected and abandoned big cats.

Lluvia Valdez, Receptionist

Haley Langraf, Front Office Assistant, and Kennel Manager

Haley Landgraf is the manager of our boarding kennel and has worked at Greenway Pet Clinic fourteen years. She is always striving to make our kennels the best environment for our boarders and loves caring for the animals that come to us. When she’s not at work, she is home with her two kids, two cats, and one dog.

Michelle Robbins, Veterinary Technician

Michelle was born and raised in Tucson. She started working with animals when she was 14 years old. She began volunteering at the Humane Society of Southern Arizona and the Tucson Wild Life Center. She got her Vet Assistant Certificate in 2013. When she isn’t working she likes to spend her free time horseback riding, hiking with her pets and hanging out with friends. She has worked at greenway pet clinic for 3 years now.

Devona Hovinga, Veterinary Technician

Alex Dean, Veterinary Technician

Ashlyn Berhman, Veterinary Assistant

Nicole McNeely, Kennel Assistant

Levi the cat

Levi (AKA Leviticus), is our resident clinic cat. He is 9 years old and came to us when he was just a year old. Levi loves to chew on anything plastic, which landed him an outside cat at his previous owner’s because he kept chewing his owner’s insulin pump line at night. Once outside, he was likely hit by a car and came to us with a broken leg. We repaired his fractured right front leg, and he became a resident at the clinic from that point on, as outside life was not for him. Most time you willfind him sleeping on the copy machine, or his cat tree by the doctor’s desk. When the mood strikes him, he will often wander into exam rooms during appointments.