Skip to main navigation Skip to main content

Colorado Springs Veterinary Surgery and Rehab Center Colorado Springs Veterinary Surgery and Rehab Center

Call us today: (719) 424‑7252
1603 West Colorado Avenue, Suite B,
Colorado Springs, CO 80904

Meet Our Staff


Marlin Geist

Dr. Marlin Geist

Dr. Geist feels it is a great privilege to provide care for you and your pet, combining sincere compassion with the most up-to-date medicine and surgery. He grew up enjoying science, but also loved animals and set his sights on being a veterinarian at an early age. Dr. Geist is passionate about a profession in which he can provide support and education for people as well as affection and medical care for animals. He takes great pride in his client sensitivity, consultation, and communication skills, and is excited to offer a wide array of surgical services at Colorado Springs Veterinary Surgery and Rehab Center/Westside Animal Hospital.

Dr. Geist became a veterinarian in 1996 from Washington State University, where he was recognized with a surgical scholarship. After 2 years in a general practice, he began advanced training in orthopedic (bones, joints, etc.) and soft tissue surgery. Specifically, such training included complex fracture repair, master of osteotomy (correcting deformities, birth defects, and surgical complications), arthroscopy, and other surgical techniques. Dr. Geist has also pursued advanced training in soft tissue, abdominal, and emergency surgical techniques. In 2004 he moved to California to practice emergency medicine and founded his own business, providing surgical services to a large, underserved area between San Francisco and Los Angeles. This included general & orthopedic surgery as well as minimally invasive surgery (endoscopy).

Dr. Geist has special interest in TPLO and other methods of joint repairs, endoscopic surgeries (GI flexible endoscopy, laparoscopy and minimally invasive spay/neuter/gastropexy, etc.), as well as wound healing/plastic surgery. Medically, he enjoys prevention/management of painful conditions, treatment of cancers, preventive health, and regenerative medicine.


Marisa Harris, CVT, CCRVN

Marisa Harris, CVT, CCRVN
Certified Veterinary Technician/Rehabilitation Nurse

I grew up in the Santa Ynez Valley, near Santa Barbara, California and moved to Denver in the fall of ‘14 to pursue a career in veterinary medicine. I graduated from Bel-Rea Institute of Animal Technology with High Honors in March of ‘17. During my stretch in school, I spent time volunteering at Aurora Animal Shelter and Zuma’s Horse Rescue Ranch. Straight after graduation, I was hired on at CRCG (Canine Rehabilitation & Conditioning Group), where I had completed my internship, thus starting my career in Canine Rehabilitation; so exciting!

After working with Dr. Danielle Wynn at her mobile canine rehab practice then at a VCA Hospital radiology department, I realized that Rehabilitation was where my heart truly was, so I found a position as a Canine Rehab Tech at Wheat Ridge Animal Hospital and continued that journey, working under Dr. Patsy Mich.

I started my CCRVN(Certified Canine Rehabilitation Veterinary Nurse) courses in the summer of ’20 through CRI(Canine Rehabilitation Institute), just before moving back to Santa Barbara, CA, to spend more time with my family working at Atlas Rehabilitation for Canines as their solo rehab technician and continued my online studies for CRI. I eventually felt the call to move back to Colorado in February ‘21 and found a welcoming space here at Westside Animal Hospital as their Rehab Technician. I officially became a CCRVN in May of ‘21 and am now looking forward to pursuing certification in Canine Massage.

My furry companion who has stuck by my side since April ‘17, my graduation gift to myself, is my darling dude, Valentine. He’s a 4.5 year old brown dog who loves to join me on backpacking, hiking, camping, and road trips. His favorite place to go after work is Bear Creek Dog Park. I couldn’t ask for a better adventure pup!

I enjoy traveling, live music, snowboarding, running, rock climbing, and anything thrill-seeking that CO has to offer, in my free time.