Dr. Custis received his DVM from Virginia-Maryland Regional College of Veterinary Medicine in 2005. During his two years in a progressive small animal practice in Houston, Texas, he developed a particular interest in oncology. Thus, he then pursued a one year small animal medicine and surgery internship at Carolina Veterinary Specialists in Greensboro, North Carolina. Subsequently, he completed a dual program consisting of a Master of Science in Radiological Health Sciences, and a residency in veterinary radiation oncology at Colorado State University Flint Animal Cancer Center. He became board certified in Radiation Oncology by the American College of Veterinary Radiology in 2011. During his residency training at the Colorado State University Flint Animal Cancer Center, Dr. Custis became proficient in the utilization of new modalities such as intensity modulated radiation therapy (IMRT) and stereotactic radiation therapy (SRT) in an effort to improve local tumor control and decrease normal tissue side effects. Dr. Custis remained on faculty at Colorado State University until joining our team in 2015. His research interest's center upon the treatment of spontaneously occurring tumors in client owned animals with an emphasis upon the potential translational applications and the benefits of radiation therapy.

In his spare time, Dr. Custis enjoys the outdoors, golf, and running with his canine companion Huckleberry.