Dr. Hayles is a long time San Diego resident, completing a Bachelor of Science at UC San Diego in Animal Physiology and Neuroscience in 2000. He completed the DVM program at UC Davis in 2006.

Dr. Hayles then pursued a competitive one-year rotating small animal internship at the Veterinary Medical and Surgical Group (VMSG) in Ventura, CA. Directly following his internship, Dr. Hayles began the radiology residency program at Washington State University (WSU) College of Veterinary Medicine. His training in diagnostic imaging included small and large animal diagnostic ultrasound, radiography, magnetic resonance imaging (MRI), computed tomography (CT), fluoroscopy and nuclear scintigraphy. Concurrently, Dr. Hayles earned a Masters in Veterinary Science (MS) degree, with research focusing on abdominal MRI and correlations to abdominal ultrasound; specifically regarding adrenal gland anatomy.

In 2010, Dr. Hayles successfully completed the certifying ACVR examination. After several months remaining at WSU as a clinical instructor, Dr. Hayles and his wife, Andrea, returned to San Diego.

When not working, Dr. Hayles enjoys surfing, ultimate Frisbee, travelling and spending time with his wife, two sons, Alexander and Andrew (Drew), his dog (Charles Jr.) and cat (Bali).