Dr. Yocum opened Green Tree Veterinary Services and The Centre for Regenerative Medicine in 2010 and he opened Green Tree Animal Hospital in 2012. Dr. Yocum is also a consultant for Medivet America, a leading stem cell technology company. In addition to his interest in Regenerative Medicine Dr. Yocum is working toward certification in pain management.

The American Board of Veterinary Practitioners certified Dr. Yocum in 1996. He was president of the Kentucky Association of Equine Practioners and was the equine program director for the Kentucky Veterinary Medicine Association (KVMA) in 1997. Dr. Yocum recently presented at the Mid-America veterinary conference on advanced equine reproductive technology. He has also presented papers at Sydney University, Buenos Aires Argentina, Santiago Chile, and in Hong Kong on regenerative medicine.