Haymaker is an associate veterinarian at Mount Laurel Animal Hospital and 24-hour Emergency Service in New Jersey. His veterinary interests include internal medicine and surgery. He works in the primary care department as well as in the emergency service. Haymaker is a member of the American Veterinary Medical Association and is the treasurer of the Southern New Jersey Veterinary Medical Association. He is also an adjunct instructor of veterinary technology at Manor College in Jenkintown, Pennsylvania.