Dr. Thatcher was raised in Northern California where he developed his love for animals and interest in science. He received his Bachelor of Science degree from the University of California-Davis in Animal Science. He did additional graduate work at Oregon State University in Physiology. He received his Doctor of Veterinary Medicine degree from the School of Veterinary Medicine-University of California-Davis.

He has been working at VCA Marina Animal Hospital since 1983 where he has developed a close relationship with many clients that he now considers friends.