After medical school, Dr. LeVos did an internal medicine internship and partial residency at Loma Linda University (LLU). He was then drafted into the U.S. Army, serving as a general medical officer in South Korea and as an emergency room physician in Fort Ord, California. Dr. LeVos went on to earn an MPH from LLU School of Public Health and worked as assistant professor of health science in that department.
In 1979, Dr. LeVos began working as a family physician in a private group practice in West Virginia. He was the medical examiner and coroner of Ritchie County for over 20 years and the medical director of the Ritchie County Emergency Squads for over 25 years. He was also on the clinical faculty at West Virginia University School of Medicine for 10 years. He and his wife, Sandra Lynn, currently reside in Pennsboro, West Virginia, and they have one son, Ken.