Doc Marshall practiced medicine in Great Bend for more than 25 years and served in the Army Reserves for seven years. As an OB/GYN, he delivered more than 5,000 babies, giving him a deep appreciation and passion for the sanctity of life and an intimate understanding of the healthcare system. During his time in medicine, Doc Marshall was more than a physician. For 25 years, he was a business owner who signed a paycheck every other week for a practice that grew from 5 people to eventually more than 300.

Faith and community continue to be pillars in Doc Marshall's life. He and his wife Laina taught Sunday school for over 25 years, and he served as an elder, deacon, and board chairman of his church. He has coached numerous community and youth sports teams and is a proud Rotarian having served as a past District Governor for the service organization. He also has a passion for the outdoors and spends as much time as possible at his family's farm, the Quivera National Wildlife Refuge, and Cheyenne Bottoms.

Doc and Laina, have been married for 38 years and are the parents of four children, and have four grandchildren.