John Sellars is a native Springfieldian who was executive director of the History Museum on the Square from 2005-2022. In March 2022, he became Executive Director Emeritus. He began his career with the museum as a volunteer when it began as a part of the bicentennial celebration in 1976. After his retirement from a career in marketing in the beverage industry, John returned to Springfield and retired in 2004. He and his wife, Jane, a retired schoolteacher, have five children and seven grandchildren.