Bill Day became an industry leader early on in his career. He began working as a line employee for Champion Home Builders in 1960. Bill has owned sales centers in Nebraska, Wyoming and Colorado. Along with his wife, Eileen, and son, Bill, Jr., he owns and manages Day Mobile Homes. Day is the founder of Wyoming MHA, serving as its first President and continuing as a member of the Board of Directors. Day also actively participates in the Colorado MHA.