Student, Georgia Institute of Technology, 1945. Bachelor of Science, United States Military Academy, 1949.
Commissioned Second lieutenant Army of the United States, 1949, advanced through grades to 1st. lieutenant, 1952. Resigned, 1952; member 89th Congress from 3d Georgia district, 1965—1967. United States Secretary Army Washington, 1973-1975.
Campaign manager President Ford Committee, 1975-1976. Director Crested Butte (Colorado) Mountain Resort, 1975—1994.
President National 4-H, service committee. Former chairman board trustees Ida Cason Callaway Foundation, Pine Mountain, Georgia, Freedoms Foundation at Valley Forge. Former board regents University Systems Georgia.
Republican candidate for Governor of Georgia, 1966. Candidate Republican primary for United States Senate from Colorado, 1980. Chairman Colorado Republican Committee, 1981-1987, chairman The Global Organization of Parliamentarians Against Corruption, 1987-1993.
Member Defense Base Realignment and Closure Commission, 1992. Committee Georgia Department Economic Development, 2001-2007. 1st lieutenant infantry United States Army, 1949-1952.
Member World President' Organization (past president), Young President' Organization (past president), Chief Executives Organization, Capital City Club (Atlanta), Piedmont Driving Club (Atlanta), Bohemian Club (San Francisco), Phi Delta Theta, Phi Kappa Phi.
Married Elizabeth Walton, June 11, 1949, (deceased December 08, 2009). Children: Elizabeth Callaway Considine, Howard Hollis Junior, Edward Cason, Virginia Callaway Martin, Ralph Walton.