Registered architect, Georgia, South Carolina, Maryland, Florida, Tennessee Transportation planner C.E. Maguire, Inc., Waltham, Massachusetts, 1971. Design manager Sea Pines Company, Hilton Head Island, South Carolina, 1973-1975. Architect, corporation secretary Maddox & Associates, Professional Corporation, Savannah, Georgia, 1975-1977.
President Spriggs & Wilkes, Professional Corporation, Savannah, 1979-1983. President The Spriggs Group, Professional Corporation, Savannah, since 1983. Member National Committee Architecture for Justice, since 1978.
Project director Art in Public Places Program, Chatham County, Georgia, 1977-1978. Board directors Collaborative Resources International, Inc., Savannah, 1979-1984.
Author: Patterns of Change, The Evolution of a Courthouse, 1978. Architectural works include Chatham County Courthouse, Savannah, 1978, Residence for Officials from Kuwait, Kiawah Island, South Carolina, 1975, Flight Operations Center, Dobbins Air Force Base, Georgia, 1987. Board trustees architectural consultant Telfair Academy of Arts and Sciences, Savannah, since 1977.
Member Leadership Savannah, 1977-1978.
Served to captain Civil Engineering Squadron, United States Air Force, 1971-1973. Member National Council of Architectural Registration Boards (certified), American Institute of Architects, (president South Georgia chapter 1984, award Georgia and South Georgia chapters 1984), National Trust for History Preservation, Association for Preservation Technology, History Savannah, Georgia Conservancy. Clubs: Harvard of Washington, Harvard of Atlanta, Princeton of New York City, Savannah Golf, Columbia Country (Chevy Chase, Maryland).