Bowie Volunteer Fire Department, Bowie, MD 1978-86
Maryland Fire and Rescue Institute, University of Maryland, 1977-79
Fire Chief, Lake Barton Fire Control District, Orlando, FL 1974-77
Union Park Volunteer Fire Department, Orlando, FL 1965-69
Potomac Heights Volunteer Fire Department, Indian Head, MD 1956-63
Business
Cordovan Company, Bowie, MD Fire and Emergency Services Consultants and Training 1982-1985
Killen's Tree Service, Orlando, FL professional tree removal,1965-1974
Killen Enterprises, Inc, La Plata, MD residential refuse collection, professional tree removal, and farm feed sales, 1962-1965
Bumpy Oak Kennels, La Plata, MD and Orlando, FL, breeder, professional trainer and exhibitor of pure bred German Shepherds, Welsh Corgis, Irish Setters and Doberman Pincers, 1962-1977
Organizations
President, International Association of Fire Chiefs 2005-2006
Former Commissioner, Commission on Fire Accreditation International.
Founder and Charter Chairman of the Federal/Military Section of the IAFC; served three terms as Chairman.
President International Association of Fire Chiefs Foundation 2000-04, Trustee since 1999 and served as Board Member, and Vice-President.