Professor, "History of Political Ideas and Constitutional Theory," Colegio Mayor de Nuestra Señora del Rosario; "Contracts," Universidad Militar. Legal Division, Colombian Ministry of Public Health, 1973. Executive Director, Colombian Society of Tourist Agencies, ANATO, 1974-1975. General Secretary, Urban Development Institute, IDU, 1976. Director, Legal Services Division of the Chamber of Commerce of Bogotá, 1976-1980.