Assistant architect Ministry of Works, Government of Kenya, Nairobi, 1973, architect, 1973-1974, superintending architect, after 1974, deputy chief architect National Housing Corporation, Nairobi, 1976-1977, chief architect, 1977-1980. Chief architect, chairman contractors registration committee Ministry of Works, 1980-1983. Chairman Board Registration of Architects and Quantity Surveyors, since 1980.
Founder, principal Joel E.D. Nyaseme & Associates Chartered Architects, Nairobi. Major works include: Library for Ramogi Institute of Advanced Technology, Kenya, Hostel at Nation Industrial Vocational Training Centre, Kenya, Hostel in Nairobi, Kenya National Union of Teachers Branch Offices, Siaya, Kenya, Kisumu, Kenya, headquarters Regional Centre for Services in Mapping and Surveying, housing Kisumi district Rural and Urban Cooperative Society Board directors Kenya Polytechnic University.