Johnson has been developing and managing residential and commercial enterprises for nearly 50 years. He has been responsible for the implementation of a variety of federally funded programs, including public housing, Section 8 housing, housing rehabilitation (single-family and multi-family), Community Development Block Grant (CDBG), Urban Development Action Grants (UDAG), Urban Homesteading, and as a Section 202 Housing consultant. He has coordinated the development of over 70 multi-family housing complexes utilizing federal, state, and conventional financing, of which more than 40 used the federal low-income housing tax credit. Johnson has conducted over 600 training sessions on fair housing requirements, providing essential knowledge to various real estate professionals.