Johnson is president of Spectrum Support Inc., which supports hundreds of people with developmental disabilities such as mental retardation, autism, and cerebral palsy, 60 percent of whom also suffer from psychiatric disorders like schizophrenia, bi-polar disorder, or depression. In the 15 years Johnson has served on the board, Spectrum Support has provided day habilitation, housing, employment opportunities, and family support in Maryland and Tennessee. Under Johnson’s direction, the agency has grown in one year from an annual budget of $4 million to nearly $6 million and has begun a residential program that currently houses 26 people.