Adults with severe and persistent mental illness who received employment services through mental health and/or vocational rehabilitation programs had higher employment rates than individuals who did not receive any employment services. Individuals who received services from both programs had significantly higher employment rates than individuals who received services from only one program. Results indicate that employment services had a greater relative effect on older clients and clients with a schizophrenia diagnosis than on other individuals. This state-wide study relied exclusively on analysis of administrative/operational databases that provide the employment rates for both recipients of vocational services and other clients.