Based upon the organizational literature on adoption and institutionalization of innovative practices, a disseminable intervention protocol and materials (e.g., a guidebook for worksite health promotion steering committees) was developed. This intervention was evaluated in a randomized control trial comparing 13 treatment worksites to 13 delayed-treatment worksites on organizational health promotion practices (policies/environmental control, incentive programs, skills training activities, maintenance activities); employee smoking cessation and saturated fat consumption; and employee cholesterol levels. Following a two-year assessment, worksites in the delayed-treatment condition received a version of the intervention requiring less interventionist time. The effects of this streamlined intervention in these worksites were evaluated relative relative to a third group of 13 quasi-experimental comparison worksites that entered the study at that time.