This study evaluated the actions of 12 departmental “health promotion teams” and the means they used to improve the psychosocial work environment of a metal factory in a 3-year project. The teams included 80 members and were supported by organizational psychologists twice a year. A survey feedback process was applied in the beginning among all 773 employees, including management (response rate 94%). At the end, a questionnaire on perceived changes was filled out (response rate 94%). The teams guided the developmental process and initiated various activities in cooperation with the personnel. The planned activities were mainly directed at improving physical fitness and social climate. The majority of the personnel participated in these activities and were satisfied with them.