Objective job satisfaction questionnaires were administered to more than 26,000 U.S. Marines, as part of the Marine Corps' occupational task analysis of 16 separate occupational groups over a three-year period. Results indicate that intrinsic job factors are more potent than extrinsic factors, both as satisfiers and as dissatisfiers. Satisfaction with present job was moderately related to the decision to reenlist, with two groups of factors dominant: intrinsic factors related to job content; and extrinsic factors related to supervision and fair treatment. Satisfaction with overall career bore a much stronger relationship to the reenlistment decision, than did satisfaction with present job. Results were discussed in terms of possible differences between Marines and civilian personnel in their perception of their jobs. Development of a new job satisfaction instrument for use with future Marine Corps task analysis projects was outlined. (Author)