Relatively few studies have attempted to assess the external validity of business games. A S-year longitudinal study examined interpersonal, career-success-related factors not previously considered Within-team peer assessments of various playing/behavioral factors displayed by players were compared to their later career mobility, satisfaction, and salary levels. Significant relationships existed between a player's influence on the team's decision-making process, leadership, esteem and value to the team, and the person's later income levels and salary increases. All interpersonal group factors were significantly related to the person's current position or job title. These results, when combined with the results of an earlier study relating a player's economic performance to career success, led to the conclusion that external validity may exist for business games.