Theory and research from disparate areas were integrated to test if satisfaction with growth opportunities would mediate the influence of job- and company-provided development opportunities on citizenship behaviors and employee burnout. In a sample of professional employees, the results of structural equation modeling provided support for partial mediation. Job-provided development opportunities were significantly related to satisfaction with growth opportunities, which, in turn, was related to the citizenship behaviors of interpersonal helping, personal industry, and loyal boosterism and to the burnout dimension of personal accomplishment. Job- and company-provided development opportunities also had a direct and differential association with forms of citizenship behaviors and burnout dimensions. Implications of the results for theory and practice are discussed. Directions for future research are offered.