As careers in training and development (T&D) continue to evolve, almost no human resource development (HRD) research has investigated personality traits in today's T&D occupations, despite evidence linking personality with work success. Toward filling this lacuna, we identified four Big Five personality traits and four narrow traits with content matching T&D competencies. Based on person–career fit theory, we hypothesized that the trait profile would differentiate T&D from other occupations, and the traits would correlate with T&D career satisfaction. From 90,000+ individuals receiving private career transition services, we compared trait scores of 284 individuals in T&D occupations and the others via bootstrapping (5,000 random samples, n = 284, with the same age and gender distributions). The T&D personality profile was significantly elevated, with greatest differences on the narrow trait empathy, closely followed by assertiveness and customer service orientation plus optimism (small difference), and significant differences on Big Five traits extraversion, openness, and agreeableness (small difference), but no difference on emotional stability. T&D career satisfaction correlated significantly with five traits in the profile, most strongly with emotional stability and optimism. Also, emotional stability correlated more highly with career satisfaction for T&D than non‐T&D occupations. The distinctive T&D personality profile raises questions for further HRD research and carries practical value for training and development of T&D personnel.