Some organizations seek to promote informal work-related learning to stimulate organizational performance. This study focuses on six types of work-related learning in relation to personal, relational, and work characteristics of the workplace practice. A survey was conducted to identify types and levels of work-related learning for executive Dutch police officers in terms of intentionality, developmental relatedness, and interaction partner's professional practice and hierarchical position. Analysis of the data found that police officers frequently learn from their peers and together. They learn from new and less-experienced colleagues infrequently. Of the nine characteristics of workplace practices researched in this study, some seemed to individually facilitate work-related learning; in particular, the individual's value of work-related learning, possibilities for collegial feedback, and a relatively high level of work pressure seemed to stimulate informal work-related learning. Implications of the findings for HRD research and practice are discussed. (Contains 4 tables.)