Technical communication practice can change rapidly over time and across organizations. As a result, lifelong learning is an important mind-set, yet few studies explore how technical communicators learn on the job. This study builds on research about technical communication training by reporting on learning practices in one documentation team working at a large, multinational corporate information technology firm. Based on interviews and artifact analysis, the authors report on topics, technologies, and learning purposes that the team discussed, finding that peer-led, collaborative learning enables documentation teams to create and sustain group dynamics, an underexplored facet of on-the-job learning.