Groupwork carried out via computer mediated communication (CMC) is now a fact of life in the the workplace. This study investigates the effects of group membership and task experience on asynchronous computer-mediated groupwork. Groups acquiring task experience as groups during weeks one and two performed better on the final task at week three compared to groups in other treatment conditions. On measures of group process and group member reactions, participants acquiring group and task experience spent less time on the group task and expressed more satisfaction with, and confidence in, the final task solution. Implications for the workplace are that practice of computer mediated group tasks in stable groups is advisable. Training and work environments that expose work groups to computer-mediated tasks and provide opportunity and time to work on complex problems, would improve group performance. Subsequent training would focus on facilitating the transfer of skills and knowledge to new contexts. (Contains 24 references.) (Author)