Previous research has indicated that the transfer climate of work organisations is an important factor in determining the degree to which knowledge, skills and abilities gained in training transfer to the workplace. In particular, workplace social support from supervisors and coworkers is consistently cited as an important factor that can facilitate or inhibit training transfer. However, research evidence regarding the impact of workplace social support on training transfer is mixed. In order to address this issue a study was conducted to identify under what conditions workplace social support impacts on training transfer. This study evaluated a workplace drug and alcohol training programme to examine the impact of workplace social support and identification with workplace groups on training transfer. Results indicated that the influence of workplace social support on training transfer was moderated by the degree to which trainees identified with workplace groups that provided this support. This study supports the proposition that in order to fully understand training transfer, and to design effective training programmes, training research and practice needs to focus on both the personal and situational factors that may interact to influence learning and transfer.