In recent years workplace stress has been seen as an important occupational health and safety problem and probation officers in New Zealand have been identified as suffering from increasing perceptions of stress. Accordingly, the present study was undertaken with a sample of 50 New Zealand Probation Officers in three offices to examine the relationship of individual, organisational and work stressors with work related strains. It was predicted that work stressors would be positively related to strains and that individual differences (e.g., age or gender) would have a moderating effect on the relationship between stressors and strains. The results showed that stressors caused by organisational problems, such as role boundary and overload, were related to strains, more strongly than job content problems, such as difficult clients. Secondly, age may have a curvilinear relationship to strains. Thirdly, the office, or place of work, moderates the stressor strain relationship.