The existence of many databases in organisations (especially in human resources management departments), has led to data mining techniques being applied in this research as a tool to embark on one of the most important issues of management in human resources management, namely, workforce recruitment. In other words, the effective factors will be identified in employees’ performance by discovering covert patterns of the relationship between employees’ test scores and their performance at work. This will provide a decision-making tool for managers to use during the recruitment process.