The basic assumption in Human resource management is that people remain significant to the attainment of performance that an organisation desires. To achieve performance, it is requisite to invest in the competencies of individuals working in the organisation. The investment entails mobilising the necessary interventions to enhance the competencies of organisational workforce towards achieving organisational performance. While efforts have been concentrated on the studies of interventions for enhancing the skill and knowledge which constitute an aspect of individual competency, the other areas of competency as described by competence iceberg model has been largely unattended to. Therefore, this study presents the review of theoretical and empirical literature of the various interventions for enhancing the competencies of employees and organisational performance. Based on the reviewed theoretical and empirical literature, the study proposes a conceptual model that advances knowledge on what constitutes employee's competencies and organisational performance, and their relationship, especially in the field of Human resource management.