Social Tagging as a decentralized collaborative and collective approach to describe, structure , and share digital objects with user created keywords has become increasingly popular since 2004 . Once evolved from a social bookmarking application service , mea nwhile it is used for several private and corporate purposes. I t is also applicable for e - HRM tasks, e.g. augmenting employees’ profiles and competency models with tags. In this paper we pursue to detect its applicability to support competency acquisition.