An attachment theory perspective of mentoring is presented to explain the degree of functionality of a mentor-protege formal match in an organizational setting. By focusing on Bowlby's (1969/1982) behavioral system of attachment and its triarchic taxonomy of secure, avoidant, and anxious-ambivalent attachment, previous conceptualizations are expanded by illuminating relational concepts that mentors and supervisors could use to facilitate employee learning and development. A short attachment style assessment and a mentor-protege(e) attachment style pairing guide are presented. (Contains 2 tables.)