The professional competency includes the necessary knowledge and skills to be possessed by any professionals. It is crucial in case of LIS professionals also. These competencies are based on the values of the organization and not only sharpen the ability of the professional but also contributes to organizational success in the long run. The purpose of this paper is to review the perception, expectations, preferences and current status of two competencies (technical and behavioural) that are required by the library professionals. Technical competencies (sometimes referred to as professional competencies) are the ability of a person to do their job comparatively and on the same level as other professionals in their field. Behavioural competencies (also referred to as personal competencies) encompass knowledge, skills, attitudes, and actions that distinguish excellent performers. This paper is an attempt to map these competencies level among Library Professionals of Panjab University, Chandigarh. The study is based upon the response received by the LIS professionals (library assistants and assistant librarians) for which a structured questionnaire was prepared.