Rajneesh Kumar Mahajan, born on August 5, 1960, is a retired Indian Administrative Service officer from the 1987 Bihar cadre. He holds a graduate degree in Commerce and a postgraduate degree in Business Administration. Throughout his career, he served in various capacities including District Magistrate, Additional District Magistrate, Director, Sub-Divisional Officer, Private Secretary, Executive Director, Joint Secretary, Principal Secretary to Government, and Secretary. His most recent position was Additional Chief Secretary and Principal in the Human Resources Department, starting from October 23, 2018. Mr. Mahajan has contributed extensively to the administrative framework of Bihar during his tenure.