Gichia Njau was employed by Teachers Service Commission (TSC) in 1993. He has served as a teacher in various schools before his appointment as a Deputy head of institution and later head of institution. He joined TSC secretariat in 2019 as a Sub County Director. He is currently serving at TSC headquarters, Staffing Directorate as an Assistant Director(SNE).

He holds a Master of Education (M.Ed.) degree, Special Needs Education and Bachelor of Education (B. Ed), Special Needs Education, both from Kenyatta University. In addition, he holds a Diploma in Education, and a Diploma in Educational Administration from Kenya Education Management Institute (KEMI)