Professor Chigbu held various administrative positions at the University of Nigeria before his current appointment. They include Coordinator, Certificate, Diploma and B.Sc. (Sandwich) programmes in Statistics and Computer Science (1998 – 2002), Acting Head of Department of Statistics (2002 – 2004), Director of Academic Planning (2009 – 2011), and Chairman of Senate Entrance Board (2009 – 2014). He also served in many committees of the university at various times. Notable amongst these are the membership of the Senate Entrance Board for three academic sessions, the Joint Council/Senate Committee on Endowment Fund (2009 – 2013), Development Committee of Senate (2008 – 2013), Joint Council and Senate Selection Board for Appointment of Vice-Chancellor (2009), the Information and Communications Technology Committee (2004 – 2009) and the Committee on the Formula for the Calculation of Excess Workload of Academic Staff (2004 - 2005). Others are the Research Grant Committee (1996 – 2002), the Scholarship Committee (1996 – 2002), and the Academic Planning Committee (1990 – 1992), all of the Faculty of the Physical Sciences. As part of his Community Service, Professor Chigbu also served at various times as a member of the Board of Governors, University of Nigeria Secondary School (Nsukka Campus) (2004 – 2014), and the Chairman of the Parent-Teacher Association of the same school (2004 – 2009).
