His reign as acting vice chancellor was characterised by massive structural development which gave rise to the utilisation of the 2013 Needs Assessment funds of Tertiary Education Trust Fund (tetfund) that financed for the constructions of additional male and female hostels, Post Graduate Students Hostel and other developmental structures.
Upon his return in October 2008, he became the pioneer Dean of Student Affairs – a position he held until July, 2014 when he was elected by the Senate of Umaru Musa Yar'adua University, Katsina to serve as the deputy vice chancellor (administration).
In his tenure as the dean, he was the first to enroll the first set of graduates from Umaru Musa Yar’adua University, Katsina for the National Youth Service Corps (NYSC in 2009).
Professor Sunusi Mamman attended different conferences and workshop across the globe including NUC (2009), Daventure Global Ltd Dubai (2015) entitled: Dynamics of Administration, Leadership and technology for organisation's success; Centre for economic reform initiatives Abuja, {2015} University of Dayton USA an International workshop on Research and Development and Innovation (2015) Administrative College of Nigeria Badagry-Capacity for Leadership Development.
In addition to that, he sponsored staff for international conferences to orientate them on global practices to enhance service delivery in the university.