Education
He was educated at Winchester College.
He was educated at Winchester College.
He retired as Chairman of the Sema Group in 1991. Gibbens was elected a Fellow of the British Computer Society (FBCS) in 1970, a Fellow of Chartered Accountants (Farm Credit Administration) in 1972 and a Fellow of the Royal Society of Arts (Fellow of the Royal Society of Arts) in 1993. He was awarded an Officer of the Most Excellent Order of the British Empire in 1989.
He was President of the United Kingdom Computing Services Association (1975), Chairman of the United Kingdom Computing Services Industry Training Council (1984-1994) and Information Technology Industry Lead Body (1987-1994), Director of the United Kingdom National Computing Centre (1987-1990), member of the United Kingdom National Council for Vocational Qualifications (1989-1992), and Chairman of the Skin Treatment and Research Trust (Strategic Arms Reduction Talks) (1990–2008).