From the General Botha Old Boys Association Muster List
After G.B. Cadet with Blue Funnel Line for 3 years, obtained Second Officer’s Certificate in 1955.
Then sailed as Third Officer with Safmarine and Bullard King Line.
1956 – 1969 with the Royal Air Force as Flight Navigator, rank of Flight Lieutenant.
Then flew as Navigator with Air Lingus for one year and with South African Airways for 10 years during which time obtained a degree in maths & physics with the University of South Africa. As a top student obtained a bursary to do a honours course at the University of Cape Town in Astrophysics.
1979 obtained a bursary to do a D. Phil at Oxford Univesity, completed in 1983.
Taught at Univesity College London for 2 years and then became a Principal Systems Engineer with Racal Avionics for 2 years.
1987 became a Senior Lecturer in Aeronautics at London Guildhall University.