sentences:  From 1975 to 1976 he worked as the system design manager of the Tornado ADV aviation company and technical coordinator for UKAIR CCIS.From 1975 to 1979 he was head of Integrated sciences in a grammar school, teaching physics, integrated science, mathematics, electronics, biology and astronomy to advanced level, with music, gymnastics and athletics as additional subjects.In 1980 he returned to industry and held posts at two leading systems engineering companies as Marketing Director, Business Development Director and Technical Director.