Chartered aeronautical engineer, England Engineer, British Aircraft Corporation, Warton, England, 1958-1963. Control and systems engineer Naval Weapons Center, China Lake, California, 1968-1970. Lecturer control and systems University Cambridge, 1970-1975.
Professorial fellow Australian National University, Canberra, 1975-1981. Professor, head department environmental science University Lancaster, England, 1981-1987, director Centre for Research on Environ Systems, since 1987. Director quantitative environmental science and technical University Lancaster Development Company, since 1982.
International Business Machines Corporation visiting professor University Ghent, Belgium, 1980.
Author: Environmental Water Quality, 1982, Recursive Estimation, 1984/84. Editor: Modelling in Biotechnology, 1983. Contributor numerous articles to professional journals.
Whitworth fellow United Kingdom Department Education and Science, 1965, fellow Clare Hall, Cambridge University, 1970-1975, Royal Society Arts, 1983.