External roles and appointments: 

    • Combustion and Fuels Committee of ASME International Gas Turbine Institute 1991- 2012.
    • Chair, Rolls-Royce Powerplant Installations and Noise Panel 2004-2008
    • Chair, I.Mech.E./Roy.Aero.Soc. Propulsion Technical Committee 2005-2008.
    • Chair, Rolls-Royce Propulsion & Power Systems Advisory Board 2008–2013
    • Independent Scientific and Technical Adviser, MoD 2007-2013.
    • Organiser IMechE Seminar 'Propulsion Systems for Unmanned Aircraft' 2005.
    • Member of Planning Committee Roy. Aero. Soc. International Powered Lift Conference 2008.
    • Organiser Roy. Aero. Soc. Workshop ‘Progress on Open Rotor Technology’ 2012.
  • External Examiner (Undergraduate courses):
    • Imperial College (Aeronautics) 1993-1996.
    • Manchester University (Aeronautical Engineering) 1997-2000.
    • Imperial College (M.Sc. Advanced Mech. Engineering) 1998-2002.
    • Bath University (Aeronautical Engineering) 2001-2004.
    • Leicester Univ. (M.Sc. Advanced Mechanical Engineering) 2001-2005.
    • Nottingham University (Mechanical Engineering) 2005-2008.
    • Bristol University (Aeronautical Engineering) 2005-2008.
    • Cambridge University (Engineering) 2008-2011.
    • Trinity College (Dublin) (Mechanical Engineering) 2010-2014.
  • External Examiner (PhD degree):
    • Cambridge University, Cranfield University, Imperial College, Leeds University, Leicester University, Nottingham University, Manchester University, Oxford University, Queen Mary and Westfield, Queen’s University (Belfast), R. M. C. S. (Shrivenham), Surrey University, Sussex University, UMIST, Warwick University