From 1977 to 1982, Lord Glenarthur was director of Aberdeen and Texas Corporate Finance Ltd and from 1979 to 1982 for ABTEX Computer Systems Ltd. He was Senior Executive of Hanson plc from 1989 to 1996, Deputy Chairman of Hanson Pacific Ltd from 1994 to 1998 and director of Whirly Bird Services Ltd from 1995 to 2004. He was further consultant to British Aerospace from 1989 to 1999 and President of the National Council for Civil Protection from 1991 to 2003. For the British Helicopter Advisory Board, he was chairman between 1992 and 2004, and is its president since 2004. Lord Glenarthur was director of Lewis Group in 1993 and 1994, was consultant to Chevron UK Ltd from 1994 to 1997 and director of Millennium Chemicals from 1996 to 2004. He was also consultant to Hanson plc from 1996 to 1999 and to the Imperial Tobacco Group plc from 1996 to 1998, chairman of the European Helicopter Association from 1996 to 2003 and of the International Federation of Helicopter Associations from 1997 to 2004, and is governor of the Nuffield Hospitals since 2000. Between 2001 and 2002, he was consultant to Audax Trading Ltd, and director between 2003 and 2005. Since 2001, he has been Commissioner of the Royal Hospital Chelsea, since 2002 director of The Medical Defence Union and since 2005 director of Andax Global.