| Company | Timeline | Status | |
| Data Sciences Limited Director • Director | 15 May 1997←1 Year 3 Months→1 Sep 1998 | Dissolved | |
| IBM United Kingdom Trust Director • General Manager | 8 May 1997←1 Year 3 Months→25 Aug 1998 | Liquidation | |
| International Business Machines Limited Director • Chief Executive | 25 Feb 1997←1 Year 6 Months→25 Aug 1998 | Active | |
| IBM United Kingdom Limited Director • Chief Executive | 25 Feb 1997←1 Year→25 Mar 1998 | Active | |
| IBM United Kingdom Holdings Limited Director • Chief Executive | 25 Feb 1997←1 Year→25 Mar 1998 | Active | |
