| Company | Timeline | Status | |
| Robin A. Williams & Co. Limited Director • Naval Architect | 31 Dec 1991←26 Years→7 Feb 2018 | Active | |
| Keel Marine Limited Director • Naval Architect | 31 Dec 1990←11 Years→28 Oct 2002 | Active | |
| Robin A. Williams & Co. Limited Director • Unreported | 1 Jan 1970←48 Years→7 Feb 2018 | Active | |
| Keel Marine Limited Director • Unreported | 1 Jan 1970←32 Years→28 Oct 2002 | Active | |
