| Company | Timeline | Status | |
Xplor Limited Director • Geotechnical Engineer | 18 Feb 1998←1 Year 10 Months→31 Dec 1999 | Dissolved | |
| Pre-Piling Surveys Limited Director • Geologist And Civil Engineer | 31 Jul 1991←34 Years→Current | Active | |
| Pre-Piling Surveys Limited Director • Unreported | 1 Jan 1970←55 Years→24 Nov 2025 | Active | |
