| Company | Timeline | Status | |
Petch Optimisation And Simulation Consulting Limited Director • Quantitative Analyst | 26 Jul 2013←2 Years 6 Months→26 Jan 2016 | Dissolved | |
| 46/52 Denman Road Properties Limited Director • Operational Research Con | 9 Apr 2002←14 Years→4 Aug 2016 | Active | |
