| Company | Timeline | Status | |
| Rainbow Ultrasonics Limited Director • Director | 13 Mar 2013←12 Years→Current | Active | |
| Rainbow Engineering Services Limited Director • Engineer | 17 Mar 2010←15 Years→Current | Active | |
Dustbubble Trading Ltd Director • Engineer | 3 Apr 2008←10 Years→24 Jul 2018 | Dissolved | |
| Autoswitch Electronics Limited Director • Engineer | 26 Aug 2006←19 Years→Current | Active | |
| Rainbow Medical Engineering Limited Director • Engineer | 6 Feb 2006←19 Years→Current | Active | |
