| Company | Timeline | Status | |
| Cymdeithas Gychod Afon Nyfer Ac Harbwr Trefdraeth Director • Master Stonemason  | 15 Apr 2013←12 Years→Current  | Active  | |
| Cymdeithas Gychod Afon Nyfer Ac Harbwr Trefdraeth Director • Stonemason  | 27 Apr 2009←3 Years→15 Apr 2013  | Active  | |
| Cymdeithas Gychod Afon Nyfer Ac Harbwr Trefdraeth Director • General Builder  | 9 Jun 2006←2 Years 9 Months→30 Mar 2009  | Active  | |
