| Company | Timeline | Status | |
| O DDRWS I DDRWS Director • Retired | 25 Mar 2015←10 Years→Current | Active | |
| Gwasanaeth Cerdd Ysgolion Gwynedd A MÔN Director • Prifathro Wedi Ymddeol | 12 Feb 2003←22 Years→Current | Active | |
| Gwasanaeth Cerdd Ysgolion Gwynedd A MÔN Director • Unreported | 12 Feb 2003←22 Years→24 Oct 2025 | Active | |
