- Borehole Engineers Gwynedd
- Borehole Engineers Bala Gwynedd
- Borehole Engineers Bangor Gwynedd
- Borehole Engineers Barmouth Gwynedd
- Borehole Engineers Bethesda Gwynedd
- Borehole Engineers Blaenau Ffestiniog Gwynedd
- Borehole Engineers Caernarfon Gwynedd
- Borehole Engineers Criccieth Gwynedd
- Borehole Engineers Dolgellau Gwynedd
- Borehole Engineers Ffestiniog Gwynedd
- Borehole Engineers Harlech Gwynedd
- Borehole Engineers Nefyn Gwynedd
- Borehole Engineers Porthmadog Gwynedd
- Borehole Engineers Pwllheli Gwynedd
- Borehole Engineers Tywyn Gwynedd
- Borehole Engineers Clwyd