Mae gan y Prif Gynghorydd Tân ac Achub rôl hanfodol o ran helpu Gweinidogion Cymru a swyddogion i ymdrin â materion sy’n ymwneud â pharodrwydd, perfformiad, strwythur, a threfniadau gweithredol y tri Awdurdod Tân ac Achub yng Nghymru. Y Prif Gynghorydd sydd hefyd â’r cyfrifoldeb cyfreithiol dros arolygu diogelwch tân ar holl safleoedd y Goron, nad ydynt yn rhai milwrol, yng Nghymru, a chaiff ei benodi i’r rôl honno gan Ei Mawrhydi yn y Cyfrin Gyngor o dan Ddeddf Gwasanaethau Tân ac Achub 2004.
The Chief Fire and Rescue Adviser has a vital role in assisting the Welsh Ministers and officials on matters of operational preparedness, performance, structure and organisation of the three Fire and Rescue Authorities in Wales. The Chief Adviser is also legally responsible for inspecting fire safety in all non-military Crown premises in Wales, and is appointed to that role by Her Majesty in Council under the Fire and Rescue Services Act 2004.