Having joined the Civil Service in 1952, Bloomfield was appointed Permanent Secretary to the power sharing executive in 1974. After the collapse of the executive, he went on to become Permanent Secretary for the Department of the Environment (D.o.E.) and the Department of Economic Development, and finally Head of the Northern Ireland Civil Service on 1 December 1984. In that capacity, he was the most senior advisor to successive Secretaries of State for Northern Ireland and other Ministers on a wide range of issues. He retired from the post in April 1991.[3]
Since retiring from the NICS, Bloomfield has embarked on a life of involvement in a diverse range of organisations. He has taken up roles such as Chairman for the Northern Ireland Legal Services Commission and his alma mater, the Royal Belfast Academical Institution. He has also been involved in the political reform of the States of Jersey and spearheaded the Association for Quality Education, which fought to retain academic selection in the Northern Ireland education system.[1] In December 1997 he was asked by the then Secretary of State for Northern Ireland, Mo Mowlam, to become the Northern Ireland Victims Commissioner for a fixed term. His role was to produce a report on the way forward for Victims issues in Northern Ireland. His report entitled We Will Remember Them was published in April 1998. From 1991 to 1999 he served as the BBC's National Governor for Northern Ireland.