Will was a career civil servant in Northern Ireland for 35 years. He was Permanent Secretary of the Department of Social Development, and of the Departments of Education and Employment and Learning. He supported the First Minister and deputy First Minister at the time of devolution. He had the same role during the creation of the Northern Ireland Executive. This was during a time when it was developing its Programme for Government. He was also Head of the Policy Profession in the Northern Ireland Civil Service. He continues to support public sector training. He is a Quaker, currently studying and working as a Trustee of the Quaker International Education Trust.