Mr. Elliott received a Bachelor's degree in Arts in 1976 and a Bachelor's degree in Common Law in 1979, both from the University of Ottawa. He was called to the Bar of Ontario in 1981, and appointed a Queen's Council in 1992.
Mr. Elliott practiced law in Ottawa until joining the Office of the Deputy Prime Minister of Canada in 1988. In that office he played various roles, including Chief of Staff, and provided advice and analysis on a broad range of economic, social and policy issues.
In 1992, Mr. Elliott joined the Department of Justice and was subsequently appointed Head of Legal Services for the Department of Indian and Northern Affairs. Mr. Elliott was appointed Deputy Commissioner of the Canadian Coast Guard with the Department of Fisheries and Oceans in 1998.
In 2000, Mr. Elliott was appointed Assistant Deputy Minister, Safety and Security, at Transport Canada. The Safety and Security Group is responsible for safety and security oversight of all modes of transportation.
Mr. Elliott was appointed Assistant Secretary to the Cabinet, Security and Intelligence, in 2003. In that role he supported the National Security Advisor to the Prime Minister, and was Secretary of the Cabinet Committee on Security, Public Health and Emergencies.
Mr. Elliott was National Security Advisor to the Prime Minister from April 2005 to May 2006, when he became the Associate Deputy Minister of Public Safety.
Mr. Elliott became the 22nd Commissioner of the RCMP on July 16, 2007.