Sir Brian Alleyne was admitted to the English Bar at Lincoln's Inn, London, on 10th November 1966, and to the Dominica Bar in January 1967. He was elevated to the rank of Senior Counsel in March 1991. He served as a Senator and Attorney General of Dominica during the term of the interim government from June 1979 to January 1980, and again from 1985 to 1990.
Sir Brian practiced as a barrister at law in Dominica from 1966 until his elevation to the bench of the Eastern Caribbean Supreme Court in July 1996. His practice covered areas of civil, criminal, constitutional and human rights law, and he was also a member of various public and private sector boards. He frequently contributed to public discourse through newspaper articles and speeches, panel discussions and public debates.
He was the Member of Parliament for the Mahaut constituency from June 1980 until June 1996, when he resigned to take up his judicial appointment. He was also very active in Church ministry, particularly through the Marriage and Engaged Encounter movements for many years until his departure from Dominica in July 1996. While in government he held several ministerial appointments and represented Dominica at many international conferences, including the General Assemblies of the United Nations and the Organisation of American States.
He was a member of the Executive Committee of the Commonwealth Parliamentary Association for the Caribbean, Americas and Atlantic Region. He served as Leader of the Opposition in the Parliament of Dominica, and was a member of the Commonwealth Observer Group at the first multi-party elections in 1995 in Tanzania. He was the Political Leader of the Dominica Freedom Party in 1995/1996.
Sir Brian served as a High Court Judge in Grenada from 1996 to 2002, and in St. Vincent and the Grenadines until August 2003, when he was appointed to the Court of Appeal. He served as acting Chief Justice of the Eastern Caribbean Supreme Court from March 2005 until his retirement from the bench in April 2008, at which time he returned home to Dominica.
While at the Bar Sir Brian was active in the local Bar Association as well as in the Organisation of Commonwealth Caribbean Bar Associations. He was also a director of the Caribbean Human Rights and Legal Aid Company, and spent much of his professional time on pro bono work. He is married with three adult children.