"Jack was born on 21 September 1948. A passionate activist at all levels of the movement throughout his life, Jack was born in Brent, to Irish parents and brought up in Kilburn. Before entering Parliament in 2010, Jack was one of Britain’s best-known and most respected Trade Unionists. Described as a fierce champion of his members and working people, he rose to prominence in the 1970s leading the historic Grunwick Strike for Union recognition... 33 years a member of the T&G, he was elected Deputy General Secretary in 2003 and was then the Deputy General Secretary of Unite; 30 years a member of the Labour Party, he was elected to the National Executive Committee as Treasurer of the Party in 2004; He was elected Secretary of both the Trades Council and the Tenants and Residents Federation; He founded the second Community Law Centre in Britain... Jack is married to the Deputy Leader of the Labour Party, Harriet Harman, they have three children."
- Chair, All-Party Parliamentary Group on Migration 
- National Advisory Panel, Centre for Labour and Social Studies