Background
He inherited the title from his father, John Sinclair, 1st Baron Pentland, in 1925.
He inherited the title from his father, John Sinclair, 1st Baron Pentland, in 1925.
Wellington College.
After Wellington College, Pentland inherited the title, aged only eighteen. He was admitted to Trinity College, Cambridge, and graduated with Master of Arts in 1929. He was elected President of the Cambridge Union in 1929.
He qualified as a civil engineer (AMICE)
During World War Two he served in the British Army and later appointed Assistant Secretary of the Combined Production and Resources Board, 1944-1945 at Washington District of Columbia Known for his affiliation with the Work of G. I. Gurdjieff, he became president of the American Gurdjieff Foundation upon its establishment in 1953, retaining the position until his death in 1984.
Lord Pentland married Lucy Elisabeth Smith on 11 September 1941. The couple had one daughter, Mary Sinclair (born 21 November 1942).
A transatlantacist, Baron Pentland was a businessman and member of the House of Lords who spent much of his career conducting government and commercial affairs with the United States.