The son of the 5th Baron Vivian and Victoria Ruth Mary Rosamund (née Oliphant), Nicholas was educated at Ludgrove School, then at Eton College in Berkshire and Madrid University, where he received a diploma in Spanish Literature, History and Culture.
Elevated to the rank of Brigadier in 1987, he commanded the British Communication Zone until 1990, when he stepped down.
In 1991, Vivian succeeded to his father's titles and joined the House of Lords, where he was Shadow Minister for Defence.
He had one son, Charles (7th Baron Vivian) and one daughter, Henrietta (married to Philip Hoyland.
Children: Harry, Jemima, Olivia, Florence) and Camilla (married to William Wallace.