Kinsella was Opposition Whip (1994–1999) and Deputy Leader of the Opposition in the Senate (1999 – October 1, 2004) when he became Leader of the Opposition in the Senate. On February 8, 2006, he was named Speaker of the Senate by the Governor General on the advice of Prime Minister Stephen Harper. Kinsella speaks French, and uses it in parliament. He resigned as Speaker on November 26, 2014, in anticipation of his mandatory retirement from the Senate, upon reaching the age of 75, two days later.