Stewart is Deputy Westminster Group Leader and Economy Spokesperson.
Stewart was born in Dundee in 1963. He was educated at Brackens PS, Invertay PS Monifieth, Carnoustie High School, and Bell Street Tech (now Abertay University) where he gained an HD in Computer Studies.
Stewart worked in IT / IS for 20 years, and ran his own business. A highly experienced political campaigner, Stewart was the SNP's first Youth Convener and spent four years as the Party's National Secretary before being elected as the Organisation Convener in 2003.
Stewart contested the Dundee East Westminster seat in 2001 delivering a 5% swing to the SNP and slashing the Labour majority by 5,500 votes. He has a young daughter, Morag, and lives in the constituency where he was elected as MP for Dundee East on 5 May 2005, taking the seat from Labour.