is a Scottish former professional footballer who played as a midfielder. He is currently the set-piece coach at Everton. Prior to that, he was the manager of EFL League Two club Fleetwood Town.

Adam started his senior career with Rangers. He spent much of his early senior career on loan to Ross County and St Mirren. While on loan to St Mirren during the 2005–06 season, Adam was part of the team that won both the Scottish Challenge Cup and First Division, playing in over thirty matches for the Saints. Upon returning to Rangers at the end of the 2006 season, he became a regular under managers Paul Le Guen and Walter Smith. Adam was also part of the Rangers team that reached the 2008 UEFA Cup Final.

After falling out of favour at Rangers during 2008–09, Adam was loaned out to English Championship side Blackpool. The loan was made permanent at the start of the 2009–10 season, and Adam became an integral part of the Blackpool side, captaining the team to a play-off victory over Cardiff City which resulted in their promotion to the Premier League. Adam shone in his first season in the Premier League, his performances being recognised with a nomination for the PFA Players' Player of the Year in April 2011; however, Blackpool were relegated the following month, and he transferred to Liverpool in July.

After one season at Anfield, Adam joined Stoke City in August 2012 for a fee of £4 million. He spent seven seasons with Stoke, making 179 appearances, before joining Reading in July 2019. Adam returned to his boyhood club Dundee in September 2020. He captained them for two years and led them to promotion to the Scottish Premiership.

Adam played at under-21, B and full international levels for Scotland.