Scougall won the SFL under-19 League in 2010–11.[2] After playing youth football for Hibernian and Dunfermline Athletic, Scougall made his senior debut for Livingston on 16 October 2010 as a substitute in a 4–1 win against Stenhousemuir in the Scottish Second Division,[3] making two further appearances that season as Livingston sealed the Second Division title.[4] Scougall became a regular for the West Lothian side the following season in the First Division,[5] and was rewarded with a new long-term contract in September 2012, designed to keep him at Almondvale until the summer of 2016.[6] Scougall's performances for Livingston saw him attract the attention of scouts from Arsenal and Swansea City,[7] and in April 2013, Scougall was one of four players to be nominated for the Scottish First Division Player's Player of the Year award for the 2012–13 season.[8]
Sheffield United
In January 2014, Scougall joined English club Sheffield United, signing a three-and-a-half-year deal,[9] for an undisclosed fee.[10] Scougall made his debut for United in a FA Cup tie against Fulham on 26 January, coming on as a half time substitute.[11] Scougall's first goal in United colours came on 8 February 2014 against Shrewsbury Town at Bramall Lane.[12] Scougall was part of the Sheffield United team that reached the FA Cup semi final, played at Wembley Stadium, and scored Sheffield United's second goal in a 5–3 defeat at the hands of Hull City.
Scougall was released by Sheffield United in May 2017.[13]
St Johnstone
On 17 June 2017, Scougall signed a two-year deal with St Johnstone.[14]
Carlisle United
Scougall signed for Carlisle United on short-term deal on 31 January 2019 after being released by St Johnstone. He was offered a new contract by Carlisle at the end of the 2018–19 season.[15] He signed a new one-year contract with the club in June 2019.[16]
On 8 October 2012, Scougall was named in the Scotland under-21 squad for two friendly matches against the USA and Canada,[18] and duly made his debut on 12 October 2012 against the USA.[19] Scougall was once again named in the Scotland under-21 squad to face Greece in February 2013 but withdrew from the squad due to injury.[20] Scougall's impressive form at Sheffield United earned him a recall to the Under-21s for a 2015 Under-21 Euro Qualifying match against the Netherlands on 28 May 2014,[21] where he went on to make his second appearance for the under-21s as 75th-minute substitute in a 6–1 defeat.[22]