During his playing career as a defender,[1] he made several appearances for CSKA Sofia, OFI Crete, Metalurh Zaporizhya, Cherno More Varna, FC Baku, Slavia Sofia, Beroe Stara Zagora and Etar 1924 Veliko Tarnovo.

[2] After serving as assistant to Ivko Ganchev at Beroe during the 2012/2013 season, Tomash began his coaching career at Bansko, leading the team for 2 years,[3] before moving to Lokomotiv GO.

[citation needed] On 10 June 2016 he was appointed as manager at the newly promoted to First Professional League team Vereya.

[7] On 10 June 2024, Aleksandar Tomash was introduced as the new head coach of Spartak Varna, who returned to the highest level of football in Bulgaria.

After a very solid start to the season, after which Spartak is in the top form and first positions, and after victories against some of the leaders of league, Tomash leaves Spartak on 27 August 2024, after CSKA Sofia pays his forfeit and brings him as head coach of the team, fulfilling his childhood dream.