He left Elit for Spanish side CD Canillas at the age of 17 in 2009.
[2] On 23 March 2012 Sergey joined the Bulgarian B Group side team Bansko.
[3] In June 2014 Georgiev moved from Bansko to the other B Group team PFC Montana.
[4] On 25 September 2014, he scored the winning goal during extra time in PFC Montana's surprising 2:1 victory over CSKA Sofia in the 1/16 finals of the Bulgarian Cup.
[5] On 4 June 2016 he scored a goal and assisted for another one in 2-1 win against OFC Pomorie in the Relegation play-off.