[4] Chirilov has played in the national championships of Moldova, Romania and Iran, at clubs like Zimbru Chișinău, Rapid București, Sportul Studențesc, Zob Ahan.
[5] Sergiu Chirilov has the UEFA "PRO" lincense for coaches.
[6] In 2007 – July 2008, he was the second coach at the Moldova U-21 national football team.
From 2008 to 2010 he was the head coach of the Moldova U-21 national football team, obtaining in his debut match a victory of 1–0 against Germany U-21.
Since 19 June 2013 he has been the head coach of the second team FC Zimbru Chișinău.