Černý has played football in the Czech Republic, Scotland, Bulgaria and Greece for Sigma Olomouc, Hamilton Academical, CSKA Sofia, Ergotelis, Hibernian, Partick Thistle and Aberdeen respectively.Born in Ústí nad Labem, Černý started his career at Sigma Olomouc in 2002, was outstanding player in the youth set-up, but he made only one senior appearance for the club, playing in a 0–0 draw against Příbram on 12 March 2005.[9][10] Černý was the undisputed number one goalkeeper for a period of more than a year and during that time racked up an impressive tally of 32 clean sheets in 57 official games.However, in late 2013, Černý lost his place in the starting line-up due to refusing to extend his contract with the club over lack of payment.[15] He played regularly for Thistle in the early part of the 2015–16 season, and manager Alan Archibald said he was the team's best player during this period.[26] When Černý moved to Scotland in 2007, he spoke little English and after a year of learning the language, enrolled in a Psychology degree with the Open University.