Jacek Gmoch (born 13 January 1939 in Pruszków) is a former Polish footballer, who later became a trainer and selector of the Polish National Team.
While having a successful football career he graduated in communication from the Warsaw University of Technology. Gmoch begun playing for Znicz Pruszków, to move on for a successful career in Legia Warsaw. With Legia, he won the Polish Cup twice (in 1964 and 1966) and contributed to the beginning of the successful 1968–69 season. He also became a player for the national Team of Poland (29 caps).
Following a major injury in a friendly match, Gmoch began a coaching career, starting in Legia Warsaw in 1969–71. Having been offered the assistant's job at Kazimierz Górski, he lasted from 1971–74. Moved to U.S. to follow his scientific career (1975–6). He returned to qualify the National Team to 1978 Mundial in Argentina (fifth place). He later moved to Norway in 1979 and Greece until 2003 where he became one of the most successful and recognised coaches.
Jacek is a Polish given name of Greek origin coming from Hyacinth, through the archaic form of Jacenty. Its closely related equivalents are: Jacinto (Spanish and Portuguese), Giacinto (Italian) and Jácint (Hungarian).
The name Hyacinth (Jacek, Jacinto, Giacinto, Jácint) might refer to: