Kociniak also had main and secondary roles in films such as Morning Stars (1979), Danton (1983), Fucha, Bermuda Triangle (1987), Circus is Leaving (1987), Yesterday Goodbye (1993), Sir Thaddeus (1999), Kalipso (2000), and The Last Action (2009), as well as in television series such as Janosik (1974), Jan Serce (1981), Sukces (1995), and The Deep End (2013).

During the German occupation in World War II, his home was burned down, and his family took shelter in an abandoned brick factory.

[2] He has graduated from the engine manufacturing vocational school, and in 1958, from the Aleksander Zelwerowicz National Academy of Dramatic Art in Warsaw.

He also had main and secondary roles in films such as Morning Stars (1979), Danton (1983), Fucha, Bermuda Triangle (1987), Circus is Leaving (1987), Yesterday Goodbye (1993), Sir Thaddeus (1999), Kalipso (2000), and The Last Action (2009), as well as in television series such as Janosik (1974), Jan Serce (1981), Sukces (1995), and The Deep End (2013).

There, he co-hosted together with Andrzej Zaorski sketch comedy segments titled Kulisy srebrnego ekranu, in the radio show 60 minut na godzinę, and performed the theme song of programme Powtórka z rozrywki.