Greminger was a member of the senior men's Hungarian national basketball team.

He was a part of the Hungarian national team, that was eliminated after the group stage of the 1952 Summer Olympic Games.

He was also a part of the Hungarian national team at the 1960 Summer Olympics in Rome, where Hungary finished in 9th place.

[3] He also played with Hungary at the 1964 Summer Olympics in Tokyo, where his team finished in 13th place.

This biographical article relating to a Hungarian basketball figure is a stub.