 He was the member of the Stowarzyszenie Pisarzy Polskich and Rotary Club, as well as the vice-president of the international association "The James Joyce Foundation", and since 1973, a member of the Irish Institute.Słomczyński was the author of crime fiction published under the pen names Joe Alex (or Józef Aleks) and Kazimierz Kwaśniewski.As Joe Alex he authored film scripts, stage plays and TV plays, in particular, for the TV .