At international level he was a three-time competitor at the IAAF World Cross Country Championships, running in 1981, 1986 and 1987, and his best finish there was 114th. He represented his country on home turf in Warsaw at the 1987 IAAF World Cross Country Championships, placing 145th overall and helping Poland to 17th in the team rankings alongside Krzysztof Wesołowski, Bogusław Mamiński, Jan Huruk, Sławomir Gurny, and Andrzej Malicki. Psujek ran in the 1987 World Championships marathon later that year, but failed to finish. He also ran at the 1987 European Cup 10,000 m, placing 6th, and the 1988 European Marathon Cup, placing 33rd.