Marciniak represented the US at the 1995 World University Games held in Fukuoka, Japan in August and September 1995. The team had a record of 5–1, securing the silver medal. The USA team won early and reached a record of 5–0 when the USA beat Yugoslavia. In the semi-final game, the USA faced Russia. The team was behind much of the first half but managed to tie the game at the half. The USA broke the game open in the second half and won 101–74. The gold medal match was against unbeaten Italy. The Italian team started strong, scoring 12 of the first 14 points of the contest. Sylvia Crawley scored eight consecutive points to end the first half, but that left the USA nine points behind. The USA took a small lead in the second half, but the team from Italy responded with a ten-point run, and won the game and the gold medal by a score of 73–65. Marciniak averaged 2.9 points per game.