[2] In 1988, Koziol began his professional career with the Maryland Bays of the American Soccer League.
In the 1989 season, the Bolts played in the American Professional Soccer League.
On November 4, 1990, Koziol signed with the Hershey Impact of the National Professional Soccer League.
In 1996, he played for the Central Jersey Riptide of the USISL Pro League.
[7] On July 17, 1996, the MetroStars called up Koziol for an exhibition with the Italian U-23 national team.