Biello began his professional soccer career in 1992 when he was drafted by the Montreal Supra. A year later, the team folded and Biello signed with the newly formed expansion team, the Montreal Impact of the American Professional Soccer League. Biello helped the Impact capture the League Championship for the first time in 1994, but Biello played a small part in capturing the Championship. In 1997, Biello helped the Impact win the regular-season title by scoring 8 goals and recording 10 assists. He was awarded the Giuseppe-Saputo Trophy as the Impact's Team MVP. In addition to playing for Montreal during the outdoor season, Biello also spent two seasons, 1995–1997, with the Buffalo Blizzard in the National Professional Soccer League. In 1997, the Impact entered the NPSL. Consequently, Biello played both indoor and outdoor seasons with Montreal.