On 14 August 1999 the club played their first ever match as a senior football team. The match was at home to Bangor in the Irish League First Division and the result was a 3–3 draw which saw Institute come from behind. The first victory of that season was a 1–0 win away to local North-West rivals Limavady United. A visit from Armagh City at the end of the season saw a massive 7–0 victory for Institute, with top scorer Roddy McDowell going down in the record books for scoring the club's first ever senior hat-trick (he actually scored four on the day). Institute ended the season in 6th place.