In 1982 Fr Aidan Lehane was appointed Principal of the Senior School until 1991. Fr Galvin became the 1st President of the Past Pupils' Union in 1986. In 1991 while the Senior Cup Team were defeated in the final against Clongowes, the Junior Cup Team won the first title against Clongowes. The following year (1991–92), Fr Willie Bradley was appointed Principal of the Senior School. Ms Mairéad Burke was appointed Principal of the Junior School 1992–93. Fr Lehane was appointed manager of St Michael's later that same year. In 1993–94, St Michael's celebrated its Golden Jubilee.