[1] Sheahan began umpiring Victorian grade cricket in the early 1980s when an injury ended his playing career.
His first match was between Australia and New Zealand at Bellerive Oval, Hobart on 26 to 29 November 1993, won by Australia by an innings and 222 runs, with Michael Slater, David Boon and Mark Waugh scoring centuries, and Shane Warne and Tim May taking 9 and 7 wickets respectively.
[3] Sheahan's other Test match was between Australia and South Africa at Sydney on 2 to 6 January 1994, won by the visitors by 5 runs when Australia failed to reach a target of 117 runs.
[4] Sheahan umpired five One Day International (ODI) matches between 1993 and 1994.
This biographical article related to an Australian cricket person born in the 1950s is a stub.