William Cheruiyot Sigei (akaberekwa musi wa11 Gumiguru 1969 mumusha weCheboi'ngong', kunze kwemusha weKapsimotwo, Bomet, Kenya) aimbova mumhanyi wemuKenya akamhanyisa IAAF World Cross Country Championships muna 1993 na1994
. Muna 1994 akaisa rekodhi itsva yenyika pamamita 10 000 muOslo nemaminitsi 26:52.23.