Their lawyer Chris Cole lodged guilty pleas to a charge of using inside information to bet on an event,which brings the rugby league betting scandal another step closer to being finalised.
Wilson,29,and Trevisiol,31,were in charge of start-up technology platform StatEdge,which formerly had a contract to house information on market-sensitive NRL team lists.
The company collated votes for several Dally M awards categories before last year's ceremony and also had a contract with Rugby Australia.
Police alleged StatEdge chief executive Wilson and managing director Trevisiol placed bets on Melbourne's Bellamy to win last year's NRL Coach of the Year award after being privy to the judges'votes.
Bellamy tallied 52 votes to win the award ahead of runner-up,Manly's Des Hasler (40),court documents allege.
Police claim the bets started rolling in on the opening night of last year's finals series when Wilson and his friends were drinking at a Sydney pub,less than an hour after StatEdge told the NRL the results.