New South Wales’ umpire Claire Polosak will become the first woman to umpire a Men’s One-Day International on Saturday.

Polosak will be one of two on-field officials for the Final of the International Cricket Council Men’s World Cricket League Division Two between Oman and host nation Namibia.

Her fellow members of the NSW Cricket Umpires’ and Scorers’ Association, Paul Wilson and Rod Tucker, have also earned significant international appointments.

Both men have been appointed to the 16-member panel for the league phase of the ICC Men’s World Cup 2019 starting 30 May.

The appointment to the World Cricket League final is another history making moment for Polosak.

In November, the 31-year-old from Goulburn became the first woman to officiate a final of the Women’s World T20 when she was appointed to the semi-final of the 2018 tournament, in the West Indies, between England and India.

Just before Christmas last year, Polosak joined South Australian official Eloise Sheridan as the first two female umpires to officiate together in a professional cricket match on Australian soil, when both women umpired the Women's Big Bash League fixture between the Adelaide Strikers and Melbourne Stars.

During the 2017/18 season, Polosak also became the first female to officiate in an Australian men’s domestic cricket match when the NSW Blues met the Cricket Australia XI, at Hurstville Oval, in the JLT One-Day Cup.

Excellent performances during the World Cricket League tournament, that started on 20 April, earned Polosak her appointment to the final.

"It’s really to do with the partners you work with all the way through," Polosak said.

"Right from my local association – NSW umpires and scorers – as well as parents and my partner, Evan, my husband, without whose support there’s no way I’d be here today.”

The final is the only recognised One-Day International for the Men's World Cricket League in Namibia.

Wilson, who played one Test and 11 One-Day Internationals for Australia, will experience the Men’s World Cup for the first time as an official, Tucker his third.

Tucker played 103 First Class matches, starting his career at the Blues before he made the move south to Tasmania, where he played the majority of those games.

Wilson and Tucker are among five Cricket Australia officials appointed to the Men’s World Cup, in the middle of this year, including distinguished former Australian Test players Paul Reiffel and David Boon.

Former Queensland First Class player Bruce Oxenford is the fifth official. Four of the five are umpires; Boon will act as a match referee during the tournament.

Wilson is the only Australian umpire appointed to the 2019 World Cup from outside the ICC Elite Umpires Panel.

The man affectionately known as ‘Blocker’ has officiated at four ICC tournaments previously including the 2017 Women’s World Cup in England, the Men's World T20 Qualifiers in July 2015, Male Under 19 World Cup in New Zealand during early 2018, and the Men’s World Cup Qualifiers in February that year.

Wilson was appointed as Third Umpire for the Final of the Women’s World Cup in 2017, between eventual champions England and India, at Lord’s.

This season he umpired two of the three Australian domestic finals in the JLT Sheffield Shield and JLT One-Day Cup.

Tucker is now a highly experienced International umpire having officiated 67 Test matches, 78 One-Day Internationals and 35 T20 Internationals.

Sixteen umpires and six match referees will oversee 48 matches during the World Cup.

Semi-final appointments will be announced at the end of the league stage and those for the final will be finalised after the semi-finals.