Mennie grew up in Coffs Harbour, New South Wales, but as a teenager he moved to Nelson Bay.

[3] He was signed to the Perth Scorchers in the Big Bash League Twenty20 competition, along with Ryan Duffield in December 2011 to replace the injured Mitchell Johnson and Mark Cameron.

However, he didn't make his Twenty20 debut until October 2012, when he played in the Scorchers opening match against the Titans in the 2012 Champions League Twenty20.

[3] Mennie also proved his usefulness as a lower order batsman with a score of 79 not out, his maiden first-class half-century, against Queensland.

[11] In September 2016, Mennie was named in Australia's One Day International (ODI) squad for their tour to South Africa.

His form in the previous season's one-day tournament was poor, only taking seven wickets with an average of 50.85 and conceding more than 5 runs per over throughout.

He was chosen over one of Australia's more established pace bowlers, Jackson Bird, because of his stronger lower order batting in the Sheffield Shield.

His baggy green cap was presented by Ben Hilfenhaus and Temba Bavuma of South Africa was his first test wicket.

After playing two matches, he was struck in the head with a cricket ball while bowling at training and was admitted to hospital with a "minor brain bleed".

[25] Mennie then returned to Shield cricket and finished the season strongly with figures of 5/67 and 4/21 against Tasmania to take South Australia through to their second final in a row.