Cummins was born in Sydney and attended The Hills Sports High, captaining their first XV in 2010.
[4] Cummins played in the Shute Shield competition with Eastwood, impressing coach John Manenti, who said:[5] Steve Cummins has established himself as a real hard worker with huge involvements at the tackle and breakdown areas.In 2013, Cummins played for the Sydney-based Super Rugby franchise side the Waratahs' emerging side, Gen Blue in the Pacific Rugby Cup.
[6] On 3 June 2014, the Eastern Province Kings announced Cummins as one of three new signings prior to the 2014 Currie Cup Premier Division season.
[8] Cummins started the opening match of the Currie Cup season, but was on the losing side as Western Province secured a 35–16 victory.
Cummins made a total of eight appearances in Eastern Province Kings colours during his short spell in Port Elizabeth.