Nielsen, 22 was upgraded to a full South Australian contract this season after a string of impressive performances in 2017 and will take the gloves in place of Alex Carey who is in the Australian Gillette T20 International Tri-Series squad.
He made his List A debut for Cricket Australia’s XI in this season’s JLT Cup, scoring an impressive 94 against Victoria while also taking one of the catches of the tournament against his South Australian teammates.
Nielsen made his first-class debut for the CA XI against England in November, making 20 and taking three catches. He was also involved in this month's one-day tour match, making 40 and taking another three catches.
He also famously stood-in for Quinton de Kock in South Africa’s 2016 tour match against a CA XI side, taking four catches for the match in an unexpected appearance at Adelaide Oval.
The gloveman also made 171 for Premier Cricket club Woodville in first grade early last month, batting at no.3.
Nielsen will make his Adelaide Strikers debut in the semi-final against the Melbourne Renegades on Friday night.