As a scholar at Paarl Gimnasium, he earned a call-up to the Western Province squad for the 2012 Under-18 Craven Week competition. At the completion of the Craven Week tournament, he was named in the South African Schools side that played a three-match tournament in August 2012.[2] He started all three of South Africa's matches against France, Wales[3] and England,[4] helping South Africa to victories in all three matches.
In 2014, Schickerling was included in the South Africa Under-20 side that participated in the 2014 IRB Junior World Championship.[7] After playing off the bench in their first match of the competition against Scotland, he got promoted to the starting line-up for their remaining pool stage matches against New Zealand[8] and Samoa.[9] He also started their semi-final match as they secured a second victory over New Zealand during the tournament[10] and was also named in the run-on side for the final against England.
In 2016, Schickerling was included in a South Africa 'A' squad that played a two-match series against a touring England Saxons team.[14] He was named in the starting line-up for their first match in Bloemfontein,[15] but ended on the losing side as the visitors ran out 32–24 winners.[16] He was named on the bench for the second match of the series, coming on as a second-half replacement in a 26–29 defeat to the Saxons in George.[17]