[13] Koch was named as Man of the Match for the 2023–24 EPCR Challenge Cup final, as the Sharks defeated Gloucester to claim the title.

[14] In 2013, he was included in a South Africa President's XV team that played in the 2013 IRB Tbilisi Cup[15] and won the tournament after winning all three matches.

[16] In July 2015, Koch came off the Bench for the Springboks in an uncapped game against a World XV at Newlands Stadium in a 46-10 Win.

In 2016, Koch was included in a South Africa 'A' squad that played a two-match series against a touring England Saxons team.

[17] He was named in the starting line-up for their first match in Bloemfontein,[18] but ended on the losing side as the visitors ran out 32–24 winners.