during the 2019–20 season. International career In 2007, Katjiukua was called up to the Namibia national football team for the first time ahead of an international friendly against Malawi. He made his debut for Namibia in that match on 6 July 2007 as they defeated Malawi 2–1. He would go on to make two further appearances for Namibia in 2007 against Botswana and Lesotho, both in the 2007 COSAFA Cup as Namibia were knocked out in the group stage. His next appearance for Namibia on 26 March 2008, again against Malawi in a friendly, but did not appear for the national team again until 2011, when he played in a 1–1 draw against Botswana. Katjiukua was part of the Namibia squad during the 2014 FIFA World Cup qualification and appeared in a 1–1 draw against Nigeria on 12 June 2013, where Namibia were praised for their performance despite conceding a late equaliser. He was also part of the Namibia teams for the 2013 COSAFA Cup, where they were knocked out in the quarter-finals, before being knocked out of the plate competition (a tournament for the teams knocked out in the quarter-finals) by Mozambique, a match in which he appeared. and also in the 2014 African Nations Championship qualification, where they were again knocked out by Mozambique, this time on penalties, with Katjiukua having missed his penalty during the shoot-out. Katjiukua was part of Namibia's 2015 COSAFA Cup winning squad, and featured in every game of what is Namibia's first and only international tournament victory to date. On 21 May 2015, he scored his first goal for Namibia in a 4–1 win over Zimbabwe. The final saw Namibia beat Mozambique 2–0 with Katjiukua being praised for his defensive performances across the entire tournament. Following Namibia's success at the COSAFA Cup, Katjiukua remained a regular player for the Namibia, and appeared in every match of their 2017 Africa Cup of Nations and 2018 FIFA World Cup qualification campaigns. As part of Namibia's successful 2019 Africa Cup of Nations qualification campaign, Katjiukua appeared in a 1–0 defeat away to Guinea-Bissau on 10 June 2017 and later a 0–0 draw at home to Guinea-Bissau. He was part of Namibia's provisional 28 man squad for the 2019 Africa Cup of Nations, but was not part of their final squad for the tournament. On 15 November 2019, he scored his second goal for Namibia; a 76th