Katjimune joined student politics at Jan Mohr Secondary School when he was recruited into the
Namibia National Students Organisation (NANSO). In 2015, he set up the first ever NANSO branch at Jan Mohr Secondary School, at a time when the school was dominated by a history of apartheid and anti-activism. He was elected the Branch Chairperson in 2015. In 2016, he was elected to the NANSO Khomas Regional Executive Committee (KREC) as the Regional Secretary for Political and Internal Affairs. During his years at the University of Namibia, he served as the Faculty Representative for the Faculty of Humanities and Social Sciences, the Spokesperson of the SRC as well as the SRC Speaker of Parliament. He joined mainstream politics in 2018 when he joined the PDMYL and was subsequently appointed as the National Spokesperson of the PDMYL. In September 2019, he was nominated as part of
McHenry Venaani's 5 candidates to form part of the PDM's list to the National Assembly at the age of 21, thus becoming one of the youngest candidates ever to be nominated to a party list for the National Assembly. He was initially placed number 22 on the PDM list, and the PDM only attained 16 seats hence he was initially not sworn in as a member of the National Assembly on 20 March 2020. He then worked as a Researcher and Speechwriter for the PDM Parliamentary Caucus from June 2020 to May 2022, whereafter he was sworn in as a Member of the National Assembly on 6 June 2022 at the age of 24 following a Supreme Court judgment regarding the PDM list. ==References==