After matriculating in 1996, Sikonathi started his career as a messenger at Brait Securities, a stockbroker in Johannesburg. He gradually moved to trading bonds and equities as a junior at the same firm. He then took a position at UBS investment bank as a trade support analyst.
His interest in journalism led him to become a reporter at Media24’s financial publications Finweek and Fin24 in the 2000s. He then covered equities, the industrial sector, and markets for the US financial wire service Bloomberg, before joining Business Day and Financial Mail.
In 2017, he received the Sanlam Journalist of the Year award. In 2020 he was appointed as spokesperson for Eskom on a three-year contract, and joined the News24 team in April 2023.