[2][3] He matriculated in 1992 and in 1994 he enrolled in a public management degree at the University of the North at Turfloop,[4] where he joined the South African Students Congress.
In his account, he was assaulted after he raised a point of order because Ngrayi Ngwenya, the pro-Mabuza chairperson of the ANC's Ehlanzeni region, "was speaking when another speaker was on the floor"; he said that he was then punched and kicked by Ngwenya and by Bheki Mhlongo, a bodyguard of Thulisile Khoza, then the Mayor of Nkomazi.
[5][9] After he joined the EFF in 2013, Sedibe became the party's head of organising and campaigns in Mpumalanga,[9][10] and in January 2014,[6] he quit his job in the provincial government.
[12][13] In January 2017, Sedibe was involved in planning a political demonstration which he described on Facebook as "a land occupation programme which will take place between White River and Hillsview".
[14] On 29 January, the day of the demonstration, he was arrested with an EFF local councillor, Cyril Chuene; they appeared in court on charges of trespassing, incitement to public violence, and a violation of the Regulation of Gatherings Act.
[15] However, a week later, Sedibe was arrested again, immediately after he and another EFF legislator, Alfred Skhosana, were ejected from the legislature for disrupting Premier Mabuza's State of the Province address.
[17][18][19] In the 2019 general election, the EFF displaced the Democratic Alliance as the ANC's official opposition in the provincial legislature;[20] Sedibe was again ranked first on the party list and was re-elected to his legislative seat.