Before he joined the National Assembly, Seabi was the provincial secretary of the Limpopo ANC between February 2014 and June 2018. He was the chairperson of the Portfolio Committee on Police from September 2023 to May 2024.
He was appointed as the chief executive officer of the Limpopo Tourism Agency in 2012,[2] but in October 2013 he was suspended with full pay pending an investigation into his alleged non-compliance with the Public Finance Management Act.[3]
During his four-year term as provincial secretary, Seabi was accused on several occasions of using his administrative powers to interfere in internal elective processes. In December 2014, allegations of this kind led a group of ANC members, wearing panties on their heads, to chase Seabi out of a provincial conference of the ANC Women's League;[7][8] on that occasion he was accused of manipulating the electoral process in favour of Joy Matshoge, who was standing against Maite Marutha for election as Women's League provincial chairperson.[9] In November 2016, ANC members protested outside Seabi's office in connection with an upcoming election for the regional ANC leadership in Waterberg.[10]
Meanwhile, the provincial party was preparing for its own elective conference, and Seabi had long been expected to lead a challenge to incumbent provincial chairperson Stan Mathabatha.[14][15] As the provincial conference approached, he was reported to be standing for election as provincial treasurer.[16] However, when the conference was held in Polokwane in June 2018, Seabi was not elected to a top leadership position, nor even elected as an ordinary member of the Provincial Executive Committee;[17] he was succeeded as provincial secretary by Soviet Lekganyane.[18]
In the May 2019 general election, he was elected to a full term in his seat, now as a member of the Limpopo caucus of the National Assembly.[1] After the election, the ANC announced that it would appoint Seabi as its whip in the new Portfolio Committee on Sports, Arts and Culture, chaired by Beauty Dlulane.[22] In late August 2021, he was transferred from the sport committee to the Portfolio Committee on Police,[21] where he also served as ANC whip.[23][24] The committee's chairperson, Tina Joemat-Pettersson, died in June 2023, and on 6 September 2023 he was formally elected to replace her as chairperson.[25]
In the next general election in May 2024, Seabi was re-elected to his seat in the National Assembly, ranked 14th on the ANC's party list for Limpopo.[1]