After Transkei was merged into South Africa following the end of apartheid, Sigcau became a minister in the cabinets of Nelson Mandela and Thabo Mbeki until her death.
There she joined the African National Congress Youth League (ANCYL), then graduating with a BA degree majoring in Anthropology and Psychology.
This she believed was the reason why she found it difficult to secure a post as a teacher in the Eastern Cape,[4] as a result she taught in a number of schools in Natal during the 1960s.
Matanzima cited Sigcau and Chief JD Moshesh's affair as a breach of code of conduct for the reasons to recall her from public office.
This came after Holomisa accused her government of corruption, alleging that Sigcau received bribes in exchange for gambling rights.
While she denied these allegations, she conceded to accepting a bursary worth R50 000 from an official in order to pay for her daughter's tuition.
President Nelson Mandela appointed her as Minister of Public Enterprises in 1994 and she served in that role, which involved attempts at transforming the face of South African Airways and Transnet until 1999.