Sisa founded the Billion Group in 1998 and Rebosis in 2010. Sisa has won various awards: Entrepreneur of the Year Award (2006), Pioneer award (2014), African Business Excellence (2014).
An admitted attorney of the High Court of South Africa, he practised with Jan S de Villiers Attorneys in commercial litigation before joining Eskom for seven years as legal counsel specialising in property and finance.
He is a past president of the South African Council of Shopping Centres (SACSC), and has been a director of the Attfund group, Truworths International and the Construction Industry Development Board (CIDB).
Sisa has single handedly developed a number of regional shopping malls in SA, including Hemingways Mall, Forrest Hill City, Mdantsane City, B.T. Ngebs City and with Abacus Bay West City in Port Elizabeth.

Dr Sisa Ngebulana awards:

1. Entrepreneur of the year (2006)
2. SAIBPP – Property practitioner of the year (2006)
3. Developer of the year (2009)
4. Pioneer Award (2014)
5. African Leadership Excellence (2014)
6. Global C.E.O Excellence award (2017)
7. Businessman of the year (2021)
8. Lifetime Award (2022)
9. Best Construction Leader of the year (2023)
10. Best Property Developer of the year (2023)