Thabani is currently the Non-Executive Chairman of Tyme Bank Holdings Limited and Tyme Bank Limited, a director of UViRCO Properties (Pty) Limited and a member of the Specialist Committee on Company Law.

He was previously the Chairman of Acsion Limited and Chairman of the Acsion Remuneration Committee. He is a past member of the Legal Resources Trust.

He joined Nedbank Group in October 2011 as Group Executive responsible for Governance and Compliance and a member of Nedbank Group Exco. He was also responsible for Ethics, Sustainability, Nedbank Group Editorial, and Language Services and was the Group Company Secretary. He retired from Nedbank Group on 31 January 2019.

Thabani was formerly Executive Chairman of PricewaterCoopers (Southern Africa), a Deputy Judge President of the High Court of SA (Natal Provincial Division) and a Judge in the Competition Appeal Court. He was the Chairman of the Competition Commission Enquiry into Bank Charges and the National Payment System from 2006 to 2008. Previously, Thabani led the Commission of Enquiry which investigated corruption, nepotism and maladministration in the Department of Correctional Services.

Thabani has had varied exposure in his roles in addition to the ones mentioned above, namely Pan African Mining Development Company, National Business Initiative, Kwa-Zulu Transport Services Corporation, BUSA Toyota (a joint venture with the McCarthy Group). He gained over 20 years experience in the legal profession as an attorney, a mediator, an arbitrator and later a judge.