Nkomotana began his career as a Practicing Attorney with Mankoe Incorporated in 2000, representing clients in both the public and private sectors. He moved on to the Department of Health as Senior Manager: Procurement, where he was responsible for overall strategic management, and compliance with the PFMA and other relevant legislation.

Nkomotana then served as Company Secretary and Legal Advisor to the Polokwane International Airport, Municipal Manager of the Waterberg District, and as Acting Senior General Manager in the Policy and Planning Coordination Unit in the Office of the Premier.

In 2009 he became Head of the Department of Cooperative Governance, Human Settlements and Traditional Affairs in Limpopo Province, responsible for the strategic leadership of 30 municipalities, and the Headmen, Senior Traditional Leaders and Kings in the province.

He progressed to become MEC responsible for this department and later an MP in the Limpopo Provincial Legislature. Nkomotana served on the SABC Board from 2010 to 2011. In 2014, he focussed again on the legal sector, serving his pupillage with the Johannesburg Bar of Advocates until his admission to the Bar. He currently practices as an Advocate with the Duma Nokwe Group of Advocates.

Previous boards include:- 
SABC board 2010 to 2011