Nehan started as an internal auditor for Scharrighuisen Opencast Mining in 2003. He soon went into operations where he was appointed Contracts Manager at BHP Billiton's Khutala Colliery near Ogies in Mpumalanga. He then acquired his blasting certificate through the DMR, and was appointed area manager in 2005.
In 2007 he was appointed as a director of Scharrighuisen Opencast Mining, a subsidiary of JSE listed Sentula Mining. He then joined MCC group of Companies in 2008 as Operations Manager with the sole focus on developing a footprint in Coal. In 2009 he was appointed as a director of MCC Group of Companies, overseeing all coal contracts.
In 2011 he was approached by Liviero Group to start up Liviero Mining. He joined Liviero Group in early 2012 as Director of Mining for Liviero, heading up the mining company. In 2016 he was appointed Managing Director of Liviero Mining.