Petrus completed his Mechanical Engineering studies as a bursary holder of Mittal and later Iscor. He joined Columbus Stainless in 1994 where he gained valuable experience as a Maintenance Engineer. In 2002 he joined Anglo Platinum’s engineering department at its Polokwane Smelter after which he spent time working as a Project Manager in the private sector. He joined Samancor Chrome in 2007 at the MFC Low-Carbon plant, whereafter he moved to the DC furnaces in 2010 as Process Engineer. He was subsequently promoted to Operations Manager at M3 and M4 at MFC in 2011. Petrus has been in his current position since May 2020.