Namatai holds a BSc Honours Mining Engineering from the University of Zimbabwe and Masters in Strategic Management from Chinhoyi University of Technology. He started his mining career with Bindura Nickel Corporation in January 1992 at Trojan Nickel Mine as a graduate trainee.  He was appointed to Technical Assistant (March 1994 – February 1996) then promoted to Shift Boss (March 1996 to April 1996).  In May 1996 he left BNC to join Buchwa Iron Mining Company (BIMCO) as Mine Captain for the Buchwa West Pit in Zvishavane.  In March 1997 he was promoted to the position of Production Mining Engineer for the Limestone Mine in Redcliff.  In April of 1998 he was further promoted to the position of Pit Superintendent before being appointed Mine Manager for the Limestone Mine in October 2000 and held this position until July 2006.  He joined Zimasco in August 2006 as Manager Middle Dyke and was later transferred to Shurugwi Division in October 2006 as Surface Mines Manager. He was transferred from Shurugwi to Kwekwe Division as Business Value Planning Manager in January 2008. Namatai moved in acting capacity to the position of General Manager North and Middle Dyke in September 2010 before being substantively appointed to the position in February 2011. In August 2013 he was appointed to the position of General Manager Mining. In April 2018 he was appointed General Manager Smelter (Kwekwe Division). In March 2022 he was appointed Chief Operations Officer.