Joining Simsmetal in 1980, working at the lead smelting unit and studying Material Sciences part-time, Stevenson transferred across to Pasminco, which operated zinc and lead mines, refineries and the world’s biggest lead smelter. Stevenson stayed with the Pasminco/Zinifex/Nyrstar mergers until 2010, when he joined Eco-Bat Technologies as technical manager for the Asia region. He left Eco-Bat to fulfill a long-held ambition of providing a specialty secondary lead consultancy — he named it Global Lead Technologies.