Petri has worked on variety of commodities and deposit types including volcanic-hosted massive sulfides (VMS), iron ore, Cu-porphyry deposits, technology metals, gold and diamonds. Mostly recently he was engaged as Exploration Manager Europe for the First Quantum Minerals Ltd.

Petri is an accreted Chartered Professional of Australian Institute of Mining and Metallurgy (AusIMM), European Geologist (EurGeol), Qualified Person (QP) and SEG Fellow.