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Key Personnel

Geology Manager


ohn Roiko has more than 30 years’ experience as an exploration geologist comprising 15 years with CRA Exploration, the compliment of his career has seen him acting in many positions in senior exploration managerial roles. John has the typical great Finnish work ethic, combined with knowledge and experience, and SIG is proud to have him on its team. Recent roles have included the design and implementation of approximately 9,000m of resource identification RC and oriented diamond core drilling at the Anduramba Porphyry Molybdenum deposit in SE Queensland.

John’s advantage to SIG lies with his versatility and breadth of experience. In recent times he has advantaged numerous companies in these ways.
He established a resource company (ERD Pty Ltd) targeting titanium and iron resources in the Northern Territory. He was instrumental in managing a number of extensive exploration campaigns which resulted in a comprehensive pre-feasibility study with resultant project divestment to a Chinese consortium. Small scale mining of the ilmenite resources commenced in 2014.
John led a team that offered opportunities to explore indigenous lands; guidance was necessary to allow negotiations with indigenous owners; results focussed on the rapport established with communities that had as its database – fair results for all.

John is an experienced Senior Geologist with a wide and varied experience base incorporating accountability for design, implementation and technical supervision of grass roots through to mine-phase exploration and development programs in a spectrum of geologic terranes.

He is also a Fellow of the AusIMM.