With more than 15 years of mining industry experience, Grey has previously worked for Mincor Resources, Cyprus Amax Minerals and Norilsk Nickel Australia.
His work in PNG included involvement with the exploration and assessments of the Yandera and April River porphyry systems, Goldminex said.
"The technical and managerial skills he brings to Goldminex, together with his previous PNG experience, will assist the company to achieve its goal of discovering a world-class deposit," Goldminex chief executive officer Sandy Moyle said.
"Kim's expertise in nickel, copper and gold helps strengthen our geological team's capability of both advancing existing projects and testing the numerous other targets identified within our tenement portfolio."
In July Brazilian mining giant Vale struck a $US20 million farm-in agreement with Goldminex over its Owen Stanley Ranges porphyry copper-gold tenements.
Outside of gold and copper opportunities in its exploration portfolio, Goldminex's Wavera project area has evidence of narrow nickel sulfide veining near Iyewe Creek.
Goldminex shares are unchanged at 12.5c this morning.