Pembridge is currently suspended from London's main board because the US$37.5 million deal for the Minto copper mine in Yukon includes a share handover and counts as a reverse takeover.
Paul Fenby has joined as CFO from Indonesia-focused Asia Resource Minerals.
Pembridge CEO David Linsley said Fenby would be critical to the return to the LSE.
"The role of CFO is a vital one for our company as we move towards closing the Minto transaction and relisting," he said.