The company said the new office would help meet growing demand, create new opportunities and increase business efficiency.
Golder managing director Geoff Hurley said he was excited by the move, which builds on the 40-year history for the company in PNG.
"We have a long history in PNG and are excited to start this new chapter," he said.
"When we take on a project in PNG we are supported by more than 1000 Golder employees across Australasia and 7000 worldwide."
Golder said it was excited to be able to offer solutions including ground engineering, environmental and social assessment, natural resources management and decommissioning and decontamination to clients in the oil, gas and mining sectors in PNG.
The company also said it would offer solutions for onshore and offshore facilities for the liquefied natural gas industry while offering the mining industry both open pit and underground solutions for the entire mine life.