Mastermyne Group Wins A$255 Million Dendrobium Mine Contract

Mastermyne Group Ltd secured a mining services contract at the Dendrobium underground metallurgical coal mine in New South Wales. The agreement with GM3, a joint venture between Golden Energy and Resources and M Group, potentially generates A$255 million in gross revenue over six years.

The contract begins in September 2026 with an initial two-year term expected to bring in A$85 million, followed by two optional two-year extensions. The project will create more than 140 new roles and expand the company's existing strata consolidation and project services at the site.

This award follows a previous contract the company secured at the nearby Appin mine in mid-2025. The expansion builds on a partnership with GM3 to increase the range of services delivered at the Dendrobium operation.