Sydney-based Gilbert + Tobin announced Friday it was acquiring Perth alliance partner Blakiston & Crabb Lawyers. The acquisition of the 31-lawyer firm will give Gilbert + Tobin an office in the capital of Western Australia’s booming mining industry and take its headcount to over 300 lawyers.

Blakiston & Crabb, established in 1984, primarily advises on matters relating to the energy and resources industry, including mergers and acquisitions, corporate governance and litigation. It entered into an alliance with Gilbert + Tobin last June. The full-fledged merger will become effective June 1.