William Tumai

Based in Auckland, William is a practising lawyer with strong ancestral ties to Waikato and Ngati Porou. Born in Putaruru and raised in Wharekahika (Hicks Bay) on the East Cape, he brings a deep connection to his Māori heritage into his legal work.

William joined Blackwood Montagna in September 2025 as Special Counsel.

With considerable experience and expertise in Criminal, Civil, and Family Law, William has also developed a particular specialisation in Relationship Property Law focussing on Contracting-Out and Section 21 Separation Agreements.

William’s Master of Social Sciences (Hons) degree was in Political Science. His Bachelor of Social Sciences (Hons) degree was in Public Administration and Public Policy. He also holds the NZLS Legal Executive Certificate.

Demonstrating interest in the latest developments in the tech world and their intersection with the law, William’s LLM specialised in Artificial Intelligence.

William is a “straight shooter”, known and valued for his direct, approachable style and commitment to face-to-face engagement with clients.

His dedication to justice, community, and client service, paired with his broad legal knowledge and practical mindset, make William a big asset to the practice and its clients.