our team

The commitment, experience and ability of our team enables the firm to deal with complex work in addition to our client's day-to-day legal needs.


The Firm

Lockhart Legal was established on 1st October 2009 by Mason Lockhart on his return to New Zealand after working as a Senior Legal Advisor for Heineken International in Amsterdam. In February 2011, Lockhart Legal acquired the practice of Derek Cutting & Co and the practice shifted from Newton to 31-33 Great South Road. Lockhart Legal acquired the practices of David Thwaite in May 2012 and John Sellers in July 2015. In March 2021 the practice moved to Level 1, 7 Owens Road, in Epsom.

In June 2017 Josh Muir joined the firm and injected a new commercial client base. Josh joined Mason as a director and shareholder of Lockhart Legal in April 2019.

The firm continues to enjoy strong organic growth thanks to recommendations and referrals from Mason and Josh’s loyal clients.

Lockhart Legal is committed to remaining small enough to provide personal service, but sufficiently resourced to provide pragmatic legal advice in our main areas of expertise. The commitment, experience and ability of our team enables the firm to deal with both complex work as well as satisfying our clients' day-to-day legal needs.

Kathryn Williams


Kathryn Williams

A BCom from the University of Otago (1998) and an LLB from the University of Auckland (2008) form the foundation for Kathryn’s ten years of legal experience. She is meticulous, diligent and dedicated, and provides excellent legal advice primarily in commercial and estate matters.

A mum through and through, Kathryn enjoys spending time with her husband and daughters, trips on the family boat and coaching a (champion) school netball team.

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