He will initially focus on PaySauce becoming the leading payroll provider for Australian dairy farms.
Returning Kiwi Kip Hanna was Westpac Fiji chief executive.
Employment lawyer Carl Blake joined DLA Piper in 2021.
Jen Bunbury is also chair of Oyster’s Audit and Risk Committee.
Geoffrey Summers will take up the role for a three-year term.
Margot Gatland has been acting head since November.
Experienced executive David Kidd takes up the role on August 9.
Education leader Rosanne Graham started as chief executive on July 1.
Sam Sutherland, Michael Vanner, and Katrina Wood have been made partners of the firm.
Half the new partners and associate partners are based in regional NZ locations.