After nearly 30 years Peter Nation will finish up on December 20 this year.
Mr Schlasberg takes over from Sandhya Pillay.
Helen Andrews is promoted to partner and Kate Storer to senior associate.
Greg O'Connor will lead New Zealand's largest vehicle inspection company.
Mattias Strulik joins the group's Wellington team.
He was previously assistant hotel manager (since 2015) and replaces the late Bevan McGillicuddy.
Karin van Selm, who is based in Sydney, had been in her previous role with Rabobank since January 2016. =
He takes over the general manager role from Jonathan Cron, who founded the company with Penny Cron.
Philip Maw has been a partner of the firm since 2011.
They replace Professor Brett Delahunt and Dr David Ackerley.
