City workers walking across a street


Mercer is the only KiwiSaver provider to have been awarded a Platinum rating for seven years running for delivering value for money by SuperRatings^.

Mercer (N.Z.) Limited has been helping New Zealanders manage their retirement savings for over 60 years. We are experienced superannuation and KiwiSaver specialists in New Zealand, with local knowledge and expertise, and global reach.

Many of New Zealand's largest employers have chosen Mercer for their workplace superannuation schemes and many more as preferred KiwiSaver provider. This means we handle the administration, investments, member communications, Helpline and other services in relation to the retirement savings of tens of thousands of New Zealanders.

^'SuperRatings' does not issue, sell, guarantee or underwrite this product. Go to for details of its ratings criteria.


Martin Lewington

Managing Director of Mercer (N.Z.) Limited

In December 2016, Martin was appointed Country Corporate Officer of Marsh & McLennan Companies, New Zealand, driving business strategy across all operating companies in New Zealand. Martin has been CEO of Mercer NZ since 2009, and is responsible for the firm’s Wealth, Health and Career businesses.  Martin has also held senior roles with Mercer in investment management and investment consulting businesses since joining Mercer in 2006.

Martin has 30 years’ experience in corporate advisory consulting. Prior to Mercer, he worked for a boutique investment bank, PricewaterhouseCoopers and EY. His background covers a range of consulting projects in New Zealand and the United Kingdom including Treaty of Waitangi settlements, corporate finance projects, investment consulting, privatisations and financial planning.

Martin holds a Master of Science from the London School of Economics, a Bachelor of Business Studies from Massey University, is a CA member of the New Zealand of Institute of Chartered Accountants and a Chartered Member of the New Zealand Institute of Directors.



Sarah Whitelock

Consumer Wealth Leader, Mercer (N.Z.) Limited

 Sarah Whitelock is a Principal and the Leader of the Consumer Wealth business. She is responsible for overseeing the Mercer consumer products including the Mercer KiwiSaver scheme, Mercer Super Trust, and the Mercer FlexiSaver unit trust. Sarah's focus and passion is to ensure that all Kiwis have access to innovative solutions that enable them to make sound long-term investment decisions and to meet their investment goals.

Sarah joined Mercer in May 1998 and in addition to her current role has been involved in superannuation consulting to corporates and trustee bodies, the provision of secretarial services to superannuation boards, along with business and project management. Prior to joining Mercer Sarah gained experience at PriceWaterhouseCoopers and within Local Government in Audit and Financial Accounting roles.

Sarah has a Bachelor of Business Studies (Accounting) from Massey University and is a Member of Chartered Accountants Australia and New Zealand.


Nicky Burns

Head of Administration Operations, Mercer (N.Z.) Limited

Nicky Burns is a Principal and Mercer New Zealand's Administration Operations Leader.

In her role, Nicky leads the service delivery to 30 corporate clients as well as Mercer's Master Trust and KiwiSaver products with combined membership of over 190,000. Nicky’s key focus is driving operational service excellence and ensuring our customers and clients are at the heart of everything we do.

Nicky has been part of the Mercer team for the last 20 years after initially joining the firm as a Fund Accountant, and has over 30 years’ experience in the financial services industry.



Glenys Wilson

Financial Advice and Education Manager, Mercer (N.Z.) Limited

Glenys is the Financial Advice and Education Manager in New Zealand . Since the inception of KiwiSaver in 2007, Glenys and her team have been providing financial advice to Mercer KiwiSaver customers as well as providing financial literacy seminars to our wider customer base.

Glenys is a qualified financial adviser and as well as her work in the KiwiSaver space, Glenys and her team provide financial education seminars,pre-retirement workshops and financial advice to a wide variety of  Mercer and external clients.

Prior to joining Mercer in 2002, Glenys held senior management positions in the banking, investment advisory, personal trust and managed fund sectors.


Toll free: 0508 MERCER (0508 637 237)
From overseas: +61 3 8687 1886
9.00am - 7.00pm

Monday - Friday (NZST/NZDT)

Write to us:

Mercer NZ, PO Box 1849
Wellington, New Zealand 6140

Commercial Bay

PWC Tower, 15 Custom Street West,
Auckland, New Zealand 1010
0508 637 237

Get directions