"She has led the commission's sector and agency performance group and was a member of the commission's senior leadership team."
It said from 2004 to 2011 she was deputy secretary, operations at the Ministry of Justice.
"In this role she led a significant service improvement programme for New Zealand's courts.
"She was also responsible for the successful implementation of several new jurisdictions and services, including the transfer of the Employment Court, and new tribunals including the Weathertight Homes and Immigration Protection Tribunals.
"She was jointly responsible for developing a package of proposals for criminal procedure simplification, which in conjunction with the resulting Criminal Procedure Act 2011 modernised, simplified and improved criminal procedure in New Zealand.
"From 1993 to 2003 Ms Sinclair held executive leadership roles at the Inland Revenue Department supporting technology and business changes to improve service to taxpayers."
Ms Sinclair said she was very proud to have been in the New Zealand public service and "fortunate to be given the opportunity to work in areas where there were people with ability wanting to make a difference".
"The values of public service were instilled in me by my parents at an early age, and reinforced by the colleagues I was privileged to work with.
"If I've been able to make a difference as a result of the work I've been involved in, then it's really down to the teams that I've been part of and the support I've had from my beloved husband and my family.
"New Zealand has a public service to be proud of, and I've always felt it was my job, in whatever role I happened to be in, to try and make lasting improvements and leave whatever I was responsible for better than I found it."