Barrie Kenneth James George, 69, has pleaded guilty in the High Court in Auckland to charges of bribery and corruption brought by the Serious Fraud Office.
Mr George appeared in court to enter the guilty pleas in relation to his part in alleged bribery and corruption by former employees of Auckland Transport and Rodney District Council.
He pleaded guilty to two representative charges under section 105 of the Crimes Act 1961 totalling $103,580.54.
Mr George was charged in April 2015, together with Stephen James Borlase, and Murray John Noone.
The Serious Fraud Office says Mr George had been employed as an engineer at Rodney District Council since 1974 and then as a senior manager at Rodney District Council and Auckland Transport where he was responsible for leading the delivery of maintenance and renewal works until 2013.
Between December 2005 and June 2013, Mr George admitted to receiving undisclosed payments or gratuities while in various engineering and management roles. The gratuities often came in the form of cash, travel, accommodation and entertainment.
The two remaining defendants are to stand trial later in 2016. Mr George will reappear for sentencing on 1 September 2016.