Building supervisor Kory Oxley (left) and tradesman Hayden Tarawa. Credit:Joe Armao and Luis Ascui

A second man has pleaded guilty to stealing lucrative rolls of copper from the Andrews government's signature Caulfield-to-Dandenong sky rail project.

Labourer Hayden Tarawa admitted to stealing six rolls of copper valued at $150,000 from the level crossing removal project in the Magistrates Court on Tuesday.

It comes as former Lendlease building supervisor Kory Oxley faced a committal hearing on Wednesday over his alleged role in authorising a team of sky rail labourers to leave the project and instead renovate the home of another manager.