Our Board



James Giumelli


Chief Executive Officer


James has a civil engineering background with construction, consultancy and geotechnical experience in Australia and the UK. He has overseen the successful delivery of some of the company's largest projects including Wheatstone General Services 3, Gorgon Site Development and WAPET Landing, Utah Point Berth Project, and Ravensthorpe Nickel Project.

As Chief Executive Officer, James is responsible for leading Ertech with a focus on increasing the capacity, operational performance and profitability across all business units. 



Gavin Miller

BCom PostGradDip Business (Law) CPA ACIS GAICD

Executive Chairman


Gavin is a CPA, Chartered Secretary and a graduate of the Australian Institute of Company Directors, with over 20 years' financial and commercial management experience in diverse industries including manufacturing, utilities and civil construction.

As Executive Chairman of Ertech Holdings, Gavin is responsible for corporate strategy and business planning, risk management, compliance, and the financial performance of the Group.



Mick Unger

BEng (HONS) Civil, MIE Aust

Executive General Manager


Mick is a Civil Engineer with over 20 years' experience in civil construction projects.

Mick’s involvement within the Civil Contractors Federation (CCF) demonstrates his enthusiasm and commitment to our industry. It also reflects the high level of respect that he has earned professionally. He has previously served as the CCF WA Branch President and is now a WA Branch board member and is the currently serving National President of the CCF.

As Executive General Manager, Mick leads the Business Development, Engineering and Estimating functions within Ertech.