Office: 1300 884 198

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BRISBANE      |      PORT MACQUARIE      |      NEWCASTLE      |      MELBOURNE

Duane Nielsen

Sydney Geotechnical and Sonic Manager, Duane has a background in drilling operations in the mines, as a driller, operations Manager and WH&S Officer over his career. He has joined Terratest as the new Sydney Operations Manager for both Geotechnical and our national sonic operations. 

Jon Maguire

Formerly of the RMS Geotechnical team. Jon Maguire is the manager of our difficult access operations in Sydney along with Terratest's geotechnical team. This includes Non-destructive Digging (NDD), pavement sampling well installations and setting up fencing compounds for drill sites. 

Wade Smith 

Borehole Imaging and UAV surveying. Wade is our resident geophysicist and manager for both our borehole imaging and UAV operations. 

Marten Sweeney 

NSW Environmental and Groundwater specialist. Marty has been with Terratest since 1992 and has extensive experience in soils and materials testing as a NATA laboratory manager. in the past 5 years he has introduced independent CPT testing services to Sydney. Marty is a partner in the Terratest Group. 

Simon Hamilton 

After 16 years experience as driller and manager in Sydney, Simon has taken on the management of our Melbourne and Brisbane operations. Simon's experience in geotechnical, environmental, groundwater and geothermal drilling gives him a complete understanding of site investigation drilling. Simon is a partner in the Terratest Group.

Jason Tucker

Jason is a partner and manager of our Newcastle office. After 28 years with Terratest he is an expert in Geotechnical and Environmental drilling. The Newcastle office has developed a real expertise in mine void drilling. Jason also manages our rig based in Port Macquarie. 

Dave Coleman

Dave is a partner and manager of our Brisbane office. Dave is renowned as one of the best drillers in Australia, and has been with Terratest for 15 years. In addition to managing the Brisbane office, Dave also runs our Water Bore division.

Duane Nielsen

Operations Manager

E: duane@terratest.com.au

M: 0418 131 743

P: (02) 9637 4199

Jon Maguire

Manager Technical Services

E: jon@terratest.com.au

M: 0468 952 248

P: (02) 9637 4199

Wade Smith

Borehole Imaging and UAV Operations 

E: wade@terratest.com.au

M: 0408 723 340

P: (02) 9637 4199

Marten Sweeney

Partner and Environmental Manager

E: marten@terratest.com.au

M: 0412 272 953

P: (02) 9637 4199

Simon Hamilton

Partner - Victorian Manager

E: simon@terratest.com.au

M: 0418 131 743

P: (02) 9637 4199

Jason Tucker

Partner and Newcastle Manager

E: jason@terratest.com.au

M: 0412 272 953

P: (02) 9637 4199

Dave Coleman

Partner and Queensland Manager

E: dave@terratest.com.au

M: 0429 987 271

P: (02) 9637 4199