We move 'mountains'
by optimising geotech, earlier.

let's talk

© McConnell Dowell Constructors Ltd

our expertise

We start each problem from first principles, assess what is to be built and study how the ground will respond.

value engineering / optimisation

tunnelling

ground improvement

slope engineering

deep basements / foundation

temporary works

about us

We approach every problem from First Principles to really understand the ground  and anticipate how it will respond to what is to be built.  That gives greater certainty. For us – and for our clients. Want to know more about Andy O’Sullivan?

Andy

Andy

Sergei

Sergei

Michael

Michael

Raymond

Raymond

Ben

Ben

Ain

Ain

Arman

Arman

Ri Hong (Cyrus)

Ri Hong (Cyrus)

Hui

Hui

Ohnmar

Ohnmar

Kurtis

Kurtis

Sofia

Sofia

Catherine

Catherine

Co

Co

Iris

Iris

Rajitha Sachinthaka (Sachi)

Rajitha Sachinthaka (Sachi)

Paul

Paul

Caroline

Caroline

meet the team →

projects

We go beyond for clients, we move mountains, we uncover secrets. Our team is proud of what we have achieved. Find out why here.

Highway 23 Slip Repair

Highway 23 Slip Repair

Ask the right questions

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Symphony Centre

Symphony Centre

An optimised retention solution that was music to the contractor’s ears

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Barber Grove to Seaview Wastewater Treatment Plant Pipe Duplication

Barber Grove to Seaview Wastewater Treatment Plant Pipe Duplication

This project involved installing a new 1.2km-long, one metre diameter pressurised wastewater pipeline.

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SH25A Taparahi Slip Remediation

SH25A Taparahi Slip Remediation

McConnell Dowell with joint venture partner Fulton Hogan and designers Beca and Tonkin+Taylor completed the new Taparahi Bridge and reopened State Highway 25A in record time.

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Mairangi Bay Pump Station

Mairangi Bay Pump Station

The existing Mairangi Bay pump station could no longer cater for the new development in the area and was overflowing onto nearby beaches.

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Andy has been able to bring specific knowledge from previous projects in Auckland, therefore with Andy and his team, we were able to optimise some design elements. By involving Andy O’Sullivan in the early stages of the design they were able to add value to the project.

Francesco Saibene - Project Director, Ghella Abergeldie JV

We have worked with Andy and his team through the past two earthwork seasons on a number of challenges that have been encountered within our project. From stabilisation of large cut slopes in challenging ground. The solutions have been realistic, reasonable and constructable and a real ‘value add’ has been having some of our team regularly working out of Andy’s offices in true collaboration.

Phil Millership - Engineering Manager, Fletcher Acciona JV

Over the past two and a half years, Andy and his team have consistently delivered innovative and efficient design solutions to a wide range of complex, geotechnically related, challenges on the City Rail Link Project.

Nigel McCreight - Engineering Manager, Auckland City Rail Link, Link Alliance

Andy used cutting-edge software to design an ‘underground pipe bridge’ through a major landslide. To our knowledge, this solution has never been constructed before and saved over two years of project delays and millions of dollars.

Andy Corbett - Commercial Director, Pipeline & Civil Ltd

The Andy O’Sullivan team developed the design for the temporary works as part of the Barber Grove ECI. This included several aspects of geotechnical design from retaining structures to specialist considerations associated with TBM works. The AOS team provided practical and progressive solutions in a demanding geotechnical environment and as a result, the well-considered designs bought real value to the project.

Daniel Crichton - Senior Principal Engineer, Downer Group