our projects

Our team of specialists have experience in all major infrastructure sectors. We go beyond for our clients, and are proud of what we have achieved.
Find out why below!

Highway 23 Slip Repair

Ask the right questions

Symphony Centre

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

Greville Road Stormwater Culvert

The Greville Road Stormwater Culvert was identified as an Emergency Works project by Auckland Council Healthy Waters after major Auckland floods in January 2023.

Barber Grove to Seaview Wastewater Treatment Plant Pipe Duplication

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

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.

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.

SH25 Ruamahunga

Drones in the air, ropes on the ground and sophisticated models in the office

Auckland Flood Recovery

Our team was on standby for the devastating tropical storm

Design and detailing of the soil – structure interaction for the Main Wharf North project was a considerable challenge for all involved. The ground improvement was required to stabilise the existing fill and alluvial soils, provide the majority of the lateral restraint for the entire wharf and back span slab in a highly seismic zone, all without excessive restraint of thermal and shrinkage actions. Andy and his team provided strong leadership in this complex interface, relentlessly driving efficiency and value in the solution.

Daniel Patten - Engineering Manager, McConnell Dowell

We have worked with Andy and his team for a number of years now and we keep coming back to them as their approach to geotechnical design is always practical and efficient. They do not shy away from challenging designs and will always go that extra mile to make sure their designs are constructable.

Tim Pervan - Engineering Manager, Heron Construction

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 O’Sullivan have provided Abergeldie innovative temporary works designs and geotechnical assessments reducing cost and programme on many of our construction projects.

Andy O’Sullivan are easy to work with and quick to respond to our requests.

Alastair Blackler - General Manager, Abergeldie Complex Infrastructure

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

A O'SULLIVAN & ASSOCIATES LTD | Geotechnical engineering | optimised earlier.