Key Staff

 Greg Hackney

Greg Hackney

Greg is a Director and Senior Principal with EDG Consulting based in Brisbane.  A Chartered Professional Engineer, a Registered Professional Engineer in Qld and Fellow of the Institution of Engineers, Australia, Greg is a Geotechnical Engineer with over 25 years’ experience in the consulting engineering industry.  Greg’s obtained BEng and MEngSci degrees at UNSW.  In 2015, Greg, together with Ian Shipway and Garth Powell founded EDG Consulting.  Greg’s areas of expertise include:

  • Design management, focussing on the integration and collaboration of geotechnical design teams with civil and structural design disciplines to deliver project outcomes.
  • Geomaterial assessment for use in engineering projects.
  • Slope engineering and remedial works designs.
  • Soft ground engineering.
  • Earthworks.

Greg has authored or co-authored many technical papers on a range of subjects. 

Notable major projects that Greg has been involved with include:

  • Cross River Rail, where he was part of the team to deliver geotechnical advice relating to support of excavations for the eight shafts and two dive structures.
  • Sunshine Coast Airport Expansion Project where he led the design of temporary bunds for dredge spoil containment.
  • Gateway Upgrade North and Kingsford Smith Drive projects where he provided temporary works design and review.
  • Sarina Range Reconstruction Works where he led the design and provided review for remedial works following damage from Cyclone Debbie.
  • Geotechnical Manager for the RangeConnect bid for the Toowoomba Second Range Crossing project from 2014 to 2015.
  • Project Manager and Project Director for the emergency works and reconstruction works on the Warrego Highway - Toowoomba Range from 2011 to 2014.
  • Project Director for the Gateway Upgrade Project 2007 to 2009.
  • Design Manager for the Kapit Coffer Dam studies 2009 to 2010 and 2011 to 2013.
  • Geotechnical Manager for the Port of Brisbane Motorway Upgrade ECI tender in 2010.
  • Geotechnical Project Manager for the Shannon Creek Storage Facility dam embankment and access road in 2007.
  • Project Manager for the landform construction and old landform evaluation studies for the Penrith Lakes Scheme from 2001 to 2003.
 Garth Powell

Garth Powell

Garth is a founding Director and Senior Principal with EDG Consulting based in Brisbane.  An RPEQ with over 50 years in the industry, Garth has worked in many organisations and roles.  His strengths relate to developing high quality engineering solutions for complex problems and both conceptual and detailed levels, with particular expertise in the areas of dams, mining and mine infrastructure, slope stability and remediation.  Garth has held key roles within government departments, major consulting companies and on projects, demonstrating his abilities to manage groups and obtain results.

Whilst having particular expertise in the areas mentioned, Garth’s experience is wide and varied.  After starting at the State Rivers and Water Supply Commission in Victoria in 1968, Garth worked in contracting, consulting and academic organisations until 1980, when he took a role with the Hong Kong Government.  Over 13 years, Garth progressed to Director level.  He ran the Landslide Preventative Measures program for 5 years, including the direct management of over 100 staff to undertake studies to identify and investigate unsafe slopes and retaining structures, design of remedial works, preparation, and tendering, letting and managing contracts to undertake remedial works.

In 1994 Garth returned to Australia, working as a consulting engineer with a number of organisations.  He held roles including Geotechnical Manager, GM Technical Development and Regional Manager for North Asia and Northern Australia.  In 2012, Garth established his own company and consulted to a number of organisations, before being a co-founder of EDG Consulting.

Notable projects Garth has had key roles in include:

  • Project Director and senior reviewer for the Kapit Coffer Dam and seepage cutoff studies between 2009 and 2016.
  • Studies into the causes of the failure for a major landslide on the South West Transport Corridor, Brisbane.
  • The Wivenhoe Spillway Upgrade, comprising design and construction services for an additional spillway (fuse plug) and associated strengthening of the existing spillway and dam wall.
  • The Inner Northern Busway, comprising a major tunnel through the centre of Brisbane involving tunnelling, top down cut and cover and demolition of portions of an underground car park.
  • Circle Line, Singapore, as the geotechnical design manager for the detailed design of 870C section of the Circle Line mass transit system.
  • Reviewer for temporary bund designs for dredge spoil containment for the Sunshine Coast Airport in 20117 and 2018.
  • Review of temporary works for Gateway Upgrade North and Kingsford Smith Drive from 2016 to 2018.

Garth has authored or co-authored 26 technical papers on a range of subjects.

 Ian Shipway

Ian Shipway

Ian Shipway is a Senior Principal and Director at EDG Consulting.   He is a graduate of the University of Adelaide, a Registered Professional Engineer in Qld, a Chartered Professional Engineer and a Fellow of the Institution of Engineers, Australia.   His geotechnical experience spans more than 35 years with consultancies including Golder Associates and Coffey where he was a Senior Principal for his last seven years of service up to 2015.   Ian’s technical work has required the practical application of soil and rock mechanics to a diverse range of projects within Australia, New Zealand, PNG and Asia.   Ian’s current practice is mainly focussed on civil infrastructure and mining infrastructure and comprises:

  • Development of geological/geotechnical models.
  • Slope engineering, slope risk assessment/management.
  • Studies associated with natural hazards.
  • Working with contractors and site owners to engineer practical temporary works solutions.

Ian’s past technical management roles range from Project Director to Technical Lead, and include projects such as the Port of Brisbane Motorway (1999 to 2001) Gateway Upgrade (2006 to 2007) and the Cunningham’s Gap Emergency Works (2010 to 2013).   He is also currently active in technical committees with both Standards Australia and the International Standards Organisation.

Notable projects Ian has had key roles in include:

  • Cross River Rail, where he led the team for ground model development for the eight shafts and two dive structures.
  • Slope risk assessments in accordance with RMS’s slope risk methodology for the Warrego Highway at Marburg and Toowoomba, within Lamington National Park and on Sarina Range.
  • Kuranda Range Slope Stabilisation project near Cairns where Ian was the Engineering manager for design of rock slope support and risk management measures.
  • Eton Range Rehabilitation project near Mackay, where Ian is the Contractor’s Geotechnical Representative.
  • Yarwun Residue Management Area where Ian led the team Lead for the characterisation and development of anisotropic strength model for stiff fissured clay foundation for the dam.
  • Several national parks in Queensland including Teewah Beach, Moreton Island, Kondalilla Falls, Mt Tibrogargen, Mt Beerwah and Inskip Point where Ian carried out quantitative risk assessment from slope instability and development of management strategies.

Ian has written or co-authored seven technical papers on topics ranging from risk based design to innovative delivery methods for civil infrastructure.

 David Cunliffe

David Cunliffe

David is a Chartered Professional Engineer and a Registered Professional Engineer of Queensland. He has over 13 years’ experience in the geotechnical industry, working as a consultant in the UK and Australia. 

David graduated in 2006 with a Bachelor’s degree in Civil Engineering from the University of Manchester, and then worked in the UK for three years, before completing a Masters degree in Soil Mechanics at Imperial College.  After graduation, he moved to Australia where he spent the majority of his time up to early 2016 with a specialised geotechnical consultant. 

David is an Associate and has developed a well rounded understanding of geotechnical engineering, with particular expertise in:

  • Shallow and deep foundation design.
  • Retaining walls and systems.
  • Temporary works design.
  • Construction phase advice and assessment.
  • Geotechnical investigation.

Moving to EDG in early 2016, he has focused on transport infrastructure projects and established himself as a trusted advisor to clients, delivering practical temporary and permanent works design solutions and construction phase advice.

Roles on significant projects that David has held include:

  • Western Roads Upgrade in Melbourne where David provided geotechnical review and direction for bridge foundation designs.
  • Gateway Upgrade North and Kingsford Smith Drive projects where he led the team in providing temporary works design and review.
  • Eton Range Realignment Project, near Mackay, where he provided site based geological mapping, temporary works and engineering advice.
  • Toowoomba Second Range Crossing project tender the RangeConnect tender where David was the lead bridge foundation design.
  • Toowoomba Range Second Crossing Pre Tender Site Investigation where David was the field manager.
  • Ararat Wind Farm, Victoria where David carried out the geotechnical foundation design.
  • Bridge foundation design lead for the from 2014 to 2015.
 Adam 2

Adam Lander

Adam is a Principal in our Melbourne office, and leads all technical and operational aspects of the office. Adam is a Chartered Professional Engineer with over 20 years’ experience in the geotechnical industry, working as a consultant in Australia and throughout southeast Asia, ranging from specialist geotechnical work through major project design delivery to contractor’s in-house design teams.  Adam graduated in 1996 with a Bachelor’s degree in Civil Engineering from the University of Melbourne and completed a Masters degree in Engineering Geology at Imperial College, London in 2004.  Adam’s particular areas of expertise include:

Deep Excavations 


Temporary Works Design

Rock Mechanics

Ground Improvement

Ground Movement Assessment

Adam has held the following significant project and organisational roles:

West Gate Tunnel Project in Melbourne where Adam led the detailed design for the geotechnical aspects of the project.

NorthConnex deep tunnels and large span Y junctions in Sydney Adam led the geotechnical design.

High Speed Rail study where Adam was the geotechnical lead.

Infrastructure alliance and D&C projects projects in Melbourne, including M80 Upgrade, South Morang Rail Extension, Regional Rail Link where Adam was the geotechnical lead or lead reviewer.

Geotechnical Manager for Gammon Construction in Singapore.

Ground Engineering and Sciences NSW team leader for major multi-disciplinary firm.



 Jo-Anne Perrett

Jo-Anne Perrett

Jo is a Principal Geotechnical Engineer with 20 years of experience in geotechnical and multi-disciplinary investigations and design for a wide range of infrastructure projects. Jo graduated from QUT in 1999 and has worked in geotechnical consulting in both Australia and Canada.  Jo is experienced in planning and execution of geotechnical investigations using a variety of techniques, carrying out various levels of design, preparation of design drawings, specifications and tender documentation, and providing review during construction. 

Jo has specific expertise in:

  • Dam and levee engineering and design.
  • Geotechnical investigation and site characterisation.
  • Shallow and deep foundation design
  • Soft ground and ground improvement
  • Slope stability.
  • Slope stability.

Notable projects that Jo has been involved with include:

  • Brisbane International Cruise Terminal, Port of Brisbane where Jo directed geotechnical work for the BICT project from late 2018 through to end 2019.
  • Port West, Port of Brisbane, where Jo carried out the technical direction for surcharge design and monitoring for portions of the Port West development.
  • Burdekin Falls Dam where Jo was involved in the geotechnical investigations, scope of work statements and risk management workshops relating to dam safety.
  • Rossendale Dam Christchurch, NZ where Jo was involved with the assessment of liquefaction, consolidation settlement, foundation design, and treatment of dispersive soils.



 Steve Perrett

Steve Perrett

Steve is a Principal Geotechnical Engineer with 21 years’ experience in the field of geotechnical engineering, analysis, design and construction for hydroelectric, marine and civil infrastructure projects.  Steve graduated from QUT in 1998 and has worked with a range of geotechnical consultants in Australia and overseas.  Steve spent 12 years working in Peru and then Canada before returning to Australia in 2018.

Steve is a Chartered Professional Engineer and RPEQ whose technical strengths include:

Pile foundations.

Assessment of geotechnical properties of soils and rock for site characterisation.

Soil and rock slope stability and stabilisation.

Dams and water conveyance structures.

Retaining wall design.

Notable projects that Steve has been involved in include:

Allison Project - coal terminal upgrade in Vancouver, Canada.

LNG Canada Kitimat where he was technical Lead for a $15M ground improvement field trial for an LNG processing and associated wharfs / ship-loading facilities in Canada.

Port of Brisbane Motorway Alliance, Brisbane where he was involved in the tender and detailed designs for the AU$196M project.

Edmonton to Gordonvale where he was the geotechnical lead during tender for the successful design and construct tenderer.