Other Speakers - Session 6


Session 6

Session 6 Paper 1

Blair Davidson


Blair is a chartered structural engineer and is the Bridging and Civil Structures Manager at Holmes Consulting.  He has more than 25 years experience, having worked in NZ and the UK for contractors, consultants and asset owners in the civil and structural engineering field.

For the last 14 years, he has held Designer, Design Manager and Project Director roles on civil structures projects including bridges, tanks and maritime structures.  Notable projects include Transmission Gully PPP, SH20-1 Manukau Link, East Taupo Arterial, SH2-58 Interchange and the North Auckland Line rail duplication.

Blair is Holmes’ Project Director on the Watercare Mangere BNR Upgrade design and construct project, with overall responsibility for the tender and detailed designs and construction phase inputs for the Flow Splitter, Reactors and Clarifiers.

Chris Lenssen


Chris is a chartered structural engineer and is a structural Project Engineer at Holmes Consulting. He has seven years of design experience in infrastructure projects around NZ including bridges, wharves and reservoirs.

Notable projects include Ashley River Replacement Bridge, Vickers to City SH3 Upgrade and the Transmission Gully PPP.  He has also been involved in a number of smaller reservoir projects such as the Patea and Marton Reservoirs.

Chris carried out Design Manager and Design Engineer roles for Holmes on the Watercare Mangere BNR Upgrade design and construct project, with responsibility for design of the Clarifiers and design review for the Flow Splitter and Reactor structures.  He also handled the day-to-day management of the design team for the structural aspects of the project.

Colin Newbold


Sven Harlos



Session 6 Paper 2

Andrew Dallas

MBA, BE (Hons), NZCE

Andrew is Technical Manager of Conslab Ltd and a director of BBR Contech.

Conslab is New Zealands largest specialist concrete flooring contractor constructing around 500,000 square metres of concrete floors and pavements every year, as well as undertaking maintenance, epoxy toppings, placing and finishing services and general concrete construction.

Andrew has previously held positions as National Technical Manager for Allied Concrete, as President of the New Zealand Concrete Society. Andrew was on the board of the New Zealand Concrete Society for almost 10 years. He has been directly involved in the concrete industry for over 25 years initially as a Senior Consulting Engineer for Holmes Consulting Group. Andrew is a recognized leader in the concrete industry, and in addition to his role at Conslab he has contributed to the publication of a multitude of New Zealand Standards and guidance notes, has presented seminars for the NZCS.

Benjamin Browne

Ben is the Manager of the Auckland office and structural engineer at Novare Design.

Ben has eight years post-graduate experience in the design and management of bridges and civil structures.  This experience ranges from concept, tender and detail design of a broad range of road and rail structures.  Ben’s experience includes design of steel and concrete bridges, miscellaneous civil structures (track slabs, overhead wiring structures, retaining walls etc) and culverts.


Session 6 Paper 3

James Mackechnie

James is the South Island plant engineer for Allied Concrete.  He is a chartered professional engineer and has a PhD in civil engineering from the University of Cape Town.  


Session 6 Paper 4

Lucas Hogan

Lucas came to the University of Auckland in 2010 to pursue a PhD, during which time he became heavily involved with research efforts resulting from the Canterbury earthquake sequence.  He completed his studies in 2014 and has since held a postdoctoral fellowship at the University of Auckland where his research has focused on the seismic behaviour of precast concrete connections and the field testing of structures and foundations. 

Rick Henry

Rick is a senior lecturer in the Department of Civil and Environmental Engineering at the University of Auckland. He is currently leading research into the seismic design of reinforced concrete walls, precast concrete structures, and low-damage systems.  He is a member of the technical committee of the New Zealand Concrete Structures Standard (NZS 3101) and has been involved in a working group providing guidance on the critical damage states and residual capacity of buildings in Wellington following the Kaikoura Earthquake. 

Jason Ingham

Jason is a Professor of Structural Engineering in the Department of Civil and Environmental Engineering at the University of Auckland.  Jason’s research interests include seismic assessment and retrofit of unreinforced masonry buildings, seismic behaviour of reinforced and prestressed concrete structures, and sustainable concrete technology.   


Session 6 Paper 5

Rob Presland

Rob is a Technical Director with Holmes Consulting in Wellington, with nearly 20 years’ experience in design, construction and seismic assessment/strengthening of bridge and building structures. He was involved with design technical support during the construction stages and the latter stages of podium strengthening design and construction on the Majestic Centre project.

Hamish McKenzie

Hamish has over 20 years’ experience in New Zealand and the UK, holding the position of Holmes Consulting Wellington Office business manager for the past 11 years. He was involved with the Majestic Centre project from the start, overseeing the seismic assessment, design, peer review and construction phases of the project.

Tane Graham

Tane is currently a Project Manager for Fletcher Construction in Wellington with 24 years’ experience in the building industry and has come from a Carpentry background.  He was the Main Contractor’s Project Manager for the entire length of the 5 year project being involved very early in developing concept methods and programming before overseeing the actual works being constructed once the design was finalised.