BIMinNZ Conference 2022 – Meet the Speakers

News from the


In today’s issue of News from the Source, we are profiling more of our BIMinNZ Conference speakers. In our Risk Mitigation Stream, Bob Hall of RJHA Limited and Jason Howden of Warren and Mahoney will be presenting a case study on Archive New Zealand’s new Heka Rua Archives building. They will be followed by Brad Sara of Warren and Mahoney speaking about Christ Church Cathedral Reinstatement, specifically the digital journey undertaken to reduce the risk. 

Archives New Zealand || Tāhuhu: Preserving the Nation’s Memory – A case study of the Heke Rua Archives Digital Twin 

Heka Rua Archives will be a new resilient purpose-built facility in Wellington to house and protect our memory of government and taonga to best practice standards and provide specialist facilities for conservation and digitisation at scale. 

At the outset it was determined to use a Building Information Modelling (BIM) platform that would not only serve the design and construction phases but would continually develop to serve as a platform that would endure and drive the whole of life facilities management strategies that incorporate best fit software, systems, and processes over a 50-year design life. 

The presentation will provide insights as to the vision of the project’s decision makers and introduce delegates to a project of national significance that is going to provide the benchmark for major project development going forward. 

About the speakers: 

Bob Hall FNZIOB – Director, RJHA Limited 

Bob Hall has over 50 years’ experience in the construction industry both in the United Kingdom and New Zealand. Bob joined Fletcher Construction in Wellington in 1980 and served the company for 26 years, including 12 years as the Wellington Business Unit Leader. In 2006, Bob retired from Fletcher and formed RJHA Limited, and has operated as a specialist industry advisor, including construction and property related management roles on several projects. 

Bob has provided mentoring and advisory services to private and publicly funded organisations including WCC, TCC and the PSPIB/CPPIB (Canadian public sector pension funds with property portfolios in NZ) and has acted as an ‘expert witness’ in numerous disputes. 

RJHA were called in after the 2016 Kaikoura Earhquake to assess the damaged Defence Building at 2 Aitken Street in Wellington, to develop a safety risk management plan on behalf of NZ Defence and the building owner, AMP Capital. That work included the salvaging of highly confidential Ministry of Defence materials and equipment, as well as the tenant’s soft fit-out. RJHA were retained to explore options for the now vacant Lot, which included the procuring of a design for the building that was chosen to be constructed on the former Defence Building site, Heka Rua Archives.

Bob is a Fellow and Past President of the NZIOB. 

Jason Howden – Principal / Digital Innovation Leader, Warren and Mahoney 

As Warren and Mahoney's Digital Innovation Leader, Jason has developed new bespoke BIM technologies and processes to deliver many of New Zealand's most important projects, realising both the practice’s and their clients' visions for a better build environment. He is an internationally sought-after expert on technology in the built environment and for over 25 years has been at the forefront of the field of digital technologies and tools for construction, leading its development, promotion and education worldwide. 

He is an innovative and strategic thinker with an extraordinary ability to navigate intricate multi-layered, many-party projects, designing effective technological frameworks and the strategic pathways to realise them. His skill at digitally aligning procurement, design and construction processes is informed by a lifelong immersion in the construction industry.

Christ Church Cathedral Reinstatement – The digital journey to reduce risk 

During the 2010 and 2011 earthquakes there was significant damage to the Cathedral. The West façade facing the Square collapsed, the tower was badly damaged and collapsed, and significant damage occurred elsewhere across the building. The building is still too unstable to enter. 

Christ Church Cathedral is in the process of being reinstated to bring the centre of Christchurch together once again. Reinstating the Anglican Cathedral for the people of Christchurch and future generations is a unique opportunity, and a symbol of hope and confidence restored. 

‘Reinstating’ means repairing, restoring, reconstructing and strengthening. The main Cathedral will retain its appearance and many heritage features, but it will be safer, more flexible, and comfortable, and better equipped for future worship, civic, social, community and hospitality events.

The presentation will explore the journey of the design team and construction team in how to best utilise models and digital technologies to understand, design, document, coordinate and construct this once in a lifetime project. 

About the speaker: 

Brad Sara – Associate Principal / Digital Business Advisor, Warren and Mahoney 

Brad is an Associate Principal at Warren and Mahoney, Digital Business Advisor and Director of Warren and Mahoney Technologies. He has an advanced knowledge of BIM and is passionate about leading its development industry-wide. 

Over the last 20 years he has been engaged on many large and complex projects across Australasia. He leads design and construction teams to brief, communicate, deliver and validate BIM uses and requirements to the full project team. Brad's passion for improving the construction sector is at the forefront of what he does and is reflected in the outcomes he achieves.

To view the full Programme and register to attend, visit

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