From feasibility to realisation, we advise and provide designs for every type and scale of project.
Our expertise in all materials, structural systems and construction methodologies has generated a national reputation for finding better ways to deliver clients’ projects to a high standard.
We’re proud of the diversity of projects we deliver throughout New Zealand, from large industrial and commercial projects through to simple residential alterations, seismic assessments and seismic strengthening.
Our structural engineering expertise extends beyond design and construction. We also provide forensic structural investigations and independent expert witness advice when the cause, extent or responsibility for structural damage or failure needs to be clearly understood.
Our structural team works alongside our geotechnical, civil, environmental and fire teams to identify and leverage our collective expertise on your project.
Client Feedback
“We have found their work to be of high quality technically, and very responsive to our architectural requirements. Their design advice and positivity to suggestions has been excellent. Their delivery has met our programme requirements, and their collegiality in working in our design team with all consultants has been enjoyable. We will have no hesitation in inviting them to provide services to us on other projects.”
Brian Elliott – Designgroup Stapleton Elliott
Our services include
Engineering reviews based on cost-effectiveness and value
Expertise across multi-storey engineered timber, concrete and steel structures
Damage resistant engineering design
Structural reliability and risk analysis
Seismic strengthening
Forensic structural investigations
Independent structural engineering expert witness advice
Frequently Asked Questions (FAQs) – Structural Engineering
What kind of building seismic assessment do I need?
There are effectively three types of building assessment:
- Initial Evaluation Procedure (IEP)
- Initial Seismic Assessment (IEA)
- Detailed Seismic Assessment (DSA)
What is an ISA – Initial Seismic Assessment?
An ISA – Initial Seismic Assessment is a broader process that includes the IEP and any other initial checks (e.g. basic structural drawings, photos, or past reports) to assess seismic risk.
When it’s used:
- As a first formal step under the NZ seismic assessment framework.
- Often used to decide whether a full DSA is required.
Output:
- Consolidated summary of known information.
- Decision point: proceed to DSA or not.
Best for:
- Building owners wanting to understand regulatory risk or prepare for tenant/insurance queries.
- Preliminary compliance checks.
Which assessment do I need?
Which One Do You Need?
| Your situation | Recommended Assessment |
| You want a quick, low-cost estimate | IEP |
| You’re unsure if a full assessment is needed | ISA |
| You plan to strengthen, sell, or finance | DSA |
| Your building may be earthquake-prone (<34% NBS) | DSA (via ISA first) |
What is an IEP – Initial Evaluation Procedure?
An IEP – Initial Evaluation Procedure is a preliminary desktop and visual assessment used to estimate a building’s seismic strength as a percentage of the New Building Standard (%NBS).
When it’s used:
- As a first step to screen older buildings.
- For quick risk profiling and council records.
- Often used for portfolio-wide assessments.
Output:
- %NBS score based on age, structure type, and risk zone.
- No detailed calculations involved.
Best for:
- Older commercial buildings with limited records.
- Clients wanting a fast and low-cost seismic overview.
What is a DSA – Detailed Seismic Assessment?
A DSA – Detailed Seismic Assessment is a comprehensive engineering analysis that models the building’s seismic behaviour in detail using calculations and site-specific data.
When it’s used:
- If ISA or IEP suggests <67% NBS.
- For high-importance or high-risk buildings.
- To support strengthening design or compliance.
Output:
- Detailed %NBS rating for structural elements.
- Specific retrofit recommendations (if needed).
Best for:
- Commercial property transactions.
- Buildings requiring building consent or compliance upgrade.
- Insurance or financing purposes.
Our Structural Experts
Jade Kirk, CEO
Jade is an industry leading engineer, and a founder of Kirk Roberts Consulting. Established in 2006, Kirk Roberts has expanded to five offices across New Zealand with a growing team of multi-disciplinary experts and consultants. An innovative leader, Jade specialises in complex engineering and large-scale project developments.
Renowned for his technical expertise and broad industry knowledge Jade’s experience has enabled the company to develop from a small consultancy to New Zealand’s leading medium-sized engineering practice. He is keenly involved in design while providing strategic leadership.
Outside of work, he thrives when pushing his boundaries on the slopes, rugby field and in the surf. In his words, anything his insurance company doesn’t like.
“We’re proud to have created a company with excellent technical competency and quality for clients; one that drives innovation, looks after its employees and has an exceptional culture.”
Jade Kirk, CEO
Damian McMillan, National Manager
Damian McMillan is a founding director of the company, opening the Tauranga office in 2006. With over 20 years in the construction and engineering industry, he is knowledgeable and experienced in managing complex projects, building key client relationships, and developing a national team. He has been exposed to a large variety of projects including industrial, commercial, retail, healthcare, education, and software development. Damian brings succinct communication with a ‘no surprises’ approach for clients. With a passion for innovation, he is focused on driving the company forward through new initiatives, culture, and software development.
When he’s not in the office, you’ll find Damian fishing, diving, or gardening (with a chainsaw and any other powertool!) and spending time with his family.
Damian McMillan, National Manager
Jan Jober, Regional Manager
Jan is the Regional Manager for the Auckland area and also the Greater Wellington region and brings to the role nearly 20 years of experience in analysis, design, and delivery of multi-disciplinary projects in the residential, commercial, industrial, and infrastructure sectors. His expertise and focus includes structural engineering, modular and volumetric designs and delivery. He is committed to finding innovative and cost-effective design solutions for clients. He manages a high-performing office environment of 40 professional staff, effectively and with humour.
Jan has previously lived and worked in The Czech Republic, Spain, England, Ireland, and Canada. Out of working hours, he can be found on his mountain bike or hiking and skiing with his family.
“We celebrate 17 cultures in our Auckland office, and we thrive by developing strong and trusted relationships with project stakeholders”
Jan Jober, Regional Manager
Nik George, Regional Manager
Nik George leads our South Island team. A structural engineer with over 25 years experience with a strong multidiscipline focus, Nik has worked in the UK on projects ranging in value from $0.5M to $100M across most major sectors. He came to New Zealand in 2012 to work on the Christchurch rebuild. Having settled in New Zealand his role has progressed through the management of national discipline teams to the current role of supporting our 70 staff in Christchurch.
Outside of work he enjoys squash, boating and sea fishing.
“Bringing everyone’s different ideas into focus is a passion for me. Creating and delivering efficient and cost effective solution for our clients is a fundamental driving force.”
Nik George, Regional Manager
Deborah Curd
Deborah is a structural engineer and leader with over two decades in New Zealand’s construction and property sector. She has delivered projects across commercial, education, and infrastructure, with recognised expertise in seismic strengthening, structural design, and collaborative project delivery.
As National Structural Manager at Kirk Roberts Consulting, she is focused on guiding the structural team nationwide, fostering innovation, and strengthening KR’s reputation for practical, forward-thinking engineering. Deborah is respected for her ability to connect technical detail with broader development goals, and has contributed to industry working groups, governance roles, and regulatory panels to help shape best practice.
Outside of work, she enjoys exploring Canterbury’s outdoors with her young family.
“I’m excited to have joined Kirk Roberts. What stood out to me was the strong sense of collaboration, innovation, and shared purpose. I look forward to supporting our teams nationwide and pushing the boundaries of what’s possible in structural engineering.”
Deborah Curd
Dean Nettlingham
Dean is a Principal Structural Engineer and Senior Technical Leader in the Tauranga office and is a Chartered Professional Engineer (CPEng) with Practice Area qualifications including Structural, Civil, and Engineering Management.
Based in Tauranga for the past 25+ years, Dean brings extensive local knowledge and strong relationships across the Bay of Plenty construction industry, complemented by international experience in London, Kuala Lumpur and Hong Kong earlier in his career.
Dean is recognised for his advanced technical expertise, sound engineering judgement, and practical approach to complex and significant projects. He works closely with clients, contractors and multidisciplinary project teams from design through to construction, with a strong focus on value engineering and achieving successful project outcomes
His experience spans commercial and industrial developments, multi-storey and apartment buildings, high-end residential, education, retirement living and the food industry.
Outside of work he enjoys spending time with his family and friends, getting outdoors, keeping active, and family boating trips in the summertime.
“Kirk Roberts is a progressive and innovative company, that is embracing advances in technology across engineering design and documentation to continually improve efficiencies and outcomes for clients. That’s something I’m really pleased to be part of.”
Dean Nettlingham
James Carter
James is motivated by working alongside smart, driven people to solve complex problems. He is excited by the opportunity engineers have to help address some of New Zealand’s most significant building and infrastructure challenges, particularly in the face of climate adaptation, demographic change and global instability. At Kirk Roberts, he values being part of a team that embraces innovation and advances in technology to improve how projects are delivered.
Outside of work, he enjoys tramping, fishing and gardening, as well as spending time with his wife, their two daughters and their dog.
“As engineers, we have both a responsibility and an opportunity to improve the world around us—making the most of the materials we use and always looking for ways to do more with less.”
James Carter
Julio Ortiz
Julio is a result-driven structural engineer with a passion for sustainable design, leadership, and project coordination. He brings a strong combination of technical depth, aligning stakeholders around shared project goals, and embedding sustainable thinking into the earliest phases of design. Julio plays an active role in the industry, currently serving as part of SESOC’s Management Committee, SESOC’s Sustainable Design Task Force and the IABSE TG6.7, an international group working on the mitigation and transition towards carbon neutrality.
Outside of work, he enjoys pushing his body to the limits doing CrossFit, doing a bit of acting and writing, or trying new coffee places around Christchurch.
“I believe that a genuine care for people and belief in their potential has shaped the way successful and sustainable projects are delivered. Outcomes are built on empathy, teamwork, and a focus on long-term value.”
Julio Ortiz
Parthiban Ariyaratnam
With 15+ years of experience, Parthiban is an expert in the structural design and supervision of residential, industrial, and commercial projects.
Parthiban and his team provide valuable engineering design input on projects and ensure that this high level of design is followed in construction through to completion. Parthiban takes a personable approach to his work and enjoys developing long-term relationships with clients.
Parthiban enjoys socialising with friends and family, living an active lifestyle, keeping fit, doing sports, and traveling around New Zealand with my wife and two daughters.
Parthiban Ariyaratnam
Rui Li
Rui provides trusted technical support and leadership to his Christchurch-based team. His technical expertise means he is often called upon to provide input into nationwide technical development and standards within Kirk Roberts.
Rui’s valuable engineering design and excellence have seen him work across a variety of complex projects in a range of sectors. He has also been involved in numerous assessments of existing buildings and the subsequent strengthening and retrofit design works. Rui understands that consistent communication is crucial in creating the best outcome for project stakeholders, and collaborates with the various parties across all project phases to ensure this.
Outside of work, you’ll find Rui spending time with his young family, on his bike, or tinkering in the garage.
Rui Li
Simon Finn
Simon has over twenty-eight years’ experience in structural engineering, initially starting his journey designing structures for the water industry, then moving into the world of buildings. Simon has led multidisciplinary design teams on large projects ranging from schools and hospitals to casinos and retail, with specialist, in-depth experience in using steel framing.
Simon relocated to New Zealand, where he has developed a passion for forensic assessment of earthquake-damaged structures and has quickly become one of New Zealand’s leading experts in this field. This specialist expertise has now expanded to providing expert witness services on litigated claims relating to many different structural issues, from design flaws to construction failures and non-compliances, across New Zealand. This expertise has been recently recognised with Simon winning the Engineering NZ President’s Gold Medal Award in 2022 and more recently achieving Fellow status with Engineering NZ in 2023.
In his spare time, Simon can be found in the gym or out walking. At home, Simon has a passion for model building and, being a child of the 80’s he is also a keen gamer.
Simon Finn
Our award-winning projects include state-of-the-art structures such as Young Hunter House in Christchurch – the first of its type in New Zealand to feature a post-tensioned timber frame. The building was designed to withstand a one-in-2500-year seismic event with controllable, minimal and repairable damage.
Our Projects
Skellerup Industries, Christchurch – A complex engineering and construction project, requiring innovation from concept through to completion
Liz van Welie Aquatics, Tauranga – First of their kind to be used in commercial operations in New Zealand