Civil, Structural, Earthquake Engineering
Residential, Commercial & Light Industrial Structural Design
We know our role
Foundation & Retaining Wall Design
Site Soil Bearing Capacity Testing
We know where we fit in

What we do Solutions

Do you need specific engineering designs or a Producer Statement? Have you got multiple contractors to coordinate and you don’t want any hold-ups? You don’t need your Structural Engineer to overplay their role, but you do appreciate any ideas and feedback that can help save you time, money and hassles in your construction project. We get it…

There is a reason we included the word ‘Solutions’ in our name. To be the best solution, we need to be timely, accurate, accessible, and easy to work with. Unlike other structural engineering firms, who can sometimes put a spanner in the works, we are committed to ensuring your project stays on track.

Past Projects

Port Chalmers Warehouse

Milk Powder storage Warehouse/ Cruise liner disembarking building

Structural design of a 30m x 30m steel portal structure, precast concrete panel cladding. On uncontrolled harbour reclamation. Earthquake and wind design

Leith Street apartments

Carry out Specific Engineering Design for a proposed 9 apartment block. This included the design of foundations, concrete block walls, concrete flat deck, suspended floors and steel stairs, as well as the design of retaining walls for the site. SEDS also undertook construction observations.

Jetty Street

Seismic strengthening of a 2 story (AGE) unreinforced masonry building in Dunedin’s warehouse precinct, constructed over uncontrolled harbour reclamation. Design of raft slab to support the entire weight of the building. Creation of diaphragms in the roof and intermediate floors and bracing design.

Musselburgh Childcare Centre

The structural design and documentation for a proposed child care facility building.  The building was architecturally designed and is around 680m2. Our scope was to develop the structure based on the architect’s drawings and design all of the structural components including the foundation on a site with poor ground conditions. SEDS also undertook construction observations.

Our team Work with professionals

Principal Engineer
Lyndsay McGrannachan
BE (Hons), BSc, PgDipSc, CMEngNZ, CPEng, IntPE
022 037 0173 |

Lyndsay is a co-founder and director of Structural Engineering Design Solutions.

Lyndsay has 16 years’ experience in structural and civil engineering. Prior to completing his Bachelor of Engineering with honours in 1999 he worked as a self-employed builder and worked on a variety of residential construction.

Lyndsay also has a Batchelor of Science and a Post Graduate Diploma in mathematics. In 2011 he became a Member of IPENZ and was registered as a Chartered Professional Engineer (structural and civil). Lyndsay has wide ranging experience in design and assessment of buildings and bridges, one of his specialisations is carrying out detailed seismic assessments, using Finite Element modelling software to carry our response spectra analysis.

Lyndsay is Structural Engineering Design Solutions Principal Engineer, his background as a builder gives him practicality and his attention to detail make him a highly effective reviewer which ensures quality output of all designs and documentation.


Structural Engineer
Kieran McGrannachan
BEng Tech, Dip Eng, CMEngNZ, CPEng
027 304 1225 |

Kieran is a co-founder and director of Structural Engineering Design Solutions.

Kieran first graduated from Otago Polytechnic in 2006 with a Diploma in Civil Engineering, and again in 2012 when he completed a Bachelor of Engineering in Civil Engineering, specialising in structures and also transportation. Kieran has wide ranging experience, starting his career as a Structural Technician working primarily on bridge projects for local authority clients across New Zealand and also in Fiji. In 2011 Kieran became a Technical member of IPENZ, and a registered Engineering Technology Practitioner. In 2013 Kieran took a new role as a Structural Engineer in the field of specific engineering design for residential and commercial buildings and earthquake assessments.

Kieran has co-authored two published articles about the seismic vulnerability of Dunedin buildings.

Graduate Structural Engineer
Rhys Dalton
BEng Tech, MEngNZ
027 203 9700 |

Rhys is a graduate structural and civil engineer. He completed his Bachelor of Engineering Technology in 2014, and is a Graduate Member of IPENZ. His skills include structural design and documentation as well as inspection and testing. He has experience carrying out NZSEE building Initial Seismic Assessments and seismic design. He is proficient in the production of structural CAD drawings. Rhys has worked for Structural Engineering Design Solutions since its inception in 2015.

Graduate Structural Engineer
Sarah Williamson
DipEng, BAppSc (Hons), MA, GIPENZ
0210 238 6550 |

Sarah is a graduate structural engineer who joined Structural Engineering Design Solutions in 2017. She completed a New Zealand Diploma in Civil Engineering at Otago Polytechnic in 2016 and also holds a Bachelor of Applied Science in Energy Management and a Master’s degree in Music. Her previous employment experience includes energy auditing, audio engineering, and research assistance, and she is currently gaining skills in structural design, drawing, and documentation. Sarah was the 2016 Student Engineers New Zealand representative for Otago Polytechnic and is a Graduate member of IPENZ.

Contact us Keep in touch

  • Postal Address
  • 23 Hereweka Street, Portobello Dunedin 9014
  • Office Address
  • Level 10 John Wickliffe House 265 Princes Street, Dunedin
  • Phone number
  • +64 3 390 7337