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

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 18 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 Engineering New Zealand 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 has 11 years engineering experience. He first graduated from Otago Polytechnic in 2006 with a Diploma in Civil Engineering, and again in 2012 when he copleted 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 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 is a member of Engineering New Zealand, in 2018 he was registered as a Chartered Professional Engineer (structual).  

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

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

Rhys has almost 4 years of engineering experience, he completed his Bachelor of Engineering Technology in 2014 specialising in structures, and is a Member of Engineering New Zealand. His skills include structural design and documentation including finite element modelling of structures, as well as inspection and construction observations.

Rhys has very good hands on skills, and is adept at working with timber and steel, which makes him highly proficient in the detailing and production of structural CAD drawings.

Rhys has worked for Structural Engineering Design Solutions since its inception in 2015 and is working towards the goal of becoming a Chartered Professional Engineer.


Graduate Structural Engineer
Yunjian (Gary) Li 
BE (Hons), MEngNZ 
022 190 2751  | yunjian

Gary completed a Bachelor of Engineering with Honours from the University of Canterbury in 2017 with a major in structural engineering. He is a Member of Engineering New Zealand.

Gay’s final year project at university on “Floor system design in multi-storey timber residential buildings” was sponsored by BRANZ, and received a Commendation for Poster Presentation at the Final ear Research Conference in 2017.

Gary is keen to develop his skills in the field of structural engineering and work towards the goal of becoming a Chartered Professional Engineer.


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