Head of Ground Engineering, London
Contact Mohsen Vaziri
T: +44 20 7631 5291
“"Identifying below-ground risks early on means that you make the right decisions for your site. Technically, it may be complex but that shouldn't be the client's problem."”
Mohsen Vaziri joined the practice in 2001 and has been director since 2004.
He founded and leads our UK geotechnical engineering team.
In almost three decades as a geotechnical engineer, Mohsen has developed impressive expertise on projects ranging from large scale civil engineering to complex urban geotechnics — including developments that expand the boundaries of construction knowledge.
His comprehensive experience finds him well placed to handle the challenges of new and emergent technologies: deep sea wind farms are a recent example. On urban sites, he has helped clients to achieve extraordinarily ambitious aims at acceptable levels of risk. Such projects often include deep excavations on confined sites and construction above, below or near to underground tunnels and railways lines, both existing and planned. The analysis and design of substructures and foundations — including the re-use of existing foundations — is another area of particular strength. As an active contributor to geotechnical engineering knowledge, Mohsen has published on his findings in these fields.
These specialisms complement the full range of Mohsen's skills, which include project feasibility, planning, technical management, interpretation of major site investigations, independent review, soil-structure interaction analysis and geotechnical modelling.
Mohsen is a calm and confidence-inspiring member of the project team, able to communicate highly technical issues clearly and with full consideration of the implications for risk, budget and other client priorities.
One Southampton Row
This six-storey steel frame development is located in a central London conservation area. The idea was to improve the building's potential as a commercial site while observing local authority building guidelines — the 19th century sections of the masonry façade remain intact...
BBC W1 project
The BBC has developed a new broadcasting complex consisting of two new, linked buildings and a refurbished Broadcasting House. The project has been constructed in two phases...
Ferrari World in Abu Dhabi is the World’s only Ferrari theme park. Sixty of our engineers worked on the four-year project and were involved in every aspect of the park's unique design from concept to completion.
Designed to provide 30,000 sq m of floor space, at the time of construction this six-storey steel-composite structure was the largest speculative office development to be undertaken in London's West End in a decade.
Six of our departments worked with the architect Squire and Partners to develop the design, necessitating rigorous project co-ordination. The results speak for themselves: the building was delivered 15% below budget and two months in advance of the original programme.
Site challenges included the close proximity of London Underground tunnels and re-use of existing pile foundations, both of which required detailed analysis and strategy.
We used 15m spans to provide the necessary column-free space for a fully flexible, open plan interior. The stee ...
Okhta Centre Tower
Part of a broader urban regeneration project aimed at reclaiming the city's stature as a major European centre for culture and commerce, this HQ building is to be the tallest building in St Petersburg.
The competition-winning design is for a glass-clad tower with a distinctive twisted profile that tapers to a rounded point — evoking the contour of a gas flame. Inspired by the pentagonal plan of an ancient Scandinavian fort believed to have once occupied the site, the tower consists of a central concrete core ringed by five square interlocking floorplates. The floorplates spin on their axes as they ascend, giving the building its twisted effect. A 'cog mechanism' — whereby the five floorplates interlock — ensures the tower's stability. Steel beams link the core to the external co ...