Structural & Civil Engineering

Built for now,
engineered for the future.

A progressive engineering consultancy creating lasting, positive impact for clients, end-users, and communities alike.

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Problem-solving
is in our nature.


We are a progressive engineering consultancy driven to create a lasting, positive impact for clients, end-users, and communities alike. With a forward-looking mindset and an open approach, we design solutions with purpose where it matters most.

Complex challenges energise us and we meet them with technical rigor, creativity, and an influential, confident attitude. Our experience enables us to make timely, sound decisions, while our diversity of thought unlocks smarter, more resilient outcomes.

At our core, we are natural connectors — a dependable, engaged team that brings clarity, assurance, and momentum to every project. Hands you can trust. Minds you can build with. Built to deliver more.

Iesis Structures team reviewing structural plans in the office

Our Services

Expert engineering solutions delivered with precision, creativity, and an unwavering commitment to excellence.

Structural Engineering

Structural & Civil Engineering

Comprehensive structural design and civil engineering solutions for projects of all scales and complexity.

Site Appraisals

Site Appraisals & Due Diligence

Thorough site investigations and technical assessments to inform decisions with confidence.

Structural Surveys

Structural Surveys

Detailed condition reports and structural assessments for existing buildings and infrastructure.

Sustainable Drainage

Sustainable & Urban Drainage Systems

Innovative SuDS solutions that manage surface water sustainably and meet planning requirements.

Value Engineering

Value Engineering

Optimising designs to maximise performance and value without compromising quality or safety.

Featured Projects

Browse a selection of our landmark projects across London and the South East.

Our Clients

Senior Team

Decades of structural and civil engineering experience, led by directors and specialists who shape every project.

Iestyn Lewis, Group CEO

Iestyn Lewis

Group CEO, Iesis Group

Matt Jones, Group CEO Engineering

Matt Jones

Group CEO, Engineering

Tony Ruck, Director

Tony Ruck

Director

Alan Werrett, Technical Director

Alan Werrett

Technical Director

Gareth Wilby, Civils Director

Gareth Wilby

Civils Director

John Simmonds, Associate Director

John Simmonds

Associate Director

Jonathan Taylor, Associate Director

Jonathan Taylor

Associate Director

Roger Jack, Associate Civil Engineer

Roger Jack

Associate Civil Engineer

Alecsandra Cretu, Associate CAD Manager

Alecsandra Cretu

Associate CAD Manager

Let's build
something remarkable.

Whether you're planning a new development or need expert structural advice, our team is ready to help bring your vision to life.