Leading global innovator of sustainable analysis technology

Resource-efficient, healthy and cost-effective built-environments

About IES

Over the last 25 years we have built a solid reputation as the leading global innovator in integrated performance based analysis, and we're now home to the largest building analytics team in the world.

Supporting resource-efficient, healthy and cost-effective built-environments, we simulate and analyse data to give those involved in their creation and management the information needed to make smarter, more sustainable decisions with confidence.
Our unique software and technology, is supported by expert consultancy. And our dedicated R&D department ensures our analytical tools and industry knowledge stays pioneering and innovative.

Our Mission

Better Buildings: Smarter Cities

We believe that every building of every city in the world can be decarbonised. Our purpose is developing the technology to make that happen. Our ultimate aim is to create a built environment that is resource and energy efficient. Eliminating global reliance on fossil fuels while promoting comfort, health and wellbeing, and fairer access to energy for every citizen in the world.

City view from window

Our Values

Our History

IES was founded on three fundamental observations.

  • Number 1

    Buildings are major consumers of energy and must be made more efficient to cut CO2 emissions, conserve fossil fuels and preserve the environment for future generations.

  • Number 2

    Historically buildings were generally designed on experience and simplistic performance calculations, even though performance-based building simulation had been proven to create buildings that consume significantly less energy.

  • Number 3

    Such building performance tools were too complex and remained in the hands of academics, making little impact on mainstream commercial design.

Meet our Directors

Don McLean

Founder and Managing Director (CEO)

Craig Wheatley

Chief Technology Officer

David McEwan

Consultancy Director

Susan Falconer

Marketing Director

Scott Finlayson

Finance Director

Ruth Kerrigan

Chief Operating Officer

Rohan Rawte

Director Asia and Middle East

Lorna Celnik

HR Director

Richard Fletcher

Global Sales Director


IES is widely regarded as a world leader in intelligent sustainability solutions for the built environment. As such, IES is fully committed to carrying out all reasonably practicable measures to continually improve its own environmental performance and reduce the impact of its operations. Our biggest impacts, and therefore focuses, are our office & event operations, IT equipment use, and travel.

SME Climate Commitment

Recognising that climate change poses a threat to the economy, nature and society-at-large, IES have joined the United Nation’s Race to Zero campaign under the SME Climate Commitment. Taking action immediately in order to:

  1. Halve our greenhouse gas emissions before 2030
  2. Achieve net zero emissions before 2050
  3. Disclose our progress on a yearly basis

In doing so, we are proud to join governments, businesses, cities, regions, and universities around the world that share the same mission.

Our Customers & Partners Include:

World Leaders

Operating in more than 13 countries around the world, across Europe, North America, Asia, Middle East, and Australia, our specialists work with a growing network of partners and associates to deliver truly valuable expertise in building analytics.

Our Locations
IES Glasgow Office

Work with us

Interested in joining our team? Visit our Careers pages to browse our current opportunities.