Welcome to Sidara

A global collaborative of specialist design, engineering, and consulting firms would our home.

Our Story

Our story began over 65 years ago, when a small group of visionary engineering professors set out to build a better world.

Since then, we’ve evolved organically, and through a series of long-term, strategic acquisitions, focusing on companies with exceptional talent and culture.

As a global network of specialist firms, we are uniquely positioned to tackle the world’s biggest, most ambitious, and most critical challenges. From iconic projects to groundbreaking solutions, we’re not just delivering results – we’re shaping how people live, inspiring global impact, and making room for cultures to shine.

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Our Vision

As the home for human endeavor, our mission is very clear – to elevate the human experience, advance sustainability, and ignite transformation through innovation.

Each day finds us tackling some of the most critical, inspiring and complex design and engineering challenges - and each day, we are striving for long-term human and social advancement.

From working on Changi International Airport in Singapore, to Google Bay View in the US, we put our hearts and minds into creating visionary environments where humanity and nature can co-exist.

Our Values

Together, we advocate for a better world and aspire to create a positive impact for humanity.

This purpose cascades into all areas of our work. Every aspect is undertaken with care and intention to make the world feel more intimate, supportive, familiar, and ever evolving.

We lead with imagination, commitment, determination, and resilience, to take on the world’s most critical challenges — building a world that welcomes all, that is home to all.



Every member of Sidara contributes to making the place we all call home, a better place to be.



Our impact spans over 60 countries around the world.



Our companies have their own unique cultures and specialties, yet all belong to something much bigger.



Located in major cities across the planet, we’re changing how people live, inspiring global impact, and making room for cultures to shine.

Our History

Our award-winning brands are some of the most well-known and trusted in the industry. Over the decades we’ve grown into a global collaborative of businesses, responding to the needs of our clients who are looking to solve some of the world’s biggest and most critical challenges.


Our collaborative begins

Architecture and design firm Perkins&Will joins Sidara—the first in a number of strategic partnerships.


Increasingly global reach

TYLin International, a US civil and structural engineering firm, joins Sidara, increasing its stronghold in the US and opening up new opportunities in Asia.


Entry into the UK market

Sidara makes its third acquisition, UK-based Penspen, an engineering, operations, integrity and maintenance services company for the oil and gas industry.


Opportunities in global aviation sector

Sidara acquires leading US airport and aviation planning consultancy firm Landrum & Brown, opening up the aviation sector in China, Asia, Australia and the Middle East.


Enhancing infrastructure expertise

The Collaborative further expands its US building system design presence by acquiring Integral Group.


Enhancing infrastructure expertise

Sidara acquires American firm Ross & Baruzzini, enhancing its engineering, technology consulting and architectural expertise and capabilities in the aviation, education, government, healthcare and mission critical industries.


Pioneering through acquisitions

Sidara acquires the UK-based consultancy firm Currie & Brown, which in 2016 itself acquired Sweett Group plc to complement and enhance the Collaborative’s existing project management offering, whilst also increasing its foothold in existing and new markets.


Enhancing infrastructure expertise

Sidara acquires Italian engineering company Maffeis, providing specialist engineering services for Tension Membrane/Fabric Structures and ETFE foil designs for long span structural applications such as stadia covers, facades and retractable roofs.


A new strategic partnership

Sidara enters a strategic partnership with GPO Group, an international multi sector engineering company, offering planning, design and operation services for transportation, building, environment and automotive projects.


A new strategic direction

The Collaborative acquires a strategic 25.9% equity stake in Worley.


Solutions for structures

Sidara acquires Silman, a leading privately held structurally engineering firm based in New York.


Consolidating capabilities in innovative engineering

Integral Group and Ross & Baruzzini merge together to form Introba.


Expanding water consultancy services

Sidara acquires Greeley and Hansen, an environmental engineering firm specializing in water and wastewater engineering and utility management consulting.


A new frontier in building analytics

Sidara acquires a majority stake in CopperTree Analytics.

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Collaboration is core to our success and we're here to help you find solutions to your most pressing challenges. Together, we can achieve more for our communities, change how people live, and inspire global impact.

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