Global Leaders in Sustainability Solutions
Purpose
SLR’s purpose is Making Sustainability Happen.
Our unique strength lies in bringing together strategic advisory expertise, deep scientific and engineering knowledge grounded in real-world experience, and trusted data and digital capabilities. Together, these integrated strengths help clients move from ambition to practical action that delivers measurable, lasting impact.
Approach
We partner with clients to drive meaningful, lasting change.
In a world of increasing complexity and interdependency, we work alongside our clients in the places they operate while leveraging expertise from across the globe. This ensures we bring knowledge of acute local challenges alongside proven solutions from across sectors and geographies.
We help organisations balance environmental, social and commercial priorities, creating long-term value for their business and stakeholders. By helping clients weigh risk, reward and resilience, we support confident decision-making and practical action that delivers measurable impact.
“We founded the business in 1994. Since then, we have built ‘One Team’ of talented environmental and business consultants, engineers and scientists. We partner with clients throughout their project life-cycle from strategy and design, through compliance and operations, to end-of-life remediation.”
Neil Penhall, Vice Chair
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127
Countries
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140+
Offices
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5,000+
Global staff
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60+
technical services
SLR timeline
SLR has advised clients globally for over 30 years at every point of their project life-cycle. Today, more than 5,000 international colleagues deliver strategic, technical and digital solutions across the Americas, Asia-Pacific, Europe, the Middle East and Africa, as we continue to grow both organically and by welcoming other like-minded businesses that share our One Team culture. We are ably supported by our principal investor, Ares Management, and will continue to build a balanced, successful and growing business.
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1994
Founded initially in the UK as SECOR Ltd.
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2000
Company’s name changed to SLR. Operations commence in the USA. Staff numbers 100+.
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2007
Turnover exceeds £30M and 250+ staff. Canada added as an operational region.
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2010
Operations open in Australia. Further growth in North America and UK.
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2011
Operations commence in South Africa and Namibia.
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2014
Group turnover tops £103M. Staff levels 1,000+ SLR operations commence in New Zealand and France.
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2019
300+ people and 6 new businesses added, including MMI and RPA. Total staff numbers pass 1,500.
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2020
Complete acquisitions of MMI & KDC. Operations commence in Ghana.
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2021
Complete acquisitions of 360 Environmental, Vectos & Corporate Citizenship. Adding Germany & Latin American presence.
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2022
Investment from private equity partners Ares Management. Complete acquisitions of 4Sight, Clearlead, ClimSystems, Finch & Beak, OPEN, RCS Global & WRM.
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2023
Staff levels 3,000+ and 3 new businesses acquired, Carnstone, IBIS Consulting and Palmer. SLR launched a new company brand and Bradley Andrews joined as our new Chief Executive Officer.
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2024
1,000+ people join SLR’s global team, with 11 new businesses added, including FRC Environmental, ITPEnergised, Malk Partners, SGA & Wardell Armstrong.
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2025
Launched a new Sustainability Strategy, providing a focused framework around SLR’s three pillars: our people, our impact, and our environment. Growth continued with 7 new acquisition companies joining.
