Global Leaders in Sustainability Solutions


SLR’s purpose is Making Sustainability Happen.

We achieve this by having a team of expert advisors and technicians, who partner with our clients to tackle some of the world's most complex sustainability challenges, by utilising our collaborative and entrepreneurial One Team culture.


To be recognised as the global leader in sustainability solutions, providing clients with strategic advice and on the ground support, partnering with them in Making Sustainability Happen.

"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 and remediation."

Neil Penhall, Vice Chair

  • 125


  • 100+


  • 3,000+

    Global staff

  • 45+

    technical services

SLR timeline

SLR has been advising clients for over 25 years at every point of their project life-cycle. Starting as a UK business, we now operate as a global company with more than 3,000 people delivering client solutions across six regions. We have grown both organically and through welcoming other like-minded businesses with a similar One Team culture into the SLR group. We are ably supported by our principal investor, Ares Management, and will continue to build a balanced, successful and growing business.

  • 1994

    Founded initially in the UK as SECOR Ltd.

  • 2000

    Company’s name changed to SLR. Operations commence in the USA. Staff numbers 100+.

  • 2007

    Turnover exceeds £30M and 250+ staff. Canada added as an operational region.

  • 2010

    Operations open in Australia. Further growth in North America and UK.

  • Map of Africa


    Operations commence in South Africa and Namibia.

  • Maps of France and New Zealand


    Group turnover tops £103M. Staff levels 1,000+ SLR operations commence in New Zealand and France.

  • Icon representing growth of staff


    300+ people and 6 new businesses added, including MMI and RPA. Total staff numbers pass 1,500.

  • Map of Ghana


    Complete acquisitions of MMI & KDC. Operations commence in Ghana.

  • Maps of Germany and South America


    Complete acquisitions of 360 Environmental, Vectos & Corporate Citizenship. Adding Germany & Latin American presence.

  • Icon representing global presence


    Investment from private equity partners Ares Management. Complete acquisitions of 4Sight, Clearlead, ClimSystems, Finch & Beak, OPEN, RCS Global & WRM.

Further reading

Similar pages

Recent articles

  • Featured

    29 November 2023

    1 minute read

    Meet our CEO - Bradley Andrews

    Read more
  • News

    30 November 2023

    2 minutes read

    Read Brian Bakowski's featured article in Moden Casting November 2023

    by Brian Bakowski

    Read more
  • News

    29 November 2023

    1 minute read

    Addressing remediation and redevelopment with a sustainable mindset

    by Lyssa C Naron

    Read more
View all