We provide an opportunity for great people to partner with great clients on environmental and other sustainability challenges in a collaborative, equal and entrepreneurial 'One Team' culture. We then seek to offer returns for our staff and shareholders over the long term, so that we all share in the success of our business.


"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. Our ambition is to be recognised as the global leader in environmental and advisory solutions, helping our clients to achieve their sustainability goals." Neil Penhall CEO


Text reading: Be our clients' partner of choice Strategy, design, approvals, operations, and end-of-life
Text reading: Be the place to work in our sector Attract, develop and retain the best
Text reading: Lead on environmental, social and governance (ESG) services Delivering advice, insights and value
Text reading: Be a balanced, successful and growing business For our people, clients, investors and communities

SLR today

Graphic image of a globe and the words: 6 regions Projects on every continent
Graphic image of an office and a tree and the words: 100+ offices In 13 countries
Graphic image of staff and the words: 1800+ staff A collaborative 'One Team' culture
30+ technical services Environment, engineers, advisory


Graphic image showing built environment icon Investors, developers, regulators, policy makers, landowners
Graphic image showing energy icon Energy majors, independents, NOCs, financiers, governments
Graphic image showing financial icon Banks, private equity, investment trusts, investors, advisers
Graphic image showing Infrastructure icon Transportation, public works, delivery partners, waste mgmt.
Graphic image showing manufacturing + industry icon Consumer, food & drink, pharma., chemical, forestry, agriculture
Graphic image showing mining + minerals industry icon Mining majors, independents, aggregates, banks, investors
Graphic image showing power industry icon Regulators, producers, generators, network operators, end users
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 1800 people delivering client solutions across five 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, Charterhouse Capital Partners, and will continue to build a balanced, successful and growing business.

Founded initially in the UK as SECOR Ltd

SLR timeline graphic 1994. Map of United Kingdom.

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

SLR timeline graphic 2000. Map of USA.

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

SLR timeline graphic 2007. Map of Canada.

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

SLR timeline graphic 2010. Map of Australia.

Operations commence in South Africa and Namibia.

SLR timeline graphic 2011. Map of South Africa and Namibia.

Group turnover tops £103M. Staff levels 1000+ SLR operations commence in New Zealand and France.

SLR timeline graphic 2014. Map of New Zealand and France.

New investment by Charterhouse Capital Partners as major shareholder in SLR

SLR timeline graphic 2018. Charterhouse Capital Partners logo.

300+ people and 6 new businesses added, including MMI and RPA. Total staff numbers pass 1500.

SLR timeline graphic 2019. People icon representing SLR staff.

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

SLR timeline graphic 2020. Small outline map of Ghana.

Complete acquisitions of Vectos & Corporate Citizenship. Adding German & Latin American presence.

SLR timeline graphic 2021. Small outline map of Germany & South America.