Managing mine closures for Glencore, testing water resilience for Coca-Cola in Namibia and virtual reality modelling for National Grid are just some of the recent projects undertaken by this global environmental consultancy. Since starting in Buckinghamshire in 1994 as a specialist in the waste management sector, the company has grown internationally through more than 20 acquisitions and is aiming to expand in all regions but particularly in the US. Neil Penhall, 53, is chief executive.

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Company details
Year2017
CompanySLR
ActivityEnvironmental consultancy
LocationBuckinghamshire
Sales £m113
Operating profit £m5
Staff1,138
Founded1994
Websitewww.slrconsulting.com

If applicable:

* supplied by company † annualised figure