• Neil Penhall

    Chief Executive Officer Neil Penhall

    Neil has been with the business since 1995 and is the Chief Executive of SLR Global Limited and a director of a number of its subsidiaries with overall responsibility for the strategic direction and management of the group. Prior to becoming Chief Executive in 2013, Neil was responsible for all international operations outside of the Americas (Europe, Africa and Asia-Pacific). In addition to leading and directing the strategic growth, operations and diversification of the business, Neil had previously been Managing Director of the UK business from 2001 to 2009. Neil qualified as a mining engineer and has more than 30 years of experience in international environmental consultancy.

  • Peter Skinner

    Chief Operating Officer Peter Skinner

    Peter leads on operational management and growth in SLR, providing leadership and working closely with the Regional Managers and their service line and sector teams. He has been a consultant for 35 years in geotechnics and environment, and alongside his leadership roles he has significant experience in both project management and client development.

  • Andy Bolter

    Chief Financial Officer Andy Bolter

    Andy is the Chief Financial Officer (CFO) of SLR having joined the firm in May 2020. Previously Andy was the UK CFO of SOCOTEC, the environmental testing and inspection services group. He has also held senior financial leadership roles with Environmental Scientifics Group, where he was CFO, and Lafarge Tarmac.

  • Graham Elton

    Chairman Graham Elton

    Graham joined SLR as Non-Executive Chairman in 2018. He ran Bain & Company’s EMEA Private Equity business from 2005-18 and is now Chairman. He is also Chairman of Pageant Media, Capital Economics and Lane, Clark and Peacock. Prior to joining Bain as a Partner he ran businesses for United Business Media and Pearson and worked at The Boston Consulting Group. Graham has a degree in Modern History from Oxford and an MBA from Harvard Business School.

  • Peter MacKellar

    Group Support Services Peter MacKellar

    Peter joined the Board of SLR in January 2015 and is Group Support Services Director with responsibility for Health & Safety, Quality, Environment, Business Processes and Systems, IT, and Risk. Peter joined SLR from Sinclair Knight Merz (SKM), part of Jacobs Engineering Group Inc., where he was Chief Operating Officer, Europe, Middle East & Africa (EMEA). Peter gained a Civil and Structural Engineering honours degree at Sheffield University, holds a diploma with distinction in engineering management from Bristol University, and is a graduate of Insead Business School in France.

  • Helen Brown

    Chief HR Officer Helen Brown

    Helen joined SLR in 2018 and moved onto the SLR Board in January 2020. She has executive responsibility for all aspects of the people agenda across the business globally. Helen has 30 years of experience in engineering, management consultancy and HR roles. Prior to joining SLR, Helen worked for Esso Petroleum, IBM and The Boston Consulting Group.

    Helen has a Chemical Engineering degree from Imperial College, London and is a Fellow of the Chartered Institute of Personnel and Development.

  • Chris Mulligan

    Chief Strategy Officer Chris Mulligan

    Chris joined the SLR Board in 2020. He has executive responsibility for the growth agenda and is responsible for working with the business and its PE investor on both strategy and M&A growth plans. He is also responsible for business development, marketing and the global sector growth plans.

    He has 20 years’ experience in strategy, business development, digital transformation and consulting roles across the infrastructure, government and private sectors. Prior to joining SLR, Chris was a Director at Atkins for over 10 years, where he held several leadership roles, most recently as Strategy Director. He also spent 10 years at PA Consulting as a management consultant.

  • Kevin Rattue

    Regional Manager - US Kevin Rattue

    Kevin is responsible for operations in the US and serves as Chairman of SLR International Corporation in the US. Prior to joining SLR in 2000, Kevin was the Chief Operating Officer of SECOR International, a $100 million turnover international environmental consultancy with its head office in Seattle. Previously Kevin worked as an exploration geologist and is both a registered geologist and licensed hydrogeologist.

  • Alan Edwards

    Regional Manager - Europe Alan Edwards

    Alan is the leader of SLR’s European Region and works closely with SLR’s Executive & European Management Teams to strategically develop and grow SLR’s operations in Europe.  He has over 30 years’ experience as an environmental consultant, working across a variety of industries, and a hydrogeologist with particular experience and knowledge of karstic and peat environments. He has also held various senior leadership positions for the past 15 years.


  • Craig Johnston

    Regional Manager - Canada Craig Johnston

    Craig is responsible for the growth and operational management of SLR’s Canadian region.  Over his 25+ year consulting career, Craig has held operational, technical and sector focused leadership roles within the environmental consulting sector.  In addition to his leadership role, Craig’s technical background is in hydrogeology where he focuses on the areas of groundwater supply development and protection, contaminant hydrogeology, and impact assessment related to resource development projects.

  • Paul Gardiner

    Regional Manager - Asia-Pacific Paul Gardiner

    Paul is SLR’s Asia-Pacific Regional Manager with over 30 years’ national and international experience across the private and public sectors. During his career, Paul has led and developed high performing teams globally as they venture into new markets growing businesses both organically and through mergers and acquisitions. Since joining SLR in late 2016, Paul has led the growth and diversification of the Asia-Pacific business through the addition of new technical disciplines and geographic locations to address changing market conditions and business development opportunities. Paul is also a member of Consult Australia’s Male Champions of Change group and is committed to actively promoting gender equality across SLR in the Asia-Pacific region and also more broadly in the consulting sector.

  • Rob Hounsome

    Regional Manager - Africa Rob Hounsome

    Rob is SLR’s African Regional Manager and has more than 25 years’ experience as a leader responsible for consultancy teams across diverse engineering and scientific disciplines in multiple locations.  In addition to his leadership roles, Rob has extensive experience in undertaking complex Environmental and Social Assessments, Due Diligence studies and fulfilling Environmental Technical Advisor roles for projects in their developmental or operational phases.  His global experience includes leadership and project delivery in more than 30 countries mainly in Africa, the Middle East and Asia.  He has particular technical expertise is in the Industrial, Energy and Mining sectors and has led teams focused on the Infrastructure and Built Environment markets.

  • Robert Leeming

    Non-Executive Director Robert Leeming

    Robert is a partner at Charterhouse and was appointed to the SLR board in June 2018. He joined Charterhouse in 2007. He was formerly a partner at EPIC Private Equity, prior to which he worked on due diligence and strategy assignments at PricewaterhouseCoopers. Robert has a degree in Natural Sciences from Cambridge University and an MBA from INSEAD.

  • Chris Warren

    Non-Executive Director Chris Warren

    Chris is a partner at Charterhouse and was appointed to the SLR board in June 2018. He joined Charterhouse in 2013 having previously spent ten years with ECI Partners where he completed a number of transactions across a wide range of sectors.

    Prior to ECI, Chris worked at BC Partners and before that as a consultant with COBA in their Strategy and Private Equity group. Chris has a degree in PPE from Oxford University and an MBA from INSEAD.