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Sally Bridgeland

Chair

Sally joined the board as a Non-Executive Director in July 2015 and was appointed Chair in December 2020. Sally is a member of the Remuneration Committee.

She is currently a non-executive director of Pension Insurance Corporation plc and Royal & Sun Alliance Insurance Limited, having worked in the UK pensions industry for 30 years, and Chair of BelleVie Care Limited.

Originally qualifying as a Fellow of the Institute of Actuaries with consultants Bacon & Woodrow (now Aon), she was CEO of the BP Pension Fund from 2007-2014. Sally held a number of voluntary roles with the actuarial profession and was the first lady Master of the Worshipful Company of Actuaries 2016-17.

Ian Simm

Founder & CEO

Ian Simm is the Founder and Chief Executive of Impax Asset Management Group plc, one of the world’s leading investment managers dedicated to investing in the transition to a more sustainable economy. Prior to Impax, Ian was an engagement manager at McKinsey & Company advising clients on environmental strategy.

Outside Impax, Ian is a member of the UK government’s Net Zero Innovation Board, which provides strategic oversight of public sector funding of energy innovation programmes and is a board member of the Institutional Investors Group on Climate Change, the European membership body for investor collaboration on addressing climate change. He is also a commissioner with the Energy Transitions Commission, a global coalition of leaders developing transition roadmaps to achieve net-zero emissions. Between 2013 and 2018, he was a board member of the Natural Environment Research Council (NERC), the UK’s leading funding agency for environmental science. He supports charities in the clean energy, healthcare and a range of scientific and environmental sectors.

Ian has a first-class honours degree in physics from Cambridge University and a Master’s in Public Administration from Harvard University. In the last century he initiated and led an expedition to complete the first summer crossing of the Sahara Desert by tandem bicycle.

Recent Insights

Julia Bond

Non-Executive Director

Julia joined the Board as a Non-Executive Director in November 2023 and is a member of the Company’s Audit & Risk and Remuneration Committees.

Julia has deep experience of capital markets in the financial services sector. She is a former Managing Director at Credit Suisse where she led the Central Bank and Sovereign Wealth Fund teams globally as well as co-heading Non-Japan Asia Fixed Income Sales. Julia serves as a Non-Executive Director to several private and public sector organisations, including UK Strategic Command, the British Foreign and Commonwealth Development Office, and International Public Partnerships.

Lindsey Brace Martinez

Non-Executive Director

Lindsey joined the Board as a Non-Executive Director in July 2015 and is a member of the Remuneration Committee, which she also Chairs, and the Audit and Risk Committee. Lindsey is the Board sponsor for Equity, Diversity & Inclusion.

Lindsey served as a member of the Executive team and was a Managing Director at Cambridge Associates. She held multiple roles during her 15-year tenure at the firm including Global Head of several areas covering Client Service and Relations, Business Development and Client Relationship Management, and Consulting.

She is the Founder and CEO, StarPoint Advisors, LLC; Co-Chair of the Advisory Board for the Center for Business and Environment at Yale (CBEY);  Chair, People and Culture Committee, Onward Energy; Trustee, Impax Funds; and Board member, Seven Islands Lands Company.

Lindsey holds an MBA (finance and strategy) and a Master of Environmental Studies from Yale University and a Bachelor of Arts from Dartmouth College.

She has 30 years’ experience in investment advisory, natural resources portfolio management, institutional marketing and sales, and management consultancy.

Lyle Logan

Non-Executive Director

Lyle joined the Board as a Non-Executive Director in May 2024 and is a member of the Company’s Audit & Risk and Remuneration Committees.

Lyle has considerable experience within the wealth, asset management and asset servicing space. He is currently Vice Chairman of Northern Trust, the latest role in a career within the Chicago-based financial services company spanning more than 20 years. Prior to joining Northern Trust, Lyle worked at Bank of America (formerly Continental Bank) in Chicago, where he held several leadership positions, including as a Senior Vice President in the Private Bank and Domestic Portfolio Management Group.

He serves as a Non-Executive Director to several organisations, including The Field Foundation of Illinois, Heidrick & Struggles International and Ann & Robert H. Lurie Children’s Hospital of Chicago.

Lyle holds a B.A. degree in Accounting and Economics from Florida A&M University and an M.B.A. degree in Finance from the University of Chicago.

Simon O’Regan

Non-Executive Director

Simon joined the board as a Non-Executive Director in December 2020 and is a member of the company’s Audit & Risk and Remuneration Committees and the Senior Independent Director.

Simon has forty years’ experience in the insurance, pensions and asset management industries. He is a UK qualified actuary by training and has lived and worked in six countries around the world including as CEO of Mercer in Australia, in the UK, in Europe and in the USA/ Canada. He was a member of the UK’s Nuclear Liabilities Financing Assurance Board until it submitted its final advice on Hinkley Point in 2015 and served as a Non-Executive Member of the Foreign, Commonwealth and Development Office’s Audit & Risk Assurance Committee. He was formerly a Non-Executive Director of Alexander Forbes Group Holdings Ltd and Mercer Africa Limited.

Arnaud de Servigny

Non-Executive Director

Arnaud joined the board as a Non-Executive Director in June 2018.

He currently holds a non-executive directorship at BNP Paribas Asset Management France and is President of Queens Field SAS. He was previously a Managing Director at Deutsche Bank Asset Management and has also worked at Barclays Wealth, Standard & Poors and BIM private equity fund. Arnaud has been a visiting Adjunct/ Professor of Finance at Imperial College Business School since 2005 and is the author of several books on finance, economics and investment management.

Annette Wilson

Non-Executive Director

Annette joined our board in June 2022 and is a member of the Audit & Risk Committee, which she chairs, and the Remuneration Committee.

With more than 20 years’ experience in the private equity and venture capital sectors, Annette brings with her a wealth of experience from her previous roles as Partner and COO of Finch Capital, and as founding CFO of Palamon Capital Partners, a European growth investor. Annette also worked in the insurance industry for FTSE 100-listed company, Sedgwick, an insurance broker, and as Chief Financial Officer for LSE-listed Windsor. She started her career at PricewaterhouseCoopers.

Annette is a graduate of the University of Johannesburg. She is a Fellow of the Institute of Chartered Accountants in England and Wales and a member of the South African Institute of Chartered Accountants. She serves as a non-executive director and adviser to several international companies, and is also founder and Chair of the Board of Trustees of ADHD Embrace, a UK-registered charity.

Hubert Aarts

Deputy Chief Investment Officer (CIO), Listed Equities

Hubert serves as Deputy CIO, Listed Equities and is a co-Portfolio Manager of the Impax Leaders and Water strategies. Hubert is a key figure overseeing Impax Asset Management’s investment strategies in the listed equities space and is jointly responsible for the development of our investment process, research, and team. He also researches stocks globally, specialising in industrials and consumer discretionary companies.

Prior to joining Impax in 2007, Hubert was a partner at Cambrian Capital. He also spent nearly a decade at BlackRock working as a portfolio manager in European equities. His first role was at MeesPierson in The Netherlands.

Hubert has a master’s degree in Economics and Business Administration from Maastricht University.

Recent Insights

Lisa Beauvilain

Global Head of Sustainability & Stewardship, Co-Head Sustainability Centre

Lisa co-heads the Impax Sustainability Centre. As the Global Head of Sustainability & Stewardship she is responsible for sustainability and stewardship in Impax’s investments and for the sustainability insights in the firm’s Beyond Financial Returns activities, such as product development and reporting. She co-chairs Impax’s Sustainability Lens committee and is a member of Impax’s Senior Leadership Team.

Lisa joined Impax in 2010. She started working in the financial industry in 1999 and previously worked as an executive director in the Investment Management Division of Goldman Sachs in London.

She is actively participating in industry working groups and advisory councils furthering sustainable practices in industry organisations such as the Glasgow Financial Alliance for Net Zero (GFANZ) and the International Corporate Governance Network (ICGN). She is a member of the Nominations Board of Kemira Oyj, Finland and a former Trustee of the International Institute of Environment and Development (IIED).

Lisa has an MSc in Environment and Development from the London School of Economics and an MSc in Finance from the Hanken School of Economics, Finland.

Recent Insights

Addressing PFAS: Solutions to the forever challenge

We believe the urgent need to detect, treat and destroy ‘forever chemicals’ in the world’s water is creating investment opportunities that are broader and more valuable than many appreciate

25 March 2024

John Boese

Global Head of Compliance, CCO, North America

As Impax’s Global Head of Compliance, John oversees the firm’s teams managing global compliance efforts. John is also Chief Compliance Officer, North America, ensuring compliance with applicable laws, industry regulations and required policies and procedures.

Prior to joining the firm in 2006, John served as Vice President of Legal and Compliance, and then Vice President and Chief Regulatory Officer at the Boston Stock Exchange from 2000-2006. Before that, he held various legal and compliance positions at T. Rowe Price and Chase Bank. He also served as an Assistant Prosecutor for Monmouth County, New Jersey, from 1988 to 1990.

John earned his Juris Doctor from Vermont Law School and also holds a bachelor’s degree in Political Science, cum laude, from Rutgers University. He is a member of the New Jersey Bar.

Catherine Bremner

Chief Strategy Officer

Catherine is Impax’s Chief Strategy Officer. She is responsible for leading our business strategy, including corporate development activities and for leading the build of Impax/s digital strategy, inclusive of our data architecture and AI capability. With over 25 years of experience in sustainable development, finance, strategy and change management, she is also a highly respected leader in green finance.

Before joining Impax in 2021, Catherine spent five years at the UK Government’s Department for Business, Energy & Industrial Strategy, including acting as Director General, responsible for around 500 staff tasked with developing the UK’s Net Zero Strategy and International Climate and Energy policy. She also chaired the UK Government’s Climate and Energy G7 Presidency in 2022. Before this, she was Global Head of Environmental Sustainability at Australian financial services firm ANZ. She was also Chief Operating Officer at Low Carbon Australia and Head of International Development at the Carbon Trust.

Outside of Impax, Catherine is on the Board of the Met Office and is the Chair of its Remuneration Committee.      

Catherine holds a Master’s degree in Public Policy from the London School of Economics, a master’s degree in Environmental Science and Management from Oxford University and a bachelor’ degree (Hons 1st) in Chemical Engineering from The University of Queensland.

Emily Cassidy

Chief Risk Officer

Emily serves as Impax’s Chief Risk Officer, managing the group risk and compliance teams. She is responsible for implementing and overseeing Impax’s Enterprise Risk management framework and is Chair of the Enterprise Risk Committee.

Emily joined Impax in 2021, where she worked initially as Head of Compliance for Impax’s Irish operations, before moving to her current role in October 2022.  Emily is an Irish qualified lawyer. 

Prior to Impax, Emily was a legal adviser in private practice and in the Central Bank of Ireland before moving to senior compliance roles in BlackRock, LGIM and Eaton Vance.  

Karen Cockburn

Chief Financial Officer

Karen Cockburn is Impax’s Chief Financial Officer. She is responsible for overseeing Impax’s Finance, Investor Relations, People and Legal functions, as well as Governance processes. As a member of Impax’s Management Committee, she contributes to the Firm’s commercial and strategic business matters. Karen is also an Executive Director on the Board of Impax Asset Management Group plc.

Karen is a qualified Chartered Accountant with over 25 years’ financial and operational experience in financial services. Before joining Impax in 2022 Karen was transformation CFO at Virgin Money plc, focused on the integration of Virgin Money and Clydesdale Banking Group. Prior to that she spent nine years at Aegon in various strategy, transformation and finance leadership roles, laterally as Chief Financial Officer of Cofunds. Having qualified with KPMG, she spent her early career with GE Capital, a global financial service provider, and Lloyds Banking Group. Karen is also a founder and board member of a digital start up, Legado Technologies Ltd.

Karen is a fellow of the Irish Institute of Chartered Accountants and holds a BSc and MSc in Finance /Accounting from Queen’s University, Belfast.

Ed Farrington

President, North America

Ed is President, North America at Impax Asset Management and Co-Head of the Client Group. Based in the Portsmouth office, Ed is responsible for distribution of Impax’s full capabilities across North America. Ed previously served as the Head of Distribution for North America. In this capacity, he oversaw institutional and intermediary sales and client service efforts, engaging with consultants, advisers, institutions and plan sponsors on issues ranging from investing in the transition to a more sustainable economy to navigating global retirement systems.

Ed joined Impax in 2021 from Natixis Investment Managers where he held multiple distribution leadership roles in London and Boston over the span of 12 years. Prior to that, he worked in sales and sales management for Fidelity Investments, Fidelity Charitable Services and Pioneer Investments.

With a bachelor’s degree in political science from the University of New Hampshire, Ed also holds the FINRA Series 6, 7, 24, and 31 registrations, and is a registered representative of Foreside Financial Services, LLC. He serves on the World Surf League advisory board, the Levitate Foundation and the sustainability advisory board at the University of New Hampshire.

Recent Insights

Charles French

Co-Chief Investment Officer (CIO), Listed Investments

Charles serves as the Co-Chief Investment Officer providing leadership in the development and growth of the Impax Asset Management’s listed investments business, covering research, idea generation, portfolio management, ESG integration, and trading. He also focuses on overseeing the growth of Impax’s fixed income proposition, as well as the further development of research. Charles is also the co-Portfolio Manager of the Impax Global Social Leaders strategy.

Prior to joining Impax Asset Management in 2022, Charles worked at Newton Investment Management where he started out as a global financial analyst before becoming a portfolio manager and heading up Newton’s multi-asset and equity opportunities teams. He was also deputy chief investment officer, providing leadership and oversight to a global investment team.

Charles graduated with a bachelor’s degree in Economics from the University of Nottingham. He is also a member of the Institute of Chartered Accountants (ICAEW) in England and Wales.

Recent Insights

Portrait of Dineen Forest

Dineen Forest

Head of Human Resources, North America

Dineen is responsible for leading the human resources strategy in North America. Dineen works closely with the London human resources team to build out the North American HR initiatives including recruitment, diversity & inclusion, compensation & benefits, employee engagement, and talent development.

Prior to Impax, Dineen held leadership positions supporting companies with hyper growth, whether organically or through mergers and acquisitions. Dineen studied Human Resource Management and Women in Leadership.

Bruce Jenkyn-Jones

Co-Chief Investment Officer (CIO), Listed Investments

Bruce serves as Impax’s Co-Chief Investment Officer, Listed Investments. Bruce is one of Impax Asset Management’s longest-serving employees. He developed the firm’s listed equities business and the division’s investment thesis. He is responsible for overseeing and enhancing all aspects of the listed investments business, including monitoring performance, ensuring regulatory compliance, and spearheading product design. Bruce is a co-Portfolio Manager of the Impax Specialists and Climate strategies.


Before joining Impax in 1999, Bruce worked as a utilities analyst at Bankers Trust and as an environmental consultant for Environmental Resources Management.

An Oxford graduate with a bachelor’s degree in Chemistry, Bruce also holds a master’s in Environmental Engineering Technology, and an MBA from IESE Business School in Barcelona.

Darren Johnson

Global Chief Operating Officer

Darren Johnson is Impax’s Chief Operating Officer. He sits on our Management Committee and is responsible for operations throughout the organisation. He has held this role since joining in 2007 and in that time has driven operational transformation, built teams and pioneered the company’s transition into cloud services to support rapid growth.

Prior to Impax, Darren held a similar role for family office Talisman Global Asset Management and his previous experience has included roles at RAB Capital, AXA Investment Managers, and Legal & General.

Darren sits on the board of several charities and organisations, including St Mungo’s, the UK’s largest homeless charity, and the investment advisory board of Comic Relief. He is a prominent advocate of diversity issues across financial services, is co-founder of TalkAboutBlack, sits on the CIC board of the Diversity Project, which aims to accelerate progress towards an inclusive culture in the investment and savings industry, and is on the Standing Committee for Investment 20/20, an organisation providing school leavers and graduates from non-traditional backgrounds with opportunities in asset management.

Adrian Missen

Country Head, Ireland

Adrian is responsible for managing the daily operations of Impax Asset Management Ireland (IAMI) which is the appointed management company to the Impax UCITS fund umbrella and also the entity that manages distribution of Impax funds and services across Europe. He also serves as a Director of the IAMI Board.

Adrian joined Impax in 2021 to establish and grow the newly authorised IAMI management company. Prior to Impax, Adrian worked as Senior Vice President of Kleinwort Benson Investors (now KBIGI), with responsibility for marketing and distributing to institutional clients in the North American market, and more recently with BCP Asset Management in Ireland where he was a member of the investment committee, Head of Client Development and a Director of BCP Fund Management which focused on providing regulated fund services to domestic, UK and European clients.

Adrian holds a bachelor’s degree in business and legal studies (International) from University College Dublin.