Gresham House Sustainable Investment Report 2024

As Sustainable Investment Director, Hyewon leads Gresham House’s Sustainable Investment team and strategy, driving environmental, social and governance (ESG) efforts across the firm and its investment strategies.

With over 20 years of global experience spanning Asia, Europe and North America, Hyewon has held senior executive roles in corporate and investment management, managing sustainable and impact investment portfolios, as well as developing and implementing sustainability and net zero climate strategies.

Before joining Gresham House, Hyewon was Head of Responsible Investing at the Investment Management Corporation of Ontario (IMCO), where she spearheaded sustainable investment strategies and led ESG integration across public and private markets and all asset classes. Prior to this, she was Assistant Vice President and Head of ESG at AGF Investments, managing approximately $600 million through the firm’s global sustainable and impact investing strategies.

Hyewon has served on various boards and committees throughout her career, including as an Investment Committee member at The Atmospheric Fund (Ontario Government Province Endowment) and as an Environmental Finance Advisory Committee member at the University of Toronto. Currently, she is a member of the Board of Directors at the University of British Columbia (UBC) Investment Management and lectures on environmental finance and sustainable & impact investment courses.

Hyewon founded and chaired the Canadian Responsible Investment Working Group and was named as one of Canada’s Clean 50 leaders in 2020 for fostering collaboration within the financial industry to advance a sustainability agenda.

She holds a Master of Science in Environmental Policy from the University of Oxford and is a CFA charterholder.

James joined Gresham House in May 2024 as Sustainable Investment Manager.

Before joining Gresham House, James worked at Jupiter Asset Management as an ESG analyst within the ESG Research & Integration team where he supported investment managers in embedding ESG into investment processes. His work primarily focused on, climate risk, biodiversity, human rights, and human capital as well as stewardship activities including engagement with investee companies, proxy voting and ensuring good governance. James supported the implementation of new sustainability related regulation and disclosure in addition to policy writing and report writing.

Prior to this, James worked within PwC’s Sustainability & Climate Change team for nearly 3 years on a variety of projects primarily specialising in ESG strategy for large corporates and Private Equity firms as well as corporate security strategy and health & safety. He spent time managing digital transformations and operational excellence productivity improvements for clients globally whilst supporting other areas of the firm on risk assurance and deals.

James holds a BA (Hons) in Anthropology and African Studies from the University of Birmingham, CFA certificate in ESG Investing, Certificate in Sustainable Business Strategy and NEBOSH International General Certificate in Occupational Health & Safety.

Maddie joined Gresham House in December 2023 as a Sustainable Investment Analyst.

Before joining Gresham House, Maddie worked at Lombard Odier as a Quantitative Analyst within the Sustainable Investment Research team. Her work was focused primarily on physical risk modelling but also included assessing companies against sustainability criteria and most recently researching investable opportunities within nature including carbon credits and nature-based solutions. Prior to this, Maddie worked at Atkins Realis as a geospatial analyst, conducting analysis for environmental impact assessments of engineering projects.

Maddie holds and MSc in Geospatial Science and Remote Sensing and a first-class degree in Environmental Science, both from the University of Southampton.

Jay joined Gresham House in June 2025 as a Sustainable Investment consultant to lead Gresham House’s Net Zero and Nature Strategy development.

Before joining Gresham House, Jay was a Managing Director at Accenture, where he was the global lead for sustainability within Accenture’s private equity practice, advising PE financial sponsors and their portfolio companies on how to embed sustainability to unlock value throughout the deal lifecycle. Jay also co-led the UK Sustainable Financial Services business, supporting investment banks, asset managers and insurance companies develop sustainable investment products, services and strategies.

Prior to joining Accenture, Jay spent over 15 years as a sustainable investor. He started his career at a $1.3bn hedge fund in London within which he launched and co-managed a long-short portfolio investing across renewable energy, alternative energy technology, biofuel and carbon, before spending the next 10+ years in private markets from Base of the Pyramid venture capital in India, to sustainable real assets in APAC.

Jay holds a BA in Archaeology from UCL and is a CFA charterholder.

Pedro is an ESG and sustainability specialist at Gresham House with a focus on the firm’s Energy Transition division. He became part of the Gresham House team in January 2026 following its acquisition of SUSI Partners, which he had joined in 2024.

Prior to this, Pedro worked at Zurich Insurance in the responsible investment team as a working student. He supported impact investing, ESG integration and climate action investment work. His work focused on impact measurement and reporting for fixed income, infrastructure and private market assets, as well as ESG analysis of internal and external asset managers. He also led projects to digitalise impact measurement processes and helped develop internal responsible investment training.

Pedro has over three years of experience in sustainable investing. He holds a Master of Science in Business Administration from the Lucerne University of Applied Sciences and a Bachelor of Arts in Business Administration from Karel de Grote University of Applied Sciences. He also holds the CFA Certificate in ESG Investing and is a Certified Expert in Climate and Renewable Energy Finance from the Frankfurt School of Finance and Management.

In addition, Pedro is fluent in four languages and has an entrepreneurial background from running his own personal training business.

Siaw Fun is the ESG Manager for Gresham House’s Asia business. She joined Gresham House in January 2026 following its acquisition of SUSI Partners.

Siaw Fund had joined SUSI Partners in 2024 to lead ESG efforts for the firm’s Southeast Asia-focused strategy. She is an ESG professional with more than 13 years of practical experience in the conduct of environmental and social due diligence, impact assessments, implementation and monitoring of environmental and social management systems focused on the energy sector in Asia.

Prior to joining SUSI, Siaw Fun was E&S Manager at EDF HQ Singapore, a leading global electric utility company where she was responsible for developing ESG governance procedures, screening for E&S risks, and implementing E&S policies across projects in Asia. She has also previously worked at Ramboll Environ where she gained regional power development ESG consulting experience.

James joined Gresham House in May 2024 as Sustainable Investment Manager.

Before joining Gresham House, James worked at Jupiter Asset Management as an ESG analyst within the ESG Research & Integration team where he supported investment managers in embedding ESG into investment processes. His work primarily focused on, climate risk, biodiversity, human rights, and human capital as well as stewardship activities including engagement with investee companies, proxy voting and ensuring good governance. James supported the implementation of new sustainability related regulation and disclosure in addition to policy writing and report writing.

Prior to this, James worked within PwC’s Sustainability & Climate Change team for nearly 3 years on a variety of projects primarily specialising in ESG strategy for large corporates and Private Equity firms as well as corporate security strategy and health & safety. He spent time managing digital transformations and operational excellence productivity improvements for clients globally whilst supporting other areas of the firm on risk assurance and deals.

James holds a BA (Hons) in Anthropology and African Studies from the University of Birmingham, CFA certificate in ESG Investing, Certificate in Sustainable Business Strategy and NEBOSH International General Certificate in Occupational Health & Safety.

Raphaela leads Gresham House’s sustainability agenda across its equity and credit strategies, partnering closely with investment and asset management teams to embed ESG considerations throughout the investment lifecycle. She aligns sustainability priorities with financial performance, translating ESG commitments into practical investment decisions that strengthen risk management and long-term value creation. She joined Gresham House in January 2026 following its acquisition of SUSI Partners.

Raphaela had joined SUSI Partners’ investment team in 2017 and later took on the responsibility of establishing and systematically integrating the ESG and Sustainability function at the firm. Earlier in her career, she built a foundation in renewable energy and infrastructure through roles in M&A and corporate finance at D.CT Deutsche Cleantech and structured finance at Deutsche Bank, and began her career at PwC.

She has additional postgraduate training in Finance, including a CAS in Sustainable Finance, and holds a BA in International Management.