About Us · Team and Advisors
Experience across chains,
geographies and industries
A team that has worked in, with and for global multinationals on their sustainability footprints and supply chains — from headquarters to the factory floor.
The team
Our team
Jeremy Prepscius
Managing Director
A seasoned sustainability leader with 25+ years of experience working in, with and for global MNCs on their sustainability footprints and global supply chains. Jeremy is the Managing Director of ILLÆSA, a sustainable supply chain and due diligence consultancy based in Hong Kong.
Prior to this, Jeremy was the Sustainable Supply Chain Lead in PwC Global Sustainability, where he provided specialist input to the delivery of Sustainable Supply Chain engagements across the region and globally.
Jeremy’s career began with NIKE, with significant time in the early days of NIKE’s supply chain / labour engagement including HQ, Vietnam and China.
Subsequently, Jeremy spent 16 years at BSR and was the Vice President for Asia Pacific leading BSR’s consulting and government / public engagements in the region. His consulting experience extends across a broad geography (from Papua New Guinea to Uzbekistan, Japan to Indonesia) and across a variety of industries (from tech to consumer products, food through energy and extractives).
William Hay
Associate
William is an Associate with a background in policy research and governance across Southeast Asia. Previously serving as a Policy Researcher at the KSI Strategic Institute for Asia Pacific, he authored several policy papers that were circulated to Malaysian ministries and ASEAN bodies.
His background also includes research work with the NGO Traffic, supporting analysis of illegal wildlife trade to inform more sustainable trade practices.
William holds a degree in Politics and International Relations from the University of Manchester. His work spans policy analysis, cross-cultural engagement, and translating research into practical recommendations, with a particular interest in governance and sustainability in the Asia Pacific region.
Advisors
Our advisors
Ouida Chichester
Senior Advisor, Energy, Extractives and Just Transition
A human rights and community engagement specialist with 20+ years of experience working with communities, governments and global corporations on social risk, stakeholder engagement and responsible business practice. Ouida is based in the San Francisco Bay Area.
Ouida spent nearly 15 years at BSR, where she led global human rights initiatives on strategy, due diligence, grievance mechanisms and remedy, and directed corporate-wide, remote and on-site human rights and labour assessments. Her consulting work has centred on the energy, oil and gas, and mining sectors — among the most complex and contested operating environments globally — with engagement spanning workers, contractors, communities, Indigenous peoples, NGOs and governments.
Her field experience spans Latin America (Peru, Chile, Argentina, Guatemala, Mexico), Asia-Pacific (Myanmar, Papua New Guinea, India), Africa (Ghana, Uganda, Ethiopia) and North America.
Ouida’s career began in international development, including service as a Peace Corps Volunteer in Ecuador and with the United Nations Development Programme in Belize on water governance, gender equality and disability rights. She is fluent in Spanish.
Phil Berry
Senior Advisor
Phil has served for 25 years in leadership positions (Director and Vice President) of global MNCs and consultancies leading sustainability, human rights and climate action programmes focused on global supply chain performance.
Phil served for twelve years as NIKE’s first Director of Sustainability, with leadership responsibility for the environmental performance of the entire Asian supply chain, including China, India, Indonesia and Vietnam.
Subsequently, Phil served as Director of Sustainability in Guangxi, China for Stora Enso Oyj. At Stora Enso, Phil designed and led one of the largest human rights assessment and remediation programmes undertaken by a corporation in China.
As a consultant, Phil has conducted more than 80 investigations of suppliers and supply chains in Asia, Latin America and Africa for risk of forced labour, child labour and prison labour. He has extensive experience improving the sustainability, human rights and climate performance of agricultural value chains.
Hayley Whatarau
Senior Advisor
An executive leader and qualified lawyer with two decades’ experience at the intersection of human rights, sustainability and commercial strategy. Hayley’s career has evolved from frontline advisory and facilitation roles to executive leadership across Fortune 500 companies, where she guides governance, strategy and institutional capability in some of the world’s most complex and high-risk operating environments.
She brings a disciplined approach to evaluating risk and defining strategy, enabling organisations to tackle today’s most pressing human rights challenges. In recent years, Hayley has sharpened this focus on the Global South, applying deep expertise in supply chain resilience, traceability and rights-holder-led design to deliver innovative solutions. Her practice is anchored in respect, stewardship and integrity, shaped by her Indigenous heritage from Aotearoa and the Torres Strait.
Hayley operates at the highest levels of influence: advancing long-term strategy, leading multi-party negotiation, and fostering deep trust across governments, institutions and multinational corporations. She works with organisations to build durable partnerships and step into their next phase of growth and influence.
Hayley’s corporate leadership roles include Global Human Rights Manager at HP and Regional Director (Asia) at Enodo Rights. Earlier in her career, she led international programmes at Tūhana, a business and human rights consultancy, and worked as a Legal Associate with the World Health Organization.
Hayley holds a Bachelor of Laws from the University of Auckland, master’s degrees from the University of Sydney and Mahidol University, and completed Professional Legal Studies at the College of Law Australia. She serves on the Board of Be Slavery Free and several other social impact boards.
Shweta Singh
Senior Advisor
A sustainability and ESG specialist with 10 years’ experience across mining, consulting, retail and global value chains, Shweta works across ESG governance, community and social performance, responsible sourcing, human rights and social impact. She connects governance discipline with operational realities of communities, suppliers, workers and delivery teams.
Most recently, Shweta spent five years at Rio Tinto, latterly as Senior Advisor, CSP Assurance & Governance, where she led the design and implementation of enterprise-wide Community & Social Performance governance and assurance mechanisms for Social Investment and Development Contribution reporting across 80+ operations in Australia, Asia, South Africa, Guinea, Singapore, the US and India, earning recognition from KPMG Australia for strengthening transparency and audit trails. She designed reporting, validation and assurance frameworks for a publicly reported USD 340M+ portfolio of social investment, development contributions and landholder payments, improving reporting accuracy by 20% and strengthening financial traceability through an SAP-linked reconciliation framework. She conducted 20+ ESG ratings, benchmarks and investor-facing disclosure processes, including CDP, DJSI, EcoVadis, Sustainalytics, and RMI.
Earlier, Shweta held sustainability consulting roles at Grant Thornton, PwC and KPMG, delivering projects across responsible supply chains, social impact and environmental and social risk, including SROI and impact assessments, IFC-aligned ESIA gap assessments, EHS and social audits, and supply-chain risk analysis. At Inditex, she led a socio-economic study of 2,500 homeworkers, strengthened ethical supply-chain compliance, and implemented the Better Homeworking Programme across 23 suppliers.
Shweta holds a Master of Arts in Social Work (Livelihoods and Social Entrepreneurship) from Tata Institute of Social Sciences (TISS), where her published research examined microfinance and women microentrepreneurs in Dharavi, Mumbai. She has completed the Communities & Social Performance Foundations Program through the University of Queensland’s Centre for Social Responsibility in Mining (CSRM). Her work draws on GRI, IFRS S1/S2, CSRD/ESRS, CSDDD, IFC PS and the OECD Guidelines.