Sustain+PFM provides operationally grounded advisory services, framework development, and technical support for public finance systems and climate governance. We work with Supreme Audit Institutions, international organisations, development banks, and governments on climate audit, sustainability reporting, fiscal sustainability, and public financial management reform.

This work applies a performance audit and public economics lens to climate and fiscal governance challenges in the public sector.

It builds on over 30 years of international experience across the UK National Audit Office, the European Court of Auditors, the OECD, and the United Nations system, including field-based work in Africa, Asia, Europe, and Latin America, and periods of residence and work in Bolivia. 

Our work focuses on helping institutions strengthen accountability, oversight, and implementation capacity in response to climate change and broader sustainability challenges. This ranges from advising international organisations on engagement with SAIs, to authoring practical guidance, delivering training, and providing technical support on audits, governance frameworks, and reform programmes.

Peter Welch, Lead Consultant
Sustain+PFM S.à r.l.-S, Luxembourg

 Focus areas

Climate Fiscal Risk

Assessment of the fiscal implications of climate transition and adaptation, including sovereign exposure, long-term liabilities, fiscal sustainability, and policy coherence across energy, environmental, and public finance systems.

Sustainability Reporting

Support on public sector sustainability disclosure, reporting frameworks, materiality assessment, and accountability mechanisms, including alignment with emerging international standards and evolving government reporting practices.

Climate Audit and Oversight

Development of practical climate audit methodologies, institutional strengthening approaches for Supreme Audit Institutions, and frameworks linking environmental governance to fiscal accountability and public sector performance.

Public Financial Management

Advisory support on governance, accountability, and institutional reform in evolving fiscal systems, including integration of sustainability and climate considerations into public financial management frameworks.

AI and Data in Audit

Exploration of emerging technologies, earth observation data, and AI-enabled approaches to strengthen public oversight, institutional performance assessment, audit evidence, and public financial management decision-making.

 Recent activities