Assessment & Evaluation Advisory

Partners in Evaluation Excellence

Institutional Performance, Assessment and Evaluation Advisory Services

The GBPG Evaluation Advisory Team supports governments, development partners, and organizations in assessing the effectiveness, efficiency, and impact of programs and projects. Our team brings together international expertise and local knowledge to deliver evidence-based recommendations, strengthen institutional capacity, and ensure that evaluations contribute directly to better policy, planning, and implementation.

Our Approach to Evaluation Excellence

Focused on better outcomes

We follow global best practices in evaluation, guided by principles of transparency, independence, and stakeholder engagement. Our methodology is tailored to context, applying mixed methods and participatory approaches to capture both measurable outcomes and meaningful insights.

Program & Project Evaluation

Mid-term, final, and ex-post evaluations.

Impact Assessment

Measuring outcomes against baseline and planned objectives.

Institutional Performance Reviews

Assessing governance, systems, and processes.

Evaluation Framework Development

Designing monitoring and evaluation (M&E) systems.

Capacity Building

Training and mentoring in evaluation methodologies and tools.

Learning Facilitation

Turning evaluation results into actionable learning.

Program & Project Evaluation

Mid-term, final, and ex-post evaluations.

Impact Assessment

Measuring outcomes against baseline and planned objectives.

Institutional Performance Reviews

Assessing governance, systems, and processes.

Evaluation Framework Development

Designing monitoring and evaluation (M&E) systems.

Capacity Building

Training and mentoring in evaluation methodologies and tools.

Learning Facilitation

Turning evaluation results into actionable learning.

Beyond Traditional Performance Metrics

Capturing outcomes through context-driven approaches

At GBPG we understand that evaluating institutional performance in multilateral and humanitarian settings is a complex business and requires a fundamentally different approach and a departure from traditional methodologies employed in national contexts. Multilateral institutions and international development organizations operate across diverse geographical and cultural landscapes and must balance the often-competing interests of multiple member states or donors, each with their own priorities, political dynamics, and accountability systems. The nature of their mandates dictates that performance is not solely measured by outputs or efficiency metrics, but also by less tangible and longer-term outcomes. These dimensions are inherently more complex to assess and often fall outside the scope of conventional performance indicators, requiring context-sensitive evaluation frameworks.

Beyond Traditional Performance Metrics

Focused on better outcomes

Our Experts

Empowering people and organisations with purpose turning knowledge into action

Our team brings together global experience and deep technical expertise to strengthen organisations, build accountable systems, and create sustainable solutions. By turning knowledge into action, we help partners achieve results that endure and drive meaningful change.

Malcolm De Silva

Team Leader

Malcolm De Silva

An international management consultant with extensive experience supporting governments, multilateral organisations, and national entities. His expertise covers procurement, compliance, legal and contracting, and third-party risk management, together with governance and accountability reforms. He has undertaken advisory and staff roles with UNIDO, UNRWA, the Global Center on Adaptation, the European Space Agency, the International Atomic Energy Agency, the European Bank for Reconstruction and Development, the Asian Development Bank, the Commonwealth Secretariat, the International Criminal Court, and the Comprehensive Nuclear-Test-Ban Treaty Organization.
His work spans governance reform, audit response, and the design of institutional processes in highly specialised settings. He brings a comparative perspective on how multilateral organisations function in practice, combining formal frameworks with the realities of institutional culture. His approach ensures that organisational assessments link indicators and benchmarks with day-to-day operational dynamics, capturing both the systems and behaviours that enable—or hinder—institutional performance and results.

Kewal Thapar

Project Manager / Team Leader

Kewal Thapar

An international leader with over 30 years of experience strengthening programmes and institutions across multilateral, governmental, and partnership settings. At the World Bank, he held senior positions that combined operational management with fiduciary oversight, including Director of Trust Funds and Partnerships, where he managed large-scale global initiatives such as the Water and Sanitation Program and the Korea Green Growth Trust Fund. He also designed the Public-Private Infrastructure Database, now the global reference standard.
Her advisory work spans UN agencies, humanitarian organisations, and international partnerships, offering direct insight into strategy-setting, resource mobilisation, and results delivery. He currently chairs the Technical Committee of the Global Water Partnership and serves on the boards of UNITAR, Global Water Challenge, Safe Water Network, and the Sanitation Collaborative Council. Recognised internationally for leadership and gender equality, he combines governance, fiduciary, and evaluation expertise that is essential for institutional assessment and reform.

Jaehyang So

Project Manager / Team Leader

Jaehyang So

An international leader with over 30 years of experience strengthening programs and institutions across multilateral, governmental, and partnership settings. At the World Bank, she held senior positions that combined operational management with fiduciary oversight, including Director of Trust Funds and Partnerships, where she managed large-scale global initiatives such as the Water and Sanitation Program and the Korea Green Growth Trust Fund. She also designed the Public-Private Infrastructure Database, now the global reference standard. Her advisory work spans UN agencies, humanitarian organisations, and international partnerships, offering direct insight into strategy-setting, resource mobilisation, and results delivery. She currently chairs the Technical Committee of the Global Water Partnership and serves on the boards of UNITAR, Global Water Challenge, Safe Water Network, and the Sanitation Collaborative Council. Recognised internationally for leadership and gender equality, she combines governance, fiduciary, and evaluation expertise that is essential for institutional assessment and reform.

Malcolm De Silva

Team Leader

Malcolm De Silva

Kewal Thapar

Project Manager / Team Leader

Kewal Thapar

A consultant and governance reform leader with more than 30 years of global experience across multilateral development banks, UN agencies, humanitarian organisations, and governments. His contributions include advancing project management and procurement reforms with the Asian Development Bank, strengthening food security and social protection with the World Food Programme, and improving accountability and efficiency in humanitarian operations. At KPMG and later at GBPG, he drove institutional benchmarking and the adoption of best practices across sectors.
He began his career in the Indian Civil Service as Deputy Accountant General (Audit) and Under Secretary (Finance), where he built a strong foundation in accountability and oversight. Since then, he has held leadership roles across international financial institutions, UN agencies, and humanitarian programmes, consistently delivering evaluations, analytical studies, and lessons-learned exercises. He brings a trusted record of strengthening governance systems, institutional capacity, and sustainable development outcomes—ensuring that organisations meet donor requirements and deliver results effectively.

Jaehyang So

Project Manager / Team Leader

Jaehyang So

An international leader with over 30 years of experience strengthening programmes and institutions across multilateral, governmental, and partnership settings. At the World Bank, she held senior positions that combined operational management with fiduciary oversight, including Director of Trust Funds and Partnerships, where she managed large-scale global initiatives such as the Water and Sanitation Program and the Korea Green Growth Trust Fund. She also designed the Public-Private Infrastructure Database, now the global reference standard.Her advisory work spans UN agencies, humanitarian organisations, and international partnerships, offering direct insight into strategy-setting, resource mobilisation, and results delivery. She currently chairs the Technical Committee of the Global Water Partnership and serves on the boards of UNITAR, Global Water Challenge, Safe Water Network, and the Sanitation Collaborative Council. Recognised internationally for leadership and gender equality, she combines governance, fiduciary, and evaluation expertise that is essential for institutional assessment and reform.

Prof. Jason Blazakis

Team Leader

Prof. Jason Blazakis

A strategic executive and national security leader with extensive experience in counterterrorism, sanctions, and governance. His career spans senior roles in government, academia, and advisory services, providing insight into institutional responses to global security challenges. As Director of the Center on Terrorism, Extremism, and Counterterrorism at the Middlebury Institute, leads interdisciplinary teams and builds capacity among international partners in fragile contexts. Expertise in sanctions, institutional integrity, and security governance informs organisational assessments, particularly in risk management, compliance, and accountability. Advisory work covers governments, UN agencies, IFIs, and humanitarian organisations, ensuring assessments are rigorous, inclusive, and constructive. Recognised internationally, also leads on confidentiality and safeguarding, maintaining integrity in sensitive institutional reviews. Brings operational and advisory experience that ensures evaluations capture both institutional systems and their impact on results.

David Baxter

Team Leader

David Baxter

An international advisor and evaluator with extensive experience in governance reforms, infrastructure, and public–private partnerships (PPPs). His career has focused on helping organisations and governments deliver large-scale development initiatives through partnerships that mobilise private finance and expand essential services. He has worked with the World Bank, Asian Development Bank, DAI, and IP3/Tetra Tech on programme design, monitoring, and evaluation in diverse contexts. His expertise lies in applying international standards of transparency, accountability, and value for money to institutional and partnership reviews. He has evaluated governance systems, resource mobilisation strategies, and the sustainability of partnerships, ensuring that organisations meet global benchmarks. By linking technical frameworks with operational realities, he ensures that organisational assessments capture both system design and on-the-ground impact. Recognised for translating complex technical issues into practical evaluative insights, he contributes to actionable, high-quality institutional reviews.

Dr. Richard Stern

Team Leader

Dr. Richard Stern

A global governance and tax policy expert with more than 30 years of experience advising governments, multilateral institutions, and international organisations. He has held senior positions at the World Bank, International Monetary Fund (IMF), Asian Development Bank, and Ernst & Young, giving him a unique combination of multilateral, bilateral, and private sector perspectives.His work in over 70 countries has focused on fiscal governance, tax reform, and institutional capacity-building, often in fragile and transitional contexts. His evaluative expertise is closely aligned with organisational assessments, applying rigorous criteria to measure strategic relevance, operational efficiency, and the quality of partnerships. He brings deep experience in governance and reform evaluation, ensuring that organisational assessments capture both the technical reforms and the institutional dynamics that shape performance and results.

Costanza Matafù

Team Leader

Costanza Matafù

A development professional with extensive expertise in programme management, evaluation, and gender-responsive monitoring. Costanza experience spans bilateral and multilateral partners in fragile and crisis-affected contexts, offering deep insight into UN agencies, humanitarian organisations, IFIs, and global partnerships. Her assignments include leading the EU Trust Fund–funded WE-RISE! programme in Sudan, overseeing monitoring, audits, and programme redesign during crises. Contributed to gender-responsive monitoring with SIGI/Jo in Jordan and led strategic reviews in Iraq with AICS Amman. Multilingual in English, Arabic, and Italian, with working knowledge of Turkish, combines analytical rigour with a human-centred approach. Expertise in gender equality, GBV prevention, and intercultural facilitation strengthens organisational assessments by ensuring inclusion, accountability, and responsiveness to diverse contexts. Provides comparative insight on how organisations adapt interventions and ensures evaluations reflect both institutional systems and community-level outcomes.

Prof. Jason Blazakis

Team Leader

Prof. Jason Blazakis

David Baxter

Team Leader

David Baxter

Dr. Richard Stern

Team Leader

Dr. Richard Stern

A global governance and tax policy expert with over 30 years of experience advising governments, multilateral institutions, and international organisations. Senior positions at the World Bank, IMF, Asian Development Bank, and Ernst & Young provide a rare mix of multilateral, bilateral, and private sector perspectives. Work in more than 70 countries includes guiding fiscal governance, tax reform, and institutional capacity building in fragile and transitional contexts. Leadership at the World Bank and IMF involved major fiscal reform programmes, while at EY he managed multi-country initiatives integrating policy design with operational delivery. Evaluative expertise aligns closely with organisational assessments, applying criteria to assess strategic relevance, operational efficiency, and partnerships. Brings governance and reform evaluation experience that ensures organisational assessments capture both technical reforms and institutional dynamics influencing performance and results.

Costanza Matafù

Team Leader

Costanza Matafù

Consultants

to the Development World ™