Erwin Hieltjes

Erwin leads NPC’s projects related to data, impact and learning. He supports all types of social impact organisations to go from doing good to doing great. He has a relentless focus on impact, challenging peers, partners and clients to make evidence-led decisions on those things that matter.

Erwin has over 10 years of expertise in supporting organsiations with impact measurement, strategy and learning. He has a track-record of working on innovative approaches and does not steer away from challenging projects. He pushes organisations to think outside the box and find novel ways to measure and improve their impact. Recently, Erwin has supported numerous organisations to pioneer new approaches to systems change evaluation.

He has a keen eye for meaningful and proportionate evaluation, challenging the sector to use data that is already there and design new measures in an efficient and purposeful way. As an economist, he lets data analysis guide his decision making, ensuring conclusions are robust and sound. At the same time, he understands the importance of diverse voices and equitable evaluations to ensure findings are valid, valuable and relevant to all stakeholders, especially those with least power.

Erwin works closely with senior management teams and boards to ensure data and evidence are feeding into strategic decision making. He is a trusted advisor on topics such as data dashboards, operational excellence, the use of AI and culture change. He designs and leads large capability and capacity building programmes to ensure impact can be accelerated and delivered at scale.

Before joining NPC, Erwin set up his own social sector impact consultancy in the Netherlands (Impacters). During his career, Erwin has worked with and for charities, impact investors, venture philanthropists, corporates and large funders. Before moving into the not-for-profit sector, he was a strategy consultant at Booz & Company (now PwC Strategy&). Erwin holds a MSc. degree in Economics from the Stockholm School of Economics.

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Why I work at NPC

I use my background as an economist to support non-profits and funders in making better choices based on data-insights. Not just doing good, but doing best.

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