Large and complex public sector organisations have much to gain from streamlining internal and external data sharing. Better citizen services, improved healthcare, cleaner environment and a fairer, more inclusive society can be accelerated by timely access to quality data. There are proven techniques to consolidate siloed systems and processes but achieving consensus between internal and external stakeholders is much harder. Very often data consumers, data custodians, data stewards, and data owners struggle to agree on a common strategic vision because they measure value differently. In this insightful presentation, Colm Hayden, CTO of Data Engineering specialist Anaeko, outlines from experience his 5 critical lessons to successfully engage data stakeholders in transformative data strategies.