Killian runs EnergyTag's, a non-profit focused on enabling the real-time electricity tracking that will transform clean energy sourcing and redefine what it means for companies to be 100% renewable. Alongside the world's top experts, Killian led the process of drafting the EnergyTag Standard, which created the Granular Certificate, a robust and widely recognised instrument for hourly energy attribute tracking. The Standard is supported by hundreds of organisations including some of the world's leading sustainability players like UN Energy Google, Microsoft, Iberdrola, AES and Clean Air Task Force. Killian also Chairs the Linux Foundation's Carbon Data Specification, which aims at ensuring raw energy data is standard and available. Prior to joining EnergyTag, Killian managed global energy strategy at Air Liquide, one of the world's largest hydrogen producers. Killian holds a Masters degree in Energy Technologies from the University of Cambridge.