John Womersley

john womersley ess director general

Professor John Womersley began work as Director General of the European Spallation Source ERIC on November 1, 2016.

He previously held the position of Chief Executive of the Science and Technology Facilities Council (STFC), the United Kingdom's funding agency for large-scale science facilities and national laboratories, particle physics, nuclear physics and astronomy. He led the UK’s membership of the European XFEL, ESS, and the SKA telescope project, and established the Hartree Centre as a £300m joint project with IBM.


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A graduate of Cambridge and Oxford (D. Phil. Experimental Physics), Prof. Womersley has played a leading role in particle physics both in Europe and the United States. John worked at Fermilab before becoming a scientific advisor to the Department of Energy in the US. He returned to the UK in 2005 to become Director of the Particle Physics Department at the STFC Rutherford Appleton Laboratory at a time when it was building and delivering vital components to CERN's Large Hadron Collider. In time John took on a broader role as Director of the Science Programmes Office and was then appointed Chief Executive in 2011.

He has served on the councils of CERN and ESO, the Fermilab (FRA) Board and the board of AURA. John has chaired the European Strategy Forum on Research Infrastructures (ESFRI) and the European Commission's Expert Group on Cost Control and Management in Large Research Infrastructures. John has also served on numerous review panels and boards as an expert including the Helmholtz Association and the Human Brain Project.

Project Moves Forward as New ESS Director General Takes Over

John Womersley begins work as Director General of the European Spallation Source ERIC today.

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ESS Appoints Next Director General

A prominent figure in European research facilities, John Womersley will take over the high-profile project at an important time.

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