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Mehdi Hajjam

Winton Centre for Risk and Evidence Communication


Mehdi Hajjam

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Mehdi Hajjam completed an MSc in Engineering at CentraleSupélec and an MSc in Renewable Energy Development at Heriot-Watt University (2007). He started his career as an Energy trader and Portfolio manager at Sorégies SAEML, a French utility supplying and distributing gas and electricity to 100k+ customers. In 2011, he joined Actility to develop then lead the Energy Business Unit of the company, providing demand response services to Transport System Operators in several European countries. This eventually led to the sale of the activity to Veolia for around £20M in 2017. At the Winton Centre, Mehdi worked as a Clojure/Clojurescript developer on different web-based applications to expose unbiased information to both patients and practitioners.

Can You Handle the Evidence?

Test your skill at navigating evidence-by-numbers with one of our quick quizzes.

Journalists & Press Officers
Do you know your absolute from your relative risks? Your ORs from your HRs? Test yourself here.
Medical Professionals
You know the difference between sensitivity and specificity, but what about lead-time and overdiagnosis bias? Examine yourself here.
Legal Professionals
Given a positive DNA match, what’s the likelihood of innocence? Check your grasp of forensic evidence & probability here.

Latest news

New NHS Decision Support Tools released!

22 November 2023

The Winton Centre have produced a suite of decision support tools for NHS England to help patients take part in share decision making.

Harding Prizes for useful and trustworthy communication in 2022 awarded!

20 April 2023

After casting the net wide across the world, the judges awarded the 2022 Harding Prize for Trustworthy Communication to an interactive calculator from the Institute of Fiscal Studies and a report from the Parliamentary Office of Science & Technology.

The search for the best evidence communication of 2022 begins!

25 November 2022

The Harding Prizes for communication in 2022 are now open for nominations at

View all news