Managing Director, Interim ESSHQ Director (From 1 January 2025), and Managing Director

John Grierson

Biography

John Grierson began his nuclear industry career as an apprentice electrician for British Nuclear Group at Chapelcross, where he would later become site director.

Through his career, which has spanned almost four decades to date, John has held a variety of roles. John’s previous roles have included operations manager and head of defuelling projects at Sellafield, deputy site director at Bradwell, and programme director – intermediate level waste.

He was site director at Hunterston and Chapelcross – joining Dounreay as acting managing director means he has now led all of NRS’s Scottish sites.

John became nuclear operations director for NRS Sites (then Magnox) in 2020 and during this time he led the company response to the COVID 19 pandemic and the restart of sites following the temporary pause.

John is an advocate for wellbeing across the business and is the executive sponsor for mental health and for the men’s health network at NRS Sites.

Managing Director

Magnox Ltd

Interim ESSHQ Director (From 1 January 2025)

Nuclear Restoration Services

Managing Director

Dounreay