Siemens appoints Holliday as CEO for UK and Ireland, succeeding Ennis
19 May 2026 
Siemens has appointed Brian Holliday as CEO for the UK and Ireland, following the retirement of Carl Ennis after more than 25 years with the company. Holliday will lead Siemens’ strategy across the region, where the company employs 12,000 people and generated £4.6bn in revenue in the 2025 financial year.
Holliday has worked for Siemens for more than 32 years in a variety of roles. He will continue as managing director of Siemens Digital Industries, and build on more than 10 years as a member of the UK and Ireland senior leadership team.
“Brian brings a deep understanding of our strategic priorities and our customers, as well as strong insight into the challenges facing industry as it digitalises,” says Matthias Rebellius, Siemens’ board member responsible for UK and Ireland. “His external experience with the Catapults and Made Smarter will also be a real asset.
“Brian will build on the strong foundations already in place, continuing to drive focus on the areas where we can make the greatest difference and create more value for customers,” he adds. “This will be even more important as we take forward our One Tech Company programme and ensure we serve our customers in a seamless, straightforward way.”
“I’m honoured to take up this position at a time of significant change, where technology and talent can make a real difference,” says Holliday. “I’ve always been proud of our people and struck by the commitment and sense of purpose evident across our UK and Ireland organisation – thus I’m genuinely excited to lead this strong team. With global leadership in industrial technology and AI, as well as the partnerships we’ve developed, Siemens is well set to help our customers with their competitiveness, resilience and sustainability.”
Holliday is a Fellow of the Royal Academy of Engineering, and visiting Professor at the University of Sheffield. He holds degrees from Cardiff University and the University of Manchester, as well as an honorary doctorate from Middlesex University. He began his career as an apprentice with Texas Instruments and remains a strong advocate for applied learning and vocational training.
He has contributed to the UK’s innovation, skills and industrial policy agendas through non-executive and committee roles, including the High Value Manufacturing Catapult, Make UK and as co-chair of the Made Smarter Commission, which works with SMEs to improve manufacturing productivity. Most recently, he was appointed to the board of Skills England, where he advocates for SMEs and social mobility.
Holliday’s predecessor, Carl Ennis, was with Siemens for more than two decades, and was CEO of the UK and Ireland for more than six years.
