How Siemens’ UK CEO Departure Reflects a Strategic Shift

Siemens UK CEO Carl Ennis has announced his plans to retire, marking the end of a two-decade long career of leadership within the technology industry.

During his time at Siemens UK, Carl has worked both in the UK and internationally, playing a key role in the continuous success and growth of the businesses.

He has led the UK and Ireland branch as well as serving as Country CEO for more than six years, working closely with customers, colleagues and company partners across the region and globally.

Discussing Carl’s decision to leave in a company statement, Matthias Rebellius, Managing Board Member of Siemens AG and CEO of Smart Infrastructure, says: “On behalf of Siemens, I want to thank Carl Ennis for more than two decades of service. 

“Carl’s dedication to our customers paved the way to lasting relationships founded on trust, innovation, and partnership.”

Carl will officially leave the position on 30 April 2026 and a formal search is currently underway for his successor.

Innovation under Carl’s leadership

Carl’s tenure at Siemens UK began in 2004 where he first served as the company’s Director of Transmission and Distribution Service.

Over the following years, Carl served as leader for various company divisions, regionally and abroad, such as his time as President of Siemens Energy Service for the AsiaPacific branch, where he was responsible for all countries working with Siemens within the region.

In 2019, he became Country CEO for the UK and Ireland, leading the division’s operations for six years.

Here, Carl focused on providing innovative technology solutions across multiple UK and Ireland sectors, including Healthcare, Mobility, Energy and Industry.
Working closely with the Siemens plc Board and company executives, he focused on value creation for Siemens’ shareholders and established a positive working environment for employees across the region.

Carl has overseen several technology developments in the UK and Ireland and across the industry, most notably the company’s venture into AI solutions for industrial applications, such as Siemens’ Senseye Predictive Maintenance programme — an AI tool designed to analyse risk during manufacturing operations.  

Under Carl’s leadership, the regional branch of Siemens saw an annual turnover in excess of £4bn (US$5.3bn).

“It has been a privilege to be part of Siemens for so long, and to work alongside so many talented people,” Carl says, discussing his time at the company. 

“I’m grateful for the support, trust and friendship I have received, and I’m incredibly proud to have contributed to the ongoing success of the business.”

Industry-wide changes

Siemens has also initiated a leadership transition at its regional branch in the US, with Ann Fairchild named as President and CEO of Siemens USA.

Ann has served as the company’s interim president since October 2025 and will assume the CEO role effective immediately.

After more than 25 years at Siemens across several leadership roles, such Executive Vice President & General Council, Ann will lead the company’s US branch, the company’s largest market globally.

Discussing her appointment, Roland Busch, President and CEO of Siemens AG, says: “Ann Fairchild brings exactly the right leadership for this moment. 

“Ann’s strong, steady and collaborative leadership will enable Siemens to deliver greater value for our customers. I look forward to working with Ann to advance our ONE Tech Company program in the US, our largest market.”

These two recent changes in leadership reflect a wider shift, both within the Siemen’s brand and across the technology landscape.

With new developments like AI continuing to drive technology innovations globally, brands like Siemens are regularly facing pressures to change strategies in product development, data management and direction of leadership.

Companies across all global sectors like Adobe, Target and Coca-Cola have already seen multiple executive departures in the past year, with many outgoing CEOs citing the need for new leadership as AI integration grows.

In a company statement discussing leadership strategies, Roland said: “Siemens has achieved remarkable success as a leading technology company. Our innovations are enabling customers to master their digital and sustainability transformations and we are expanding our partnerships to create even more value for customers.”

Mirroring this sentiment, in a LinkedIn post, he added: “These strategic appointments and transitions reinforce our leadership team as we accelerate our journey towards becoming ONE tech company. It's an exciting time for #TeamSiemens!”