CybExer Strengthens UK Operations with Appointment of Former British Army Cyber Leader Mansel Thewlis image

CybExer Strengthens UK Operations with Appointment of Former British Army Cyber Leader Mansel Thewlis

London, United Kingdom, 27.8.2025

Aug 2025

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1 min read

CybExer announced the appointment of Mansel Thewlis as Director of Military

Programs and National Resilience. With more than 20 years of service in the British Army,

Mansel brings extensive expertise in cyber, communications and training to support CybExer’s

growing presence in the UK.

 

Before commissioning into the Royal Signals in 2005, Mansel worked in Major Incident

Management for the UK’s national communications infrastructure with British Telecom. During

his Army career, he served in operational and strategic roles including tours to Afghanistan,

senior staff appointments in information security and cyber strategy, and leadership of training

programs for junior Officers and senior engineers. His later positions included an exchange with

the US Army’s Office of the Chief Information Officer, Operations Officer for the British Army

Cyber Information Services Operations Centre, and Chief Operating Officer for all Field Army

Cyber and Electro Magnetic Activity.

 

Mansel is already familiar with CybExer’s work and people, having seen first-hand the impact of

the company’s cyber exercise programs. Speaking about his new role, he said:

"Having already witnessed the talent of the people, their professionalism and the power of

CybExer's offering, it is exceptionally exciting as well as an honour to become part of the team. I

am looking forward to helping the company in its work bolstering Defence and national

resilience."

 

The appointment follows CybExer’s recent expansion in the UK with the opening of a new office

at the Dorset Innovation Park, a strategic move to support Defence, government and critical

industry partners in the UK.

 

Andrus Kivisaar, CEO of CybExer, commented:

"Mansel’s experience and leadership are a perfect fit for CybExer’s mission in the UK. His

background in Defence and cyber training will play an important role in strengthening our

partnerships and supporting the resilience of the UK’s Defence ecosystem. We are proud to

welcome him to the team."

 

About CybExer

CybExer is a European leader in cyber ranges and cyber training solutions, operating in more

than 60 countries worldwide. The company supports governments, Defence organisations,

financial institutions and critical infrastructure providers with flexible and highly customisable

cyber ranges that enable large-scale exercises and continuous training. CybExer’s technology is

trusted by NATO, the British Army and Fortune 500 companies.

 

For more information, visit www.cybexer.com.

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