Senior Cyber Researcher
Date Posted:
2026-08-25

Country:
United Kingdom

Location:
Gloucester, South Gloucestershire

Position Role Type:
HybridSenior Cyber Researcher
Gloucester
Permanent, full time
Onsite
Due to the interesting work we do and the sector this team is working in, we require all candidates to be willing and eligible to hold SC and eDV clearance.
About us
At Raytheon UK, we take immense pride in being a leader in defence and aerospace technology. As an employer, we are dedicated to fuelling innovation, nurturing talent, and fostering a culture of excellence.
As a leading defence and aerospace company operating across the United Kingdom, Raytheon UK helps to solve our customers’ toughest challenges. We are a major supplier to the UK government and customers around the globe, providing defence solutions across all domains: land, sea, air, space, and cyberspace. We also provide digital and training transformation solutions to commercial and military customers.
With circa 2000 employees and major facilities operating throughout the UK including Broughton (Wales), Livingston and Glenrothes (Scotland), and Harlow, Gloucester, and Manchester (England); we are committed to investing in British careers and technology development.
Cyber
Our National Security Cyber business delivers mission-critical solutions that safeguard our national security 24 hours a day, seven days a week. Working in a mature, agile environment, our SCRUM teams work synchronously with our customers to solve some of the toughest digital challenges faced in the world today.
About the role
Raytheon UK’s Cyber Research Group (CRG) is looking for a Senior Cyber Researcher to conduct cutting-edge research and development across multiple cyber domains. You’ll drive technical investigations, design rapid prototypes, and uncover emerging threats and vulnerabilities.
Key Responsibilities
- Conduct deep-dive research in vulnerability discovery, reverse engineering, and embedded systems
- Design and build rapid prototypes to validate novel cyber capabilities and concepts
- Analyse network protocols and system behaviours to identify security weaknesses
- Collaborate with multidisciplinary teams to deliver research outcomes and technical solutions
- Document methodologies, findings, and recommendations for internal and external stakeholders
- Support business development efforts, including proposal writing and technical briefings
Essential Skills and Experience
- Proficiency in programming languages such as C, C++, or Python
- Strong working knowledge of Linux-based systems, including command-line tools and system configuration
- Excellent communication skills, both written and verbal
- Solid understanding of networking concepts and protocols (e.g. TCP/IP, UDP, DNS, HTTP, ICMP)
- Demonstrated analytical and problem-solving capabilities, with a methodical and inquisitive approach to technical problems
- Experience in rapid prototyping using technologies such as Raspberry Pi, Arduino, and virtualised environments
Desirable Experience (not essential)
- Hardware prototyping, PCB design and microcontroller programming.
- Experience using penetration testing or red team tools.
- Reverse engineering using Ghidra, IDA Pro, or Binary Ninja.
- Vulnerability research, including exploit development and mitigation bypass techniques.
- Embedded software development on ARM, AVR, PowerPC or MIPS platforms.
- Experience with Radio Frequency (RF) systems, Software Defined Radios (SDRs), 2G/4G/5G, including tools like GNU Radio, Osmocom, srsRAN or USRP.
- Network engineering experience in home lab or professional environments.
Benefits:
£: Competitive salary
Contributory Pension Scheme (up to 10.5% company contribution)
6 times salary ‘Life Assurance’ with pension
25 days holiday (increasing with service) + statutory public holidays, plus opportunity to buy and sell up to 5 days (37hr)
Company bonus scheme (discretionary)
Flexible Benefits scheme with extensive salary sacrifice schemes, including Health Cashplan, Dental, and Cycle to Work amongst others
Enhanced sick pay
Enhanced family friendly policies including enhanced maternity, paternity & shared parental leave
Work Culture
37hr working week, although hours may vary depending on role, job requirement or site-specific arrangements.
Early 1.30pm finish Friday, start your weekend early!
Remote, hybrid and site based working opportunities, dependant on your needs and the requirements of the role.
Up to 5 paid days volunteering each year.
Flexible working culture focused on output, with more formal flexible working arrangements on request (assessed subject to role) - please highlight any requests to the Talent Acquisition team.
RTX adheres to the principles of equal employment. All qualified applications will be given careful consideration without regard to ethnicity, color, religion, gender, sexual orientation or identity, national origin, age, disability, protected veteran status or any other characteristic protected by law.
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RTX adheres to the principles of equal employment. All qualified applications will be given careful consideration without regard to ethnicity, color, religion, gender, sexual orientation or identity, national origin, age, disability, protected veteran status or any other characteristic protected by law.
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