Vulnerability Researcher - Cheltenham, UK
Base salary up to £85,000 depending on experience
Hybrid working, average 3 days onsite per week
Active SC clearance required minimum
About the client
Our client is a highly respected UK organisation delivering advanced cyber and security research for critical national programmes. They invest heavily in innovation, technical excellence, and long-term capability building. Due to continued growth in specialist research projects, they are now looking to appoint an experienced Vulnerability Researcher.
The benefits
Compressed working week option (4 or 4.5 days)
Annual bonus scheme
Enhanced family friendly and sick pay policies
Access to flexible benefits including health and wellbeing options
Additional cash bonus opportunities
The Vulnerability Researcher role
As a Vulnerability Researcher, you will carry out deep technical research into complex software systems, identifying vulnerabilities and exploring novel attack techniques across modern platforms.
You will work closely with multidisciplinary teams to design prototypes, test hypotheses, and document findings that directly influence future cyber capabilities.
Key responsibilities include:
Reverse engineering of software binaries and applications
Conducting vulnerability research across operating systems, applications, and network services
Developing proof of concepts and exploits to demonstrate impact
Analysing system behaviour, APIs, and network protocols to uncover security weaknesses
Fuzzing and dynamic analysis of software to identify unknown vulnerabilities
Contributing to tool development to support vulnerability discovery and analysis
Producing clear technical documentation for a range of stakeholders
Vulnerability Researcher essential skills
Previous experience in software vulnerability research or exploit development
Solid programming skills with C, C++, Python, or similar
Experience with reverse engineering tools such as Ghidra, IDA Pro, or Binary Ninja
Understanding of operating system internals, particularly Linux or Windows
Experience with debugging tools and techniques
Desirable experience
Experience in exploit mitigation bypass techniques (ASLR, DEP, sandbox escape)
Familiarity with fuzzing frameworks and automated testing approaches
Exposure to network protocols and distributed systems
Scripting or automation experience for vulnerability discovery workflows
Knowledge of secure software development practices
Experience working in research led or highly technical environments
Key skills
Vulnerability Researcher, software security, reverse engineering, exploit development, Linux, Windows internals, fuzzing, C, C++, Python, cyber research, NSD
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