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iO Associates • Bristol, England, United Kingdom
Role & seniority: Penetration Tester; mid-level (2–5 years of experience)
Stack/tools: CREST/Check-level readiness; Metasploit, Burp Suite, Nmap; strong TCP/IP networking, OS, and security tech knowledge; scripting/coding (Python, Bash, C#)
Conduct penetration tests, vulnerability assessments, and red team exercises
Identify security weaknesses, provide remediation guidance, and support project delivery
Produce detailed reports and maintain client relationships; stay current with threats and best practices
Master’s degree or PhD in computer science, cybersecurity, information security, or related field
CREST Registered Tester or equivalent certification (CHECK Team Member)
2–5 years in penetration testing/vulnerability assessments
Proficiency with Metasploit, Burp Suite, Nmap; strong networking and OS security knowledge
Scripting/coding experience (Python, Bash, C#, etc.)
Additional cybersecurity certifications
Experience across networks, infrastructure, and applications; threat intelligence awareness
Location & work type: Bristol, UK; Permanent role; UK right to work required; visa sponsorship not available
Penetration Tester Bristol, UK Permanent We are seeking a Penetration Tester to join a leading technology company based in Bristol, UK. The company specialises in cybersecurity consultancy, software development, and bespoke research & development, operating across industries such as telecommunications, finance, defence, rail, and aerospace. Our team plays a key role in safeguarding critical infrastructure and supporting global organisations. As a Penetration Tester, you will assess and strengthen clients' security by conducting penetration tests, vulnerability assessments, and red team exercises. You will identify security weaknesses, provide clear remediation advice, support project delivery, and maintain strong client relationships. You will test networks, infrastructure, and applications, simulate real-world attacks, develop exploit techniques, produce detailed reports, and stay up to date with emerging cyber security threats and best practices.
P. S.: Visa sponsorship is not available - only candidates currently residing in the UK with the existing right to work will be considered.