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Posted May 13, 2026

**Experienced Full Stack Cybersecurity Professional – Penetration Testing & Vulnerability Analysis for 5G Network Security**

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At arenaflex, we are a global consulting firm renowned for our expertise in technology, engineering, and management services. Our UK operations are part of our broader strategy to provide localized expertise while leveraging global knowledge and resources. We are seeking an experienced full stack cybersecurity professional to join our team in the UK, working on cutting-edge cloud-native 5G network security projects. **The Opportunity:** Are you passionate about cybersecurity and eager to contribute to the development of the next generation of security methodologies? Do you enjoy the thrill of the hunt and the head-to-head challenge of gaining access to well-protected networks? If so, we invite you to join our team at arenaflex, where you will have the opportunity to work on exciting projects, develop your skills, and make a real impact in the field of cybersecurity. **Job Summary:** We are seeking an experienced full stack cybersecurity professional to join our team in the UK. As a penetration tester and vulnerability analyst, you will be responsible for performing penetration testing and vulnerability assessments of computer network intrusion vectors and mitigations related to mobile telecommunication systems. You will also generate security reports and assist in the implementation and design of security solutions. Our team is looking for creative minds who are ready to use new tools and approaches to develop the next generation of security methodologies. **Key Responsibilities:** * Perform penetration testing and vulnerability assessments of computer network intrusion vectors and mitigations related to mobile telecommunication systems * Generate security reports and assist in the implementation and design of security solutions * Develop and maintain knowledge of security architecture and design, including firewalls, Intrusion Detection Systems, Virtual Private Networking, and virus and malware protection technologies * Collaborate with cross-functional teams to identify and prioritize security risks and develop mitigation strategies * Stay up-to-date with emerging threats and technologies, and recommend new tools and approaches to the team * Participate in the development and implementation of security policies and procedures * Conduct security assessments and provide recommendations for improvement **Essential Qualifications:** * Bachelor's degree in Computer Science, Cybersecurity, or Information Technology * 3 years of experience in intrusion analysis or 6 years of experience conducting vulnerability and intrusion analysis * 2 years of experience with mobile telecommunications systems * Experience with penetration testing, vulnerability analysis, security controls, and risk mitigation * Experience with specifications, protocols, deployments, security, or vulnerability assessments of 4G, LTE, and 5G systems * Experience with scripting languages such as Python, Pearl, Bash, or Ruby * Experience with virtual machines and containers to perform tasks including deployment or performing security analysis of said systems * Ability to obtain a security clearance **Nice to Have:** * Experience with designing, deploying, operating, or troubleshooting 3G, 4G, 5G telecommunications networks and components * Experience with command line, SSH, simple bash scripting, and installing and debugging software services * Experience with 5G features and architectures * Experience using OSINT tools and techniques such as Shodan, Censys, DNSRecon, and Google docking * Experience using penetration testing tool suites such as Kali Linux, Parrot OS, and Black Arch * Experience with cyber security tools including Nmap, Nessus, Scapy, OpenVAS, Wireshark and TCPDump, and making recommendations based on findings of those cyber security tools * Experience performing incident response activities * Knowledge of penetration testing methodologies including NIST SP 800-115, STRIDE, and MITRE ATT&CK * Knowledge of telecommunication protocols, architecture, and processes, including air interface protocols * TS/SCI clearance with a polygraph **About arenaflex:** arenaflex is a global consulting firm, widely recognized for its expertise in technology, engineering, and management services. Our UK operations are part of our broader strategy to provide localized expertise while leveraging global knowledge and resources. We offer a wide range of services tailored to both public and private sector clients, including cybersecurity, data analytics, digital solutions, and strategic consulting. **Work Environment and Company Culture:** We are a collaborative and innovative team that values diversity, equity, and inclusion. We offer a dynamic and supportive work environment that encourages creativity, growth, and development. Our team consists of experienced professionals who work closely with clients to address complex challenges and drive transformative change. **Compensation and Benefits:** We offer a competitive salary range of £35-£45 per hour, depending on experience. We also offer a range of benefits, including: * Comprehensive health insurance * Retirement savings plan * Paid time off and holidays * Professional development opportunities * Flexible work arrangements **How to Apply:** If you are a motivated and experienced cybersecurity professional looking for a new challenge, we invite you to apply for this exciting opportunity. Please submit your resume and a cover letter explaining why you are the ideal candidate for this role. We look forward to hearing from you!

Join Our Team at arenaflex

At arenaflex, we are committed to innovation and excellence. We believe in the importance of collaboration, diversity, and inclusion. If you share our values and are passionate about cybersecurity, we invite you to join our team. Apply now to become a part of our dynamic and supportive work environment.

Why arenaflex?

* Global reach and expertise * Collaborative and innovative team culture * Comprehensive benefits package * Opportunities for professional development and growth * Dynamic and supportive work environment

What We Offer:

* Competitive salary range of £35-£45 per hour * Comprehensive health insurance * Retirement savings plan * Paid time off and holidays * Professional development opportunities * Flexible work arrangements

How to Apply:

* Submit your resume and a cover letter explaining why you are the ideal candidate for this role * Apply now to become a part of our dynamic and supportive work environment

Apply Now!

Don't miss this opportunity to join our team at arenaflex. Apply now to become a part of our collaborative and innovative team culture. We look forward to hearing from you! Apply for this job