Remote Cybersecurity Penetration Testing Specialist – 5G Network Security & Vulnerability Research

Join arenaflex: Shape the Future of 5G Network Security

Are you energized by the challenge of breaking into fortified systems? Do you thrive when faced with complex security puzzles and cutting-edge technology? Are you passionate about staying ahead of evolving cyber threats in the rapidly expanding world of 5G telecommunications? arenaflex invites you to bring your expertise, curiosity, and tenacity to a role that sits at the absolute frontier of cybersecurity innovation.

As cyber threats grow more sophisticated by the day, the security of next-generation mobile networks has never been more critical. arenaflex is investing heavily in a state-of-the-art 5G Lab environment, and we are looking for a skilled Remote Cybersecurity Penetration Testing Specialist to help us ensure that our cloud-native 5G network remains secure, resilient, and prepared for the challenges of tomorrow. This is your opportunity to develop advanced penetration testing and vulnerability analysis capabilities while contributing to ongoing research, data science initiatives, virtual reality programs, augmented reality projects, and much more.

Our internal teams and external clients depend on the availability and integrity of our 5G Labs. Your work will directly support these operations, ensuring that the infrastructure powering modern communication remains protected against emerging threats. If you are ready to push the boundaries of what is possible in cybersecurity, this role is your next great adventure.

About the Role

As a Remote Cybersecurity Penetration Testing Specialist at arenaflex, you will perform in-depth penetration testing and vulnerability assessments of computer network intrusion vectors, with a particular focus on mobile telecommunication systems. You will generate comprehensive security reports, contribute to the design of robust security architectures, and assist in the implementation of advanced protective measures. Our team is looking for creative, resourceful minds who are eager to use new tools and develop next-generation security methodologies.

Key Responsibilities

• Conduct thorough penetration testing and vulnerability assessments of computer networks, focusing on intrusion vectors and mitigation strategies specific to mobile telecommunication systems.
• Perform security analysis of 4G, LTE, and 5G network architectures, identifying weaknesses and recommending improvements.
• Design, implement, and validate security solutions aligned with industry best practices and emerging threat landscapes.
• Generate detailed security reports for both technical and executive audiences, clearly communicating findings, risk levels, and remediation strategies.
• Operate within virtual machines and containerized environments to deploy, test, and analyze the security posture of target systems.
• Develop and refine scripts and tools using languages such as Python, Perl, Bash, or Ruby to automate testing procedures and enhance analysis capabilities.
• Collaborate with cross-functional teams on data science initiatives, virtual reality programs, augmented reality projects, and other innovative research efforts.
• Support incident response activities as needed, providing expert analysis and recommendations based on security findings.
• Stay current with the latest cybersecurity trends, threat intelligence, and emerging technologies to continuously improve defensive and offensive security strategies.
• Contribute to the development of new security methodologies and frameworks that will shape the future of 5G and beyond.

What You Bring to arenaflex

We are looking for a talented cybersecurity professional with a strong technical foundation and a passion for staying ahead of adversaries. The ideal candidate combines deep technical expertise with creativity, analytical thinking, and a drive to continuously learn.

Essential Qualifications

• Demonstrated experience with penetration testing, vulnerability analysis, security controls, and risk mitigation techniques.
• Solid understanding of specifications, protocols, deployments, and security considerations related to 4G, LTE, and 5G systems.
• Proficiency in scripting languages such as Python, Perl, Bash, or Ruby.
• Hands-on experience with virtual machines and containers, including deployment, configuration, and security analysis.
• Knowledge of security architecture and design principles, including firewalls, Intrusion Detection Systems, Virtual Private Networking, and malware protection technologies.
• Ability to obtain a security clearance.
• Bachelor's degree in Computer Science, Cybersecurity, Information Technology, or a related field, plus three years of experience in intrusion analysis.
• Alternatively, six years of experience conducting vulnerability and intrusion analysis, including two years of experience with mobile telecommunications systems, may substitute for a degree.

Preferred Qualifications

• Experience designing, deploying, operating, or troubleshooting 3G, 4G, or 5G telecommunications networks and components.
• Proficiency with command-line interfaces, SSH, simple bash scripting, and installing and debugging software services.
• Deep familiarity with 5G features, architectures, and emerging standards.
• Experience using OSINT tools and techniques such as Shodan, Censys, DNSRecon, and Google dorking.
• Experience with penetration testing tool suites including Kali Linux, Parrot OS, and BlackArch.
• Experience with cybersecurity tools such as Nmap, Nessus, Scapy, OpenVAS, Wireshark, and TCPDump, and the ability to translate findings into actionable recommendations.
• Experience performing incident response activities in a structured, methodical manner.
• Knowledge of penetration testing methodologies such as NIST SP 800-115, STRIDE, and MITRE ATT&CK.
• Understanding of telecommunication protocols, architecture, and processes, including air interface protocols.
• Active TS/SCI clearance with a polygraph is highly desirable.

Why arenaflex?

arenaflex is a global leader in technology, engineering, and management consulting, recognized for delivering transformative solutions to public and private sector clients. With a strong presence in the United Kingdom and a commitment to localized expertise backed by global resources, arenaflex offers an environment where your work has real, measurable impact.

Our UK operations reflect our broader strategy of providing tailored solutions informed by deep local market understanding and global best practices. We partner with clients across government and industry to co-create solutions that drive lasting change, modernize operations, and enhance resilience in the face of constant disruption.

At arenaflex, you will join a team of experienced professionals who are passionate about tackling complex challenges and pushing the boundaries of innovation. Whether you are advising government agencies on modernization or helping private sector companies adapt to rapidly changing technology landscapes, your contributions will make a difference.

Career Growth and Learning Opportunities

arenaflex is deeply committed to the professional development of every team member. From the moment you join, you will have access to:

• Structured mentorship programs pairing you with seasoned cybersecurity experts.
• Sponsored training and certifications, including opportunities to pursue advanced credentials in penetration testing, mobile security, and cloud-native architectures.
• Cross-functional project exposure spanning data science, virtual reality, augmented reality, and emerging 5G applications.
• Conference attendance, research publication opportunities, and participation in industry working groups.
• A clear career progression framework that recognizes both technical depth and leadership potential.

Work Environment and Culture

arenaflex fosters a collaborative, inclusive, and intellectually curious culture where diverse perspectives are valued and innovation is encouraged. As a remote role based in the United Kingdom, you will enjoy the flexibility to work from your preferred location while remaining fully integrated with our team through virtual collaboration tools, regular check-ins, and team-building activities.

We believe that great ideas can come from anywhere, and we empower our team members to take ownership of their work, experiment with new approaches, and share insights openly. Our culture is built on trust, respect, and a shared commitment to excellence.

Compensation and Benefits

arenaflex offers a competitive compensation package designed to attract and retain top talent. For this role, the hourly rate ranges from £35 to £45, depending on experience, qualifications, and demonstrated expertise. In addition to base compensation, we provide a comprehensive benefits package that typically includes:

• Generous paid time off and holiday allowance.
• Private health and dental insurance options.
• Pension and retirement planning support.
• Professional development budgets for training, certifications, and conferences.
• Flexible working arrangements, including remote work opportunities.
• Wellness programs and employee assistance resources.

Your Next Step

If you are a cybersecurity professional who is energized by the challenge of securing next-generation networks, eager to work with cutting-edge 5G technology, and ready to join a team that values innovation, collaboration, and impact, arenaflex wants to hear from you. This is more than a job — it is an opportunity to shape the future of mobile network security while building a rewarding career with a global leader in technology consulting.

Apply today and become part of a team that is redefining what is possible in cybersecurity. Together, we will protect the networks that connect our world.