Computer Network Defence Ltd (CND)

About the Company

Computer Network Defence Ltd are a UK based cyber security consultancy with an extremely broad spectrum of capability. Our highly experienced cyber security staff are supported by our in-house cyber security recruitment division, ensuring availability and specialist skills through an extensive associate pool. We pride ourselves on being deeply technical and providing innovative solutions to our clients with great agility. Consultancy We specialise in delivering cyber security solutions into secure environments in both the Public and Private Sector. Our background is building, manning and operating Security Operations Centres. From this strong foundation we expanded our range of information security functions to include a broad spectrum from penetration testing through to defence in depth security architecture. Recruitment Our ethical, personable and dedicated approach to business has resulted in a reputation for excellence. This combined with our inhouse technical, consultancy and recruitment expertise ensures an unrivalled understanding of candidate and client requirements. Armed with our strong belief in 'quality over quantity' our candidates and clients are all screened, tested and referenced to ensure an unrivalled ratio of 'candidate submissions to offers'. The Radar The Radar Page was designed and built by CND to meet the demands of Government and Military networks back in the early 2000s. It provides near real time information on new and emerging cyber threats. It's public availability and lack of corporate identity has resulted in almost every industry, taking advantage of it either on an occasional basis or full time. The page auto updates every 20 minutes drawing information from multiple sources.

Listed Jobs

Company Name

Computer Network Defence Ltd (CND)

Job Title

Penetration Tester (CHECK)

Job Description

Job title: Penetration Tester (CHECK) Role Summary: Conduct penetration tests at CHECK level across infrastructure, application, mobile, Active Directory, and cloud environments, delivering technical input to sales and producing detailed, actionable reports for clients. Expactations: Possess a CHECK equivalent certification and current SC/DV clearance (or eligibility). Experienced with Linux and Windows platforms, capable of using established PT tools, scripting in Bash or Python, and familiar with cloud services (Azure/AWS). Key Responsibilities: - Execute penetration testing engagements aligned with CHECK standards. - Perform supplementary non-CHECK testing when required. - Collaborate with sales to define technical scopes and requirements. - Produce comprehensive, client‑ready reports highlighting findings and remediation guidance. - Keep abreast of emerging attack vectors, industry trends, and latest testing methodologies. - Apply a broad testing approach covering infrastructure, application, mobile, AD, and cloud targets. Required Skills: - CHECK-equivalent security certification. - Valid SC/DV clearance or eligibility to obtain. - Proficiency in Linux and Windows OS environments. - Strong command of mainstream penetration testing tools (e.g., Metasploit, Nmap, Burp Suite). - Scripting or programming in Bash, Python, or equivalent. - Knowledge of cloud platforms (Azure, AWS) and associated security controls. - Understanding of cybersecurity standards (ISO27001, PCI‑DSS, CIS). Required Education & Certifications: - CHECK certification or equivalent (e.g., Check Point Certified Professional). - Security certifications such as OSCP, CEH, or equivalent are desirable. - Current SC/DV security clearance (or eligibility).

Cheltenham, United kingdom

Hybrid

03-12-2025

Company Name

Computer Network Defence Ltd (CND)

Job Title

Software Developer

Job Description

**Job title**: Software Developer **Role Summary**: Support a highly collaborative, agile development team by writing, reviewing, and maintaining code in a pair‑programming environment. Design and implement solutions that enhance product quality and user experience while actively participating in sprint planning and continuous improvement activities. **Expectations**: - Deliver high‑quality software in a fast‑moving, Scrum‑based workflow. - Actively engage in peer reviews, architectural discussions and knowledge sharing. - Communicate clearly with product owners, account managers, and operations teams. - Pursue professional growth and embrace new learning opportunities. **Key Responsibilities**: 1. Participate in pair programming, whiteboarding, and joint architecture design activities. 2. Write clean, maintainable code and ensure every change is peer‑reviewed. 3. Collaborate with cross‑functional teams to deliver customer‑focused features and maintain system stability. 4. Engage in sprint planning, backlog refinement, and sprint reviews to drive value. 5. Contribute to continuous learning initiatives, workshops, and code standards. **Required Skills**: - Commercial experience with modern programming languages such as PHP, JavaScript, or React. - Strong understanding of MVC or modern JavaScript frameworks. - Proficiency with Git and collaborative coding practices. - Excellent verbal and written communication skills. - Self‑motivated, eager to learn, and adaptable to changing priorities. **Bonus Skills**: - Knowledge of accessibility standards (WCAG, ARIA). - Experience with automated testing frameworks (Jest, PHPUnit, etc.). - Familiarity with software design best practices and patterns. **Required Education & Certifications**: - Bachelor’s degree in Computer Science, Software Engineering, or a related field, or equivalent professional experience.

Somerset, United kingdom

Hybrid

18-12-2025

Company Name

Computer Network Defence Ltd (CND)

Job Title

Security Operations Centre Analyst (Contract)

Job Description

Job title: Security Operations Centre Analyst (Contract) Role Summary: Contract‑based SOC analyst responsible for security monitoring, investigation, and response across a large organisation. Works day/night shifts, collaborates with stakeholders of varying technical knowledge, and drives continuous improvement of the monitoring platform. Experiences: Minimum 3–5 years’ experience as a SOC analyst or equivalent role with hands‑on SIEM operation and incident response. Proven track record of delivering actionable alerts, developing playbooks, and leading junior analysts. Key Responsibilities: - Analyse SIEM outputs (ArcSight, Splunk, LogRhythm, AlienVault); triage, investigate, and respond to security events. - Enhance monitoring capability by recommending and implementing tooling and process improvements. - Interface with technical and non‑technical stakeholders to explain findings and provide guidance. - Maintain situational awareness of client security posture, suggest mitigations, and support change management. - Escalate complex incidents, oversee escalation chains, and act as point of contact for junior staff. Required Skills: - Proficient with SIEM platforms (ArcSight, Splunk, LogRhythm, AlienVault). - Strong understanding of security monitoring concepts, threat intelligence, and incident management. - Ability to develop and refine SOC playbooks, processes, and SOPs. - Excellent communication and stakeholder management skills. - Self‑motivated, adaptable, and able to work independently across time zones. Required Education & Certifications: - Valid UK Security Clearance: SC (current and active). - Educational background in Cybersecurity, Computer Science, or related field preferred. - Relevant certifications (e.g., CompTIA Security+, GIAC GCT, or equivalent) are advantageous.

Andover, United kingdom

On site

05-02-2026

Company Name

Computer Network Defence Ltd (CND)

Job Title

Software Engineer

Job Description

Job Title: Software Engineer Role Summary: Deliver mission‑critical defence software, focusing on Intelligence and Cyber Security. Design, develop and maintain secure systems using DevSecOps practices in a Linux environment, while collaborating with cross‑functional teams. Expectations: Hold DV security clearance. Demonstrate experience in defence or security‑sensitive projects. Apply secure coding standards and participate in continuous integration/deployment workflows. Key Responsibilities: - Design, code, test and deploy software components in Java (or equivalent). - Build and maintain data pipelines with Apache NiFi. - Integrate with Elasticsearch/Kibana for data interrogation. - Develop and maintain front‑end features using JavaScript/TypeScript/React where required. - Ensure code quality through peer review and automated CI/CD with GitLab. - Collaborate with stakeholders to translate mission requirements into technical solutions. - Monitor performance and apply optimisations across Linux‑based infrastructures. Required Skills: - Proficiency in Java (primary) or Python. - Strong Linux/Unix development experience. - Version control with Git; CI/CD via GitLab. - Experience with Apache NiFi. - Familiarity with React/TypeScript/JavaScript for front‑end tasks. - Working knowledge of Elasticsearch and Kibana. - Awareness of DevSecOps principles and secure coding practices. - Exposure to Atlassian tooling (Jira, Confluence). Required Education & Certifications: - Bachelor’s degree or equivalent in Computer Science, Software Engineering or a related field. - DV Security Clearance (or ability to obtain).

Gloucester, United kingdom

On site

18-02-2026