External Infrastructure Testing
Identify and exploit weaknesses in Internet-facing systems before attackers do.
Penetration Testing & Offensive Security
Goal-driven testing that simulates real attackers, exposes weaknesses across your estate, and gives you clear, prioritised actions to reduce risk.
Testing that reflects how attackers actually work
Many penetration tests stop at checklist compliance or vulnerability scanning. Cyber Defence takes a different approach. We combine detailed reconnaissance, manual exploitation, and post-exploitation analysis with clear reporting that focuses on what an attacker could genuinely achieve against your organisation.
Our consultants follow recognised methodologies such as OSSTMM and PTES, map techniques to MITRE ATT&CK and OWASP, and tailor each engagement to your business objectives, risk profile, and regulatory obligations.
From point-in-time tests to continuous offensive assurance
Penetration testing is not simply about producing a list of vulnerabilities. It is about answering precise questions: how far could an attacker go, what data or systems are at risk, and which weaknesses must be addressed first.
Cyber Defence delivers one-off tests, recurring programmes, and scenario-based offensive engagements. We work with your internal teams to ensure that every test results in clear, actionable remediation work and measurable improvements to your security posture.
Engagement types
Coverage across your critical attack surfaces
Explore each testing service in more detail:
Internal Network & Active Directory
Understand how an attacker could move through your internal network and compromise AD.
Web Application Testing
Assess business-critical web applications against OWASP and real-world abuse scenarios.
API Security Testing
Test REST, SOAP, and GraphQL APIs for authentication, authorisation, and input handling flaws.
Mobile Application Testing
Evaluate iOS and Android applications for client-side and server-side weaknesses.
Cloud & Microsoft 365 Testing
Assess Azure, AWS, and M365 configurations, identities, and access paths.
Wireless & Remote Access Testing
Identify weaknesses in Wi-Fi, VPN, and remote access that attackers can exploit.
Red Team & Scenario-Based Engagements
Simulate realistic multi-stage attacks against your organisation’s people, processes, and technology.
Deliverables
What you receive from every engagement
Testing is only as valuable as the clarity and change it creates. Every engagement includes:
Executive summary
A concise narrative describing overall security posture, key risks, and business impact in clear, accessible language.
Detailed technical report
Issue descriptions, affected assets, reproduction steps, screenshots, and references mapped to relevant standards.
Risk-based remediation plan
Prioritised remediation guidance indicating which issues to address first, and recommended control improvements.
Attack path mapping
Where appropriate, diagrams and descriptions showing how issues can be chained into realistic attack scenarios.
Debrief sessions
Optional workshops with engineers and leadership to walk through findings and remediation strategies.
Integration with SOC365 & Threat Intelligence
Findings can be fed into SOC365 detections and Threat Intelligence watchlists to prevent recurrence.
Plan your next penetration test
Share your current environment, regulatory context, and testing history. We will help you define a practical scope and cadence that delivers meaningful assurance without unnecessary disruption.
Experience across regulated and high-stakes sectors
Our consultants have tested environments ranging from financial trading platforms and healthcare systems to maritime control environments and legal practices. We understand the operational and regulatory pressures that shape your risk appetite.
Financial services
Healthcare and life sciences
Maritime and logistics
Legal and professional services
Technology and SaaS
Government and public sector
Critical infrastructure and OT
Offensive testing backed by real defensive experience
Our penetration testing and offensive security team works hand in hand with Cyber Defence’s SOC365 and Threat Intelligence operations. This means our testers understand how real attackers behave and how defenders actually respond.
If you need to demonstrate assurance to regulators, customers, or your board, or you simply need a clearer view of how an attacker would approach your environment, we will design a testing programme that delivers defensible, repeatable evidence of your security posture.