Identify and exploit real-world vulnerabilities before attackers do with offensive security services delivered by accredited Penetration Testers and a dedicated Red Team.
Our premium suite of offensive security services are structured across four core areas, combining targeted testing, adversary simulation, and continuous assurance to proactively identify and manage evolving risk.
Penetration Testing
Identify and validate exploitable vulnerabilities across your applications, infrastructure and users through controlled, scenario-based testing.
✓Application, cloud, product and infrastructure testing
Maintain control of your external exposure through monitoring, vulnerability management and remediation support, ensuring risks are identified, prioritised and addressed over time.
Targeted testing across your entire attack surface
CHECK and CREST-accredited penetration testing across applications, infrastructure, cloud, and emerging technology. Every engagement is scoped to your specific environment and risk exposure, with clear reporting focused on validated exploitability and prioritised remediation.
Ongoing
Penetration Testing as a Service (PTaaS)
An ongoing penetration testing subscription that provides year round visibility and remediation workflow support. Delivery is platform led with real time dashboards and optional Jira integration to support remediation tracking within existing workflows.
Internal and external network penetration testing designed to show likely entry points, lateral movement opportunities, and impact on critical systems. Coverage includes Active Directory attack paths, segmentation effectiveness and remote access exposure.
Manual testing of web applications, APIs and mobile platforms, focused on authentication, authorisation, access control, input handling and business logic. Scoping and test depth are set against how the application is built and how data is handled, with findings documented for practical remediation.
Security testing of cloud environments across AWS, Azure and GCP, identifying misconfiguration risk, excessive permissions and privilege escalation paths. Work focuses on how attackers move through cloud services in practice, including lateral movement across cloud control planes and workloads.
Adversarial testing of AI systems and large language model (LLM) deployments, aligned to the OWASP LLM Top 10. Focus areas include prompt injection, data leakage pathways, model manipulation, and guardrail bypass, with reporting written to support practical remediation by engineering teams.
Security assessment of connected products, embedded systems and proprietary software, designed to identify how devices can be accessed, manipulated or disrupted. Coverage can include firmware analysis, hardware interfaces, communication protocols including RF, and supply chain components where they form part of the product ecosystem.
Meet specific regulatory and assurance requirements with testing aligned to recognised frameworks and government‑approved methodologies, including CHECK and sector-led assurance schemes. Regulatory testing provides structured validation of controls and configurations, ensuring outcomes can be evidenced, reported and relied upon in audit and compliance contexts.
Adversary simulation to test your defences under realistic conditions
Move beyond point-in-time testing with sustained, threat-led simulations that evaluate detection, response and resilience under realistic attack scenarios. Delivery is tailored to your environment and threat model, with technical and executive debriefs that support clear remediation decisions and measurable improvement.
Full-scope
Red Teaming
A sustained, real-world adversary simulation designed to test whether an attacker can reach agreed objectives and assess how effectively your organisation detects, contains and responds along the way. Plans are tailored to your risk profile and threat model, with reporting and workshops designed to support remediation and uplift.
A collaborative exercise that brings offensive and defensive teams together to test specific attack techniques openly, then tune detection and response in real time. The engagement follows an iterative cycle of execution, detection, tuning and retesting, producing measurable uplift rather than a standalone findings report.
A controlled ransomware simulation that safely replicates modern ransomware behaviours, from initial compromise and lateral movement through to ransomware tradecraft. Delivered with technical and executive debriefs, this service provides actionable recommendations to strengthen detection, response and recovery readiness.
Social engineering engagements designed to test the human pathways attackers rely on for initial access. These exercises can include phishing and telephone approaches, alongside physical vectors where agreed, helping organisations validate whether controls and behaviours hold under realistic pressure.
Realistic phishing simulations engineered to test susceptibility and strengthen reporting behaviours. Campaigns can be targeted to roles and risk exposure, with results used to identify where user behaviour creates avoidable pathways to initial access.
Assess whether detection and response capabilities operate as expected under realistic attack conditions. SOC validation tests how effectively threats are identified, escalated and handled, providing a clear view of detection coverage, response quality and operational readiness.
Continuous visibility and ongoing validation of your exposure
Most organisations do not have a complete view of their external attack surface. Assets accumulate over time through cloud adoption, legacy infrastructure, shadow IT and credential exposure, creating entry points that are often unknown or out of date by the time they are identified.
Continuous assurance replaces point-in-time assessment with ongoing visibility and validation, ensuring exposure is identified as it changes and risks can be prioritised and addressed before they are exploited.
Validation
Continuous Testing
An ongoing penetration testing approach that integrates automated discovery with scheduled manual testing to ensure new systems, changes and deployments are assessed as they are introduced. Designed for organisations with dynamic environments where point-in-time testing cannot provide sufficient assurance.
A rolling adversary simulation programme that applies repeated attack scenarios over time to test detection and response as your environment evolves. Unlike discrete engagements, this approach allows organisations to validate improvements, identify regression in controls, and maintain confidence that defensive capabilities remain effective under changing conditions.
Continuous discovery and monitoring of your internet facing assets, providing a live view of domains, services, cloud resources and exposed data that form your external attack surface. Combines automated scanning with analyst validation and risk based prioritisation, enabling organisations to understand their exposure and act on verified findings rather than raw noise.
Ongoing exposure management with remediation support
Security exposure does not remain static. New vulnerabilities, configuration changes and external risks emerge continuously, while existing issues often persist without clear ownership. With our managed offensive security services, your organisation can maintain visibility of current exposure, track vulnerabilities as they emerge, and ensure remediation activity is prioritised and followed through so risk reduces over time.
Visibility
Vulnerability Management as a Service (VMaaS)
An always on vulnerability management service that identifies, assesses and helps address vulnerabilities across on premises, cloud and hybrid environments. This ensures continuous visibility and reporting to support remediation progress, and expert guidance to prioritise action in line with operational risk and compliance needs.
Practical support to move from findings to risk reduction, focusing on closing vulnerabilities and configuration weaknesses that persist over time. This can include guidance on remediation priorities and optional engineering support to implement key improvements where internal capacity is constrained.
Continuous scanning of web applications and APIs to identify vulnerabilities and exposure changes between manual tests. This service provides early visibility of emerging issues so remediation can begin before vulnerabilities become embedded in production environments.
Independent technical auditing and testing to validate compliance with the UK Cyber Essentials controls. The assessment confirms system hardening, patching, malware protections, configuration security and user access controls, with a formal audit delivered by a certified assessor.
Ongoing monitoring of configuration alignment against agreed security baselines, including CIS where applicable, to identify drift and control weakness as environments change. Reporting highlights where configurations fall short of expected standards and what requires action to restore alignment.
Your organisation’s trusted partner in layered cyber resilience
With proven experience across critical sectors and a complete suite of accredited cyber services, CSA Cyber offers a single, trusted partner for protection, validation and continuous improvement.
One partner, multi-layered cyber resilience
A premium suite of accredited services shaped by deep heritage in securing critical sectors and high-profile clients.
Leading the UK for cyber excellence
Our UK-based, security-cleared teams are trusted by clients and validated by recognised industry bodies across the globe.
Engineered for high-security delivery
Our practice is deliberately scaled to combine major-provider capability with specialist-level precision and trust.
Complete cyber assurance starts here
Talk to a specialist about validating your defences and reducing real‑world exposure through our CHECK and CREST‑accredited offensive security services.
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