CyberLab are Trusted by 1,500+ Organisations

Why Choose CyberLab for Penetration Testing?

Unmatched Expertise

14-strong UK team, including 7 CHECK Team Leaders, 6 CTMs, and SC/NPPV3-cleared consultants.

ProvenTrack Record

Over a decade of high-stakes testing for public sector and regulated industries, building on our ex-Armadillo Sec heritage.

Trusted by 1,200+ Organisations

Including NHS, local authorities, housing,
manufacturing, education, and financial services.

RapidResponse

Next-day testing for compliance deadlines, audits, and urgent stakeholder needs.

No Jargon.No Orphaned Reports

Just clear, evidence-based security improvement.

Our Accreditations

Our Approach: Penetration Testing That Drives Action

Penetration Testing is a controlled, simulated cyber attack conducted by security professionals to identify and validate vulnerabilities across an organisation’s systems, applications, and infrastructure. The objective is to uncover weaknesses before adversaries can exploit them, providing actionable insight to improve resilience.

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Detect

We identify your risks before attackers do. From CREST- and Check- accredited penetration testing to continuous vulnerability scans, we identify the gaps others miss.

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Detect
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Comply

Achieve and maintain compliance with standards like Cyber Essentials, Cyber Essentials Plus, ISO 27001, PCI DSS, GDPR, and sector-specific regulations, reducing legal, reputational, and operational risk.

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Comply

Our Most Popular Penetration Testing Services

MOST POPULAR

Next-Day Pen Test(24–48 hours):

For tight deadlines, due diligence, CE+,
ISO audits, and urgent risks.

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External InfrastructurePen Test:

Uncover exploitable internet-facing
weaknesses.

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Internal InfrastructurePen Test:

See what a malicious insider or
compromised device could access.

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Web ApplicationPen Test:

OWASP-led exploitation for portals, customer apps, and internal systems.

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Cloud & Microsoft 365Pen Test:

Uncover exploitable internet-facing weaknesses.

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Operational Technology (OT)Penetration Testing:

Assessment of Operational Technology in manufacturing and CNI environments.

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Social Engineering& Phishing:

Assess human-layer vulnerabilities with ethical simulations.

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API Penetration Testing:

Modern threat-led assessment of API authentication, authorisation, and data flows.

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Red Team and Simulated Attack:

Adversarial scenarios for mature security teams and regulated environments.

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IT Health Check:

CHECK approved IT Health Check (ITHC) is a Penetration Test audited by the National Cyber Security Centre (NCSC).

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Build Reviews:

Assess the configuration of the operating system, device configuration and its settings against industry benchmarks.

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Penetration Testing Success Stories

Penetration Testing


Moat-Homes-Success-Story

Moat Homes

Moat strengthens housing sector cyber resilience with CyberLab, securing 24/7 protection and Penetration Testing for trusted resident data.

“We know that our customers, colleagues and partners trust us with their personal data, and we take that responsibility very seriously. CyberLab’s deep technical knowledge and proactive support have been instrumental in helping us navigate complex threats with confidence. Their team of experts have become a trusted extension of our IT function.”

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Penetration Testing


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Sealey Group

From e-commerce security to 24/7 threat monitoring, Sealey Group trusts CyberLab to protect their business and customer data from evolving cyber threats.

“Working with CyberLab has greatly enhanced our cyber security posture. Their proactive approach and tailored solutions have strengthened our defences, ensuring our customer data and operations remain secure. The 24/7 support and expert guidance from their team have been invaluable, allowing us to focus on serving our customers with confidence and peace of mind.”

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Industry Expertise Your Can Trust

We don’t just test technology. We test environments like yours, with domain-specific threat modelling and practical remediation.

Clinical systems, legacy infrastructure, patient portals, third-party suppliers.

“Having used CyberLab before in a previous Head of IT role, I had no hesitation in engaging them again to assist us with our security needs. Simply, I wouldn’t use them if they didn’t consistently deliver value.”

– Head of IT, NHS Trust

OT/IoT, production systems, cloud-connected machinery.

“CyberLab’s expertise in safeguarding our organisation against evolving cyber threats has been instrumental in protecting our reputation and maintaining our competitive edge. Their tailored solutions give us the confidence to focus on growth, innovation, and excellence.”

– Phil Ord, Managing Director, FMUK

Identity-heavy estates, ageing systems, safeguarding- sensitive data.

CyberLab are always there to help. Being able to pick up the phone or email and have access to a dedicated account manager who is always there to assist provides excellent value for us. Not only when it comes to renewal but also throughout any period of the contract, CyberLab are able to support and provide guidance.”

- Simon Hobdell, Technical Team Leader, Buckinghamshire Council 

Digital platforms, supply chain risks, customer data, payments compliance.

“Working with CyberLab has greatly enhanced our cyber security posture. Their proactive approach and tailored solutions have strengthened our defences, ensuring our customer data and operations remain secure. The 24/7 support and expert guidance from their team have been invaluable, allowing us to focus on serving our customers with confidence and peace of mind.”

– Tim Thompson, Operations Director, Sealey Group

Websites and applications, innovative solutions and customer data.

“CyberLab’s team thoroughly and efficiently supported us in bringing best practice to our security processes. With a consultative approach, they guided us to modify and improve our existing processes to make Delvify a more robust and more secure organisation.”

– Charles Allard, Founder of Delvify

Public services, critical infrastructure and sensitive data.

“We needed to find a way to meet very tight budget constraints. Of the suppliers we spoke to, only CyberLab demonstrated what we felt was a genuine desire to engage with us to reach a workable solution for both parties. I’d recommend CyberLab not just for their expertise in the whole cybersecurity area, but for their personalised and professional approach.” 

- Mark Smith, Server Support Manager, Nottingham City Council

What You Get

Comprehensive deliverables that drive real security improvements.

Complete Deliverables

  • Clear, executive-friendly summary
  • Full CREST/CHECK methodology
  • Exploitation walkthroughs and evidence
  • Prioritised remediation guidance
  • Optional remediation assistance
  • Re-test and compliance evidence
  • Measurable HackRisk score improvement
  • Dedicated consultant & project manager
  • UK-based, SC-cleared experts throughout

CyberLab delivers:

Next-day penetration testing for urgent timelines
Predictable pricing for mid-market organisations
Government-grade expertise with real-world practicality
Pen testing that doesn’t stop at a PDF report

Book your test or request a quick scoping call. Start seeing measurable risk reduction, not just tick-box reports.

Speak with an ExpertGet Free HackRisk Report

Meet The Security Testing Team

Life as an Ethical Hacker Explained

With Tom Unsworth, Security Consultant at CyberLab

Discover how CyberLab’s ethical hackers uncover hidden risks, tackle modern threats, and keep businesses secure in our Tales from the CyberLab podcast.

What Your CyberLab Penetration Testing Service Includes?

A step-by-step guide to our security testing services and what you can expect from our team.
The way we structure our Pen Tests aligns closely with the steps taken by
bad actors to target and compromise your systems.
We replicate the approach of real-world adversaries to simulate and evaluate
how your systems and processes respond to a cyber attack.

One of our CREST, CHECK, and Cyber Scheme certified consultants will work with you to define the scope of the engagement and ensure that our tests will fulfil your requirements.

Your assigned consultant will gather information on your organisation, including:

  • IP addresses of websites and MX records
  • Details of e-mail addresses
  • Social networks
  • People search
  • Job search websites

This information will assist in identifying and exploiting any vulnerabilities or weaknesses.

Collaboratively administrate empowered markets via plug-and-play networks. Dynamically procrastinate B2C users after installed base benefits. Spectacular visualize customer directed convergence without revolutionary ROI.

Efficiently unleash cross-media information without cross-media value. Quickly maximize timely deliverables for real-time schemas. Spectacular maintain clicks-and-mortar solutions without functional solutions.

Once we have identified vulnerabilities, we will attempt to exploit them in order to gain entry to the targeted system.

There are three phases to this stage:

  • Exploit – use vulnerabilities to gain access to a system, e.g. inject commands into an application that provide control over the target.
  • Escalate – attempt to use the exploited control over the target to increase access or escalate privileges to obtain further rights to the system, such as admin privileges.
  • Advance – attempt to move from the target system across the infrastructure to find other vulnerable systems (lateral movement) potentially using escalated privileges from target systems and attempting to gain further escalated privileges and access to the network.

Your Penetration Test Report will detail any identified threats or vulnerabilities, as well as our recommended remedial actions. Threats and vulnerabilities will be ranked in order of importance.

The report will also contain an executive summary and attack narrative which will explain the technical risks in business terms. Where required, we can arrange for your CyberLab engineer to present the report to the key stakeholders within your organisation.

You can download an example Penetration Test report.

The report will provide information on remedial actions required to reduce the threats and vulnerabilities that have been identified.

At this stage, we can provide you with the additional consultancy, products, and services to further improve your security posture.

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One of our CREST, CHECK, and Cyber Scheme certified consultants will work with you to define the scope of the engagement and ensure that our tests will fulfil your requirements.

Your assigned consultant will gather information on your organisation, including:

  • IP addresses of websites and MX records
  • Details of e-mail addresses
  • Social networks
  • People search
  • Job search websites

This information will assist in identifying and exploiting any vulnerabilities or weaknesses.

Collaboratively administrate empowered markets via plug-and-play networks. Dynamically procrastinate B2C users after installed base benefits. Spectacular visualize customer directed convergence without revolutionary ROI.

Efficiently unleash cross-media information without cross-media value. Quickly maximize timely deliverables for real-time schemas. Spectacular maintain clicks-and-mortar solutions without functional solutions.

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Cyber Diagnosis eBook Cover

E-BOOK

The 2025 Security Testing Report

Discover the 12 most frequent vulnerabilities uncovered by CyberLab’s penetration testers over the past year.

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FAQs:

Using a third party to assess your systems allows them to ‘think like an attacker’ and bring a fresh perspective to your cyber security.
Pen Testing can pinpoint weak points in your defences and highlight areas that can be improved using your existing security technology.
Incorporating regular Penetration Tests into your planning helps you to stay on top of your security posture, preserve your brand, and maintain regulatory compliance to standards and regulations including GDPR, PCI DSS, and ISO 27001.

Vulnerability Assessments are used to identify system and software vulnerabilities and provide a high-level overview of overall security posture. They are an effective way for companies who do not have visibility of their security posture to gain a more complete understanding. For organisations with legacy infrastructure, it is a quick and cost-effective way to identify and focus on software and systems that can be fixed easily.

A Penetration Test not only identifies security issues within the company’s infrastructure, systems, and operations, but also exploits these vulnerabilities and, if necessarily, combines them to achieve a specific objective. 

For example, if the tester’s objective is to gain internal network access, they would find a vulnerability that allows them to upload files, then another one that lets them find those files, and another one that marries these up to execute something malicious.

It’s not the testing process that matters the most – it’s implementing the remediation actions from the reports to proactively improve your security posture.

Our team of experts can help you demystify a Pen Test report and incorporate the fixes.

Get a Free HackRisk Report today with a trial of our HackRisk platform which does a Dark Web, Recon and Vulnerability Scans of your attack surface >

CREST, CHECK & Cyber Scheme Certified

CREST (the Council of Registered Ethical Security Testers) is an international accreditation with a strict Codes of Conduct and Ethics. CHECK is the Government-backed accreditation from the National Cyber Security Centre (NCSC) which certifies that a company can conduct authorised penetration tests of public sector systems and networks.

All our penetration testers are certified by CREST, with senior consultants certified by CREST to the highest CCT Level. Our testers are also either CHECK Team Leaders (CTL’s) or Team Members (CTM’s).

Security testers that pass the Cyber Scheme exams demonstrate ‘competence and skill at the highest levels’ as defined by the National Technical Authority for Cyber Security (NCSC).

Our team have decades of combined experience and take pride in operating at the highest level of the industry – conducting a broad range of government and commercial tests – and always aim to go the extra mile.

  • Stay Ahead of Cyber Threats

Proactively identify and fix security vulnerabilities before cyber criminals exploit them. Penetration testing helps you stay one step ahead, protecting your business from costly breaches.

  • Strengthen Your Security Posture

A single weak link can bring down an entire system. Pen testing exposes gaps in your defences, giving you actionable insights to fortify your infrastructure and reduce risk.

  • Ensure Compliance and Avoid Fines

Meet regulatory standards like GDPR, PCI DSS, and ISO 27001 with regular security testing. Stay compliant, avoid costly fines, and demonstrate your commitment to data protection.

  • Protect Your Brand and Reputation

A security breach can destroy customer trust in seconds. Pen testing helps safeguard your data, keeping your brand untarnished and your customers confident in your security.

Yes. Different frameworks have different requirements. 

  • ISO 27001 (Information Security Management System)

ISO 27001 is a globally recognised framework for managing information security risks. While penetration testing is not explicitly required, it plays a crucial role in meeting the standard’s risk assessment requirements by identifying weaknesses in systems and strengthening security controls.

  • SOC 2 (System and Organization Controls 2)

SOC 2 is a security and privacy framework for companies handling customer data, ensuring they meet trust principles like security and confidentiality. While penetration testing is not mandatory, it provides valuable evidence of strong security practices, helping businesses demonstrate compliance with SOC 2 standards.

  • PCI DSS (Payment Card Industry Data Security Standard)

PCI DSS is a mandatory security standard for businesses handling cardholder data, designed to protect against fraud and breaches. Penetration testing is a requirement under PCI DSS, helping organisations identify vulnerabilities in cardholder data environments and ensure security controls are effective.

  • DORA (Digital Operational Resilience Act)

DORA is an EU regulation focused on strengthening cyber resilience in financial institutions. It mandates security testing, including penetration testing, to assess and enhance an organisation’s ability to withstand cyber threats, ensuring financial systems remain secure and operational.

  • HIPAA (Health Insurance Portability and Accountability Act)

HIPAA is a US law protecting sensitive patient health information (PHI). While it does not explicitly require penetration testing, regular security testing helps healthcare organisations identify and fix vulnerabilities, reducing the risk of breaches and ensuring compliance with HIPAA’s security rules.

  • FTC (Federal Trade Commission Regulations)

The FTC enforces consumer protection laws, requiring businesses to implement reasonable security measures to protect customer data. Penetration testing helps companies identify risks, strengthen defences, and demonstrate due diligence in safeguarding sensitive information.

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Speak With an Expert

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Whether you’re looking to implement basic cyber security best practice, improve your existing defences, or introduce a new system or solution, our team of expert consultants, engineers, and ethical hackers are here to help.

Our team specialise in creating bespoke security solutions and testing packages to improve and maintain your security posture.

We are 100% vendor agnostic and will only ever recommend the best products and solutions for your requirements.