See the whole picture
Continuous discovery and focused testing help reveal the assets, weaknesses and attack paths that matter.
About Pentesys
Experienced people.
Clear evidence.
Security that stands up.
Pentesys combines continuous technology with experienced human testers. We help organisations see what is exposed, prove what is genuinely exploitable and make the next action clear.
Why Pentesys exists
Cybersecurity should create clarity—not another pile of findings.
Organisations depend on more systems, cloud services and suppliers than ever. That makes it harder to know what is exposed, which weaknesses are real and where limited time should be spent first.
Pentesys was built to close that gap. We combine the speed and reach of technology with the curiosity and judgement of experienced people. The result is security work that is proportionate, understandable and useful after the report has been delivered.
We support organisations that need to protect growth, satisfy customers and regulators, or gain an independent view of whether their defences will stand up to a determined attacker.
What makes us different
Built for decisions, not theatre.
Good assurance should reduce uncertainty. We focus on evidence, context and a practical route forward.
Know what is real
Experienced practitioners verify findings and apply business context, so noise does not crowd out genuine risk.
Act with confidence
Clear priorities, practical remediation guidance and retesting give teams evidence that progress is real.
How we work
The right expertise for the environment—not a generic testing team.
Matched to the work
We align skills and experience to the technology, threat and assurance outcome involved.
Human-led judgement
Qualified practitioners investigate context and attack paths that automated tools cannot understand alone.
Useful reporting
Technical evidence is translated into prioritised actions for engineering teams and decision-makers.
Representative tester expertise
A sample of the experience we can bring to an engagement.
These anonymised profiles are indicative examples of Pentesys testing capability. They are presented without names or photographs for privacy and operational-security reasons, and should not be read as a statement of team size. The people assigned to an engagement depend on scope, availability and the expertise required.
REPRESENTATIVE SPECIALIST · PROFILE A
Offensive security lead
18+ years in offensive security
Leads complex, risk-focused security assessments for government, critical infrastructure and international organisations. Brings cyber and physical testing together to show how a determined attacker could move through a real environment.
BEST SUITED TO
Complex, multi-domain assessments where technical, physical and executive risk need to be considered together.
CORE STRENGTHS
Red teaming and adversary simulationWeb, API, cloud and infrastructure testingPhysical and wireless securityExecutive-ready risk translation
SELECTED CREDENTIALS
OSCPCRTOCyber Scheme TL-INFTigerScheme SSTTigerScheme QSTCisco CCNPAccessData ACE
REPRESENTATIVE SPECIALIST · PROFILE B
Penetration testing lead
11+ years in cyber and physical testing
Combines a disciplined military background with practical penetration-testing leadership. Experienced in assessing digital systems and physical controls for both public-sector bodies and private organisations.
BEST SUITED TO
Structured infrastructure and physical-security engagements requiring disciplined planning and delivery leadership.
CORE STRENGTHS
Infrastructure penetration testingPhysical security assessmentAssessment planning and qualityPublic and private-sector delivery
SELECTED CREDENTIALS
CREST CCTMCyber Scheme TL-INFCRTPOSCP
REPRESENTATIVE SPECIALIST · PROFILE C
Red team lead
15+ years in cybersecurity and intelligence
Plans and delivers threat-led exercises across finance, healthcare, government, telecommunications and aviation. Specialises in showing how attack paths work in practice, then helping defensive teams learn from the evidence.
BEST SUITED TO
Threat-led red and purple team exercises designed to test real attack paths and improve defensive capability.
CORE STRENGTHS
Adversary simulationRed and purple teamingThreat-led test designDomestic and international delivery
SELECTED CREDENTIALS
CRTOCRTPCyber Scheme TL-INFOSCP
REPRESENTATIVE SPECIALIST · PROFILE D
Senior penetration tester
14+ years in hands-on security testing
A versatile senior tester with experience supporting large organisations, government and military bodies, fintechs and growing technology companies. Tests modern applications and infrastructure with a practical focus on exploitable risk.
BEST SUITED TO
Web, mobile, cloud and infrastructure testing where practical remediation guidance is as important as discovery.
CORE STRENGTHS
Web and mobile applicationsCloud environmentsInfrastructure testingClear remediation guidance
SELECTED CREDENTIALS
CRTOCyber Scheme TL-INFCyber Scheme TL-WEBTigerScheme SSTTigerScheme QSTOSCP
REPRESENTATIVE SPECIALIST · PROFILE E
Senior specialist tester
Senior-level offensive security experience
Pairs broad penetration-testing experience with continuous specialist development. Training spans exploit development, malware development, industrial control systems and modern telecommunications, supported by a degree in computer forensics and security.
BEST SUITED TO
Specialist environments involving advanced exploitation, industrial systems or modern telecommunications.
CORE STRENGTHS
Advanced exploit developmentIndustrial control systems4G and 5G telecommunicationsKnowledge sharing and mentoring
SELECTED CREDENTIALS
CRTOCyber Scheme TL-INFCyber Scheme TL-WEBTigerScheme SSTTigerScheme QSTOSCP
Qualifications in practice
Recognised credentials, backed by real delivery experience.
Qualifications help establish a technical baseline. We combine them with peer review, practical experience and a testing approach shaped around your risk.
OSCPCyber Scheme TL-INFCyber Scheme TL-WEBCREST CCTMCRTOCRTPTigerScheme SSTTigerScheme QST
Verified company credentials
Independent evidence, not just claims.
Company credentials and individual tester qualifications prove different things. These current certificates apply to Pentesys Ltd; the representative profiles above show the broader practitioner expertise available for individual engagements.
PENETRATION TESTING · EMEACREST member company
Pentesys Ltd has met CREST requirements for Penetration Testing in EMEA.
Valid to 01 November 2026View CREST certificate ↗
WHOLE ORGANISATIONCyber Essentials certified
Pentesys applies the five core Cyber Essentials controls across the whole organisation.
Recertification due 12 August 2027View Cyber Essentials certificate ↗Customer perspectives
What working with Pentesys feels like.
Verified feedback from customers across testing, attack-surface management and adversary simulation.
See how Pentesys worksPentesys has continuously performed admirably during our collaboration, giving us faith in their knowledge. They delivered work that above our expectations by approaching each project with a deep understanding of our specifications. Their team demonstrated a remarkable degree of proficiency by effectively pinpointing weaknesses and offering practical suggestions to reduce possible hazards.
Unlike previous pentests that produced generic outputs, this engagement gave us clear, prioritised actions with real-world attack scenarios. The platform visibility into assets, vulnerabilities and remediation progress has helped us mature our security posture significantly. The team were professional, responsive, and genuinely cared about improving our security rather than just ticking a box.
The red team and external attack surface management work highlighted blind spots we didn't know existed. What stood out was the strategic guidance alongside the technical delivery – helping us shape a longer-term security roadmap rather than a one-off engagement. This felt like a partnership, not just a transactional assessment.
Pentesys has continuously produced excellent work. Their group demonstrated extraordinary technical proficiency by spotting crucial flaws and offering clever fixes that greatly strengthened our security stance. Their meticulous approach and attention to detail ensured that every facet of the project was covered in full.
We engaged Pentesys and the team for a complex penetration test and adversary simulation. The quality of the technical findings, realism of the attack paths, and clarity of reporting were outstanding. The recommendations were practical and mapped clearly to business risk, which made board-level conversations much easier. We've since built Pentesys into our ongoing security assurance programme.
Talk to Pentesys
Tell us what you need to test or prove.
We'll help shape the scope and identify the right blend of expertise for the work.
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