Find the gaps before an attacker does.
Authorised penetration testing, red teaming, vulnerability assessment, social engineering, and threat intelligence. Manual, scope-aware cybersecurity testing with clear, prioritised, developer-ready findings.
What Offensive Security covers.
Automated scanning tells you what is theoretically exposed. Offensive security tells you what an attacker could actually do with it. Every engagement is scoped in advance, authorised in writing, and conducted within agreed rules of engagement. Our offensive security services span the full proactive security spectrum, from broad vulnerability assessment through to objective-based red team engagements that simulate real-world attacks against your people, processes, and technology.
Who needs offensive security testing
Who needs these services? Any organisation that holds sensitive data, faces a compliance requirement, or simply cannot afford to find out about a breach after it happens. Cybersecurity is not only a large-enterprise concern. A company of 50 people with a cloud-hosted SaaS product and customer payment data has the same exposure as a much larger one. Our security team works with organisations across healthcare, fintech, SaaS, and regulated industries where a breach carries legal, regulatory, or reputational consequences.
How we scope an engagement
Each engagement begins with a scoping call. We agree the targets, methodology, testing windows, and rules of engagement before any work begins. For penetration testing and vulnerability assessment, that typically takes a day or two. For red team engagements, scoping is more detailed because the exercise spans weeks and tests detection and response capabilities across multiple vectors. Every engagement is hands-on, conducted by experienced security professionals, not delegated to automation with a human name on the cover.
The report you get
What you get at the end is a report a real person can act on. Executive summary for leadership, technically detailed findings with reproduction evidence for your engineering team, a risk rating, and prioritised remediation guidance. We do not hand you a raw scanner dump. We validate every finding, discard false positives, and explain clearly what the issue is, why it matters, and how to fix it. Proactively addressing security weaknesses before an attacker finds them is cheaper, faster, and less damaging than incident response after the fact.
What our testing covers
Our offensive security testing covers network and infrastructure penetration testing, web application and API security assessment, red team and adversary emulation, social engineering, firewall configuration review, and threat intelligence. Where your security programme or a regulator requires CREST penetration testing, we deliver it through our CREST-member partner. If you are building or maturing a security programme and are not sure which service fits your situation, a vulnerability assessment is usually the right starting point. We will tell you plainly which engagement makes sense for your current security posture.
Specialist expertise and threat intelligence
Every engagement ends in a report a real person can act on: an executive summary, technically detailed findings with evidence, a risk rating, and prioritised remediation guidance. Our security experts work hands-on across network security, application security, and infosec disciplines. We can also deliver threat intelligence to show you what your external exposure looks like and which cyber threats and threat actors are relevant to your sector. If you want a named tester who has carried an OSCP or equivalent, ask on the scoping call and we will confirm the team.
Why proactive testing beats incident response
Incident response is a costly way to learn about a gap. Offensive security testing is the proactive alternative: find the weakness, understand its real-world impact, and close it before someone else finds it first. We scope engagements to your budget and your assurance goal, so you get evidence that is useful to your security team, your board, and your customers.
What we deliver.
Vulnerability Assessment
A systematic scan and human-validated review of your networks, hosts, and applications. You get real risk, not a raw scanner dump.
Learn morePenetration Testing
Manual-led penetration testing of your networks, applications, cloud, and APIs. We exploit what we find, prove the impact, and tell you exactly how to fix it.
Learn moreCREST Penetration Testing (CREST-member Partner)
CREST penetration testing for the frameworks and buyers that require it. Delivered through our CREST-member partner, with Onyx Security Labs scoping and coordinating the engagement.
Learn moreRed Teaming
Objective-based adversary emulation across people, process, and technology. We pursue a defined goal the way a real attacker would, and measure whether your team detects and responds.
Learn moreSocial Engineering
Authorised phishing, vishing, and pretext testing that measures how your organisation responds to human-targeted attacks. Constructive reporting, no naming of individuals.
Learn moreFirewall Configuration Review
A systematic review of your firewall and network device configurations against recognised benchmarks and your own segmentation policy. We find the permissive rules, the gaps, and the orphaned entries.
Learn moreApplication Security Assessment
Deep security testing of your web, mobile, and API applications aligned to OWASP. Manual-led findings with root-cause explanation and developer-ready remediation.
Learn moreThreat Intelligence
See your organisation the way an attacker sees it. External attack surface discovery, leaked-credential and brand exposure monitoring, and threat profiling for your sector.
Learn moreReady to simplify security and compliance?
Pick a service, book a scope call, or ask a question. Whatever order works.