Security Without
Compromise.
We started Precursor with a simple mission: to bridge the gap between offensive intelligence and defensive operations. Today we're a full-spectrum, triple CREST-accredited cyber security partner built on that same principle.
100% UK-Based.
Zero Offshoring.
We operate entirely from our headquarters in Leeds. Your data never leaves UK jurisdiction and our team is always within reach, because true security requires local accountability.
Our Philosophy
Security isn't just about tools. It's about mindset, expertise, and unwavering trust.
Demystify Security
We don't hide behind jargon. We explain complex threats in plain English so you can make informed decisions about risk and investment.
Uncompromising Quality
Every test is manual-led. Every alert is human-verified. We refuse to automate away the critical thinking required for true security.
True Partnership
We act as an extension of your internal security team, available on call for advice and guidance long after the report is delivered.
Our Journey
From a boutique consultancy to a full-spectrum cyber security partner.
The Inception
Precursor Security was founded to disrupt the tick-box penetration testing market, delivering real, actionable security intelligence instead of compliance paperwork.
CREST Accreditation
Received CREST Penetration Testing and Vulnerability Assessment accreditation, joining an elite group of independently certified offensive security providers.
Expanding Defence
Recognising clients needed 24/7 protection, we launched our Managed SOC and integrated offensive findings directly into defensive detection rules from day one.
CREST SOC Accreditation
Achieved CREST SOC accreditation within six months of launch, joining fewer than 70 CREST-accredited SOCs globally and cementing our full-spectrum capability.
Global Reach, UK Sovereignty
We protect organisations worldwide while maintaining 100% UK-based sovereign operations, data residency, and a triple CREST-accredited capability set.
Ready to secure your future?
Join the hundreds of organisations that trust Precursor with their most critical assets.
Frequently Asked Questions
Common questions about this service, methodologies, and deliverables.
Precursor Security is triple CREST-accredited across Penetration Testing, Vulnerability Assessment, and Security Operations Centre (SOC) services. We also hold Cyber Essentials Plus certification, demonstrating that our own infrastructure meets the same standards we help clients achieve.
Yes, 100%. We are headquartered in Leeds and operate a dedicated physical CREST-accredited Security Operations Centre in the UK. All staff are UK-based, all data remains within UK jurisdiction, and we never offshore any part of an engagement. This provides the data sovereignty and accountability that regulated organisations and central government require.
We were founded in 2018. Over eight years we have grown from a boutique penetration testing consultancy to a full-spectrum cyber security partner delivering offensive security, 24/7 managed SOC, and compliance services to organisations across financial services, healthcare, critical infrastructure, and the public sector.
Our consultants and analysts hold CREST-recognised certifications including CRT (Registered Tester), CPSA (Practitioner Security Analyst). We also carry certifications from OSCP, eJPT, and other specialist awarding bodies. Every engagement is delivered by senior practitioners. We do not staff engagements with graduates or trainees.
Yes. We regularly partner with FTSE-listed companies, NHS trusts, financial institutions regulated by the FCA and PRA, and central and local government bodies. Our CREST accreditation and UK sovereign operations make us an approved supplier for frameworks including G-Cloud and Crown Commercial Service agreements.
Large SIs sell capacity; we sell expertise. Every client works directly with senior analysts and testers, not account managers who hand off to offshore delivery teams. Our offensive and defensive capabilities are integrated by design: findings from penetration tests feed directly into SOC detection rules, so your defences improve in real time. We remain accountable for outcomes, not just outputs.
All client data, including vulnerability findings, network artefacts, and credentials discovered during testing, is processed exclusively within UK borders, stored on UK-hosted infrastructure, and deleted in line with your agreed data retention schedule. Our own Cyber Essentials Plus certification ensures our internal controls meet the same baseline we assess our clients against. We are happy to sign a Data Processing Agreement (DPA) as part of any engagement.