Precursor Security

Precursor Security is a CREST-accredited UK cybersecurity firm headquartered in Leeds, England, founded in 2018. The company operates across four UK offices (Leeds, Newcastle, London, Edinburgh) and delivers services entirely from UK-based staff with no offshoring. The firm offers both offensive and defensive security services across two primary practice areas: Offensive Security: - Penetration testing (web application, infrastructure, cloud, mobile) - Red team assessments - Active Directory exploitation and API security testing - Cloud configuration review Defensive Security: - 24/7 managed Security Operations Centre (SOC) operated from Newcastle - Incident response and digital forensics - Ransomware recovery and breach investigation - Threat hunting using SIEM and EDR platforms (Splunk, Microsoft Sentinel, CrowdStrike, SentinelOne) Compliance and Advisory: - ISO 27001 auditing and implementation - Cyber Essentials and Cyber Essentials Plus assessments - NCSC CHECK assessments - Regulatory compliance consulting for financial services, healthcare (NHS/DSPT), and government sectors The company holds triple CREST accreditation covering penetration testing, vulnerability assessment, and SOC operations. Staff hold certifications including CREST CRT, CRTO, CPSA, OSCP, ISO 27001 Lead Auditor, and CRISC. All personnel are DBS-checked, with some holding SC (Security Check) clearance for public sector and critical national infrastructure (CNI) engagements. Target sectors include financial services, healthcare, government, critical national infrastructure, and technology companies.