Penetration Testing Sheffield
Precursor Security is a CREST-accredited penetration testing company serving Sheffield and South Yorkshire, delivering web application, external and internal infrastructure, wireless, and cloud penetration testing. Our testers are based 45 minutes away at our Leeds headquarters, so on-site testing in Sheffield is straightforward to schedule, and scoping calls typically happen within 24 hours of enquiry.
CREST-accredited penetration testing for Sheffield organisations: external and internal infrastructure, web applications, wireless, and cloud. Our Leeds headquarters is 45 minutes away, making on-site delivery across South Yorkshire fast and simple.
Security testing for the advanced
manufacturing corridor.
Sheffield's economy pairs a world-class advanced manufacturing cluster around the Advanced Manufacturing Innovation District with a fast-growing digital and healthtech scene in the city centre. Manufacturers face a specific risk profile: flat OT and IT networks, legacy engineering systems that cannot be patched, and supply chain positions that make them a route into larger primes. Digital businesses carry the standard web and cloud attack surface. We test both, from segmentation testing between corporate IT and production networks to full web application and cloud assessments.
Who We Test In Sheffield
Testing scoped to the sectors that define Sheffield's economy, because a meaningful penetration test starts from who actually attacks businesses like yours, and what they are after.
How We Reach You
Sheffield is served from our Leeds headquarters. 45 minutes from Sheffield by rail or via the M1.
CREST-Accredited, Verifiably
Precursor Security holds CREST organisational accreditation for penetration testing, independently audited across methodology, QA, and tester competency. Every engagement letter carries our membership number for direct verification by your auditors, insurers, or customers.
No Travel Games. No Scanner Reports. No Offshoring.
Sheffield clients get the same team, methodology, and day rate as our London and Leeds clients: manual testing by employed, UK-based CREST Registered Testers, fixed quotes agreed at scoping, immediate escalation of critical findings, and free retesting of everything you fix. On-site internal, wireless, and OT-adjacent testing across Sheffield and South Yorkshire, with same-week availability in most cases.
Every Test,
Delivered In Sheffield.
The full offensive security portfolio is available to Sheffield organisations. Each service links to its full methodology, and every engagement ends with reporting your engineers can action and your auditors can file.
Web Application Penetration Testing Sheffield
Manual, CREST-accredited testing of the web applications and APIs your Sheffield business depends on. Full OWASP coverage plus the business logic and access control flaws automated scanners miss, with free retesting of every finding.
Internal & External Network Testing Sheffield
External testing of your internet-facing perimeter, and internal testing that maps what an attacker could reach once inside: Active Directory attack paths, lateral movement, and privilege escalation. On-site delivery in Sheffield.
Cloud Penetration Testing Sheffield
Configuration review and attack-path testing across AWS, Azure, Microsoft 365, and GCP. We find the identity misconfigurations, exposed storage, and over-privileged roles that cause most real cloud breaches.
Wireless Network Testing Sheffield
On-site assessment of your wireless estate in Sheffield: rogue access point detection, segregation between guest and corporate networks, and attacks against enterprise authentication.
Mobile Application Testing Sheffield
iOS and Android application assessments covering insecure storage, API trust boundaries, and platform hardening, for Sheffield businesses shipping mobile products or internal apps.
Cyber Essentials & Compliance Sheffield
Cyber Essentials and Cyber Essentials Plus certification, ISO 27001 support, and PCI DSS testing for Sheffield organisations that need recognised certification alongside technical assurance.
Threat Detection & Response for Sheffield, 24/7.
A penetration test proves what an attacker could do today. Our UK Security Operations Centre watches for the ones who try tomorrow: managed detection and response, a CREST-accredited SOC, and incident response for Sheffield organisations, delivered entirely from UK soil.
Explore Defensive SecurityHow Engagements Run In Sheffield.
From first call to free retest. Every Sheffield engagement is managed by a named account manager with direct access to the testing team, no ticket queues between you and the people doing the work.
Scoping & Fixed Quote
A free scoping call, usually within 24 hours of your enquiry, where a technical consultant (not a salesperson) defines what needs testing, agrees the approach, and produces a fixed quote. Sheffield clients can scope by video call or, where practical, in person via our Leeds headquarters.
Testing In Sheffield
CREST Registered Testers execute the engagement during agreed windows: remote phases for external, web, and cloud testing, and on-site or appliance-based delivery for internal and wireless work in Sheffield. You get daily progress updates, and critical findings are escalated immediately rather than saved for the report.
Reporting Built for Two Audiences
Every report contains an executive summary your board and customers can read, and a technical annex your engineers can action: reproduction steps, evidence, CVSS scoring, and specific remediation guidance. Reports are quality-assured before delivery and structured for auditors, insurers, and customer due diligence reviews.
Debrief & Free Retesting
A full debrief walks your team through findings and attack chains, in person in Sheffield or at our Leeds headquarters where practical, or by video call. Once you have remediated, we retest the fixed findings free of charge and issue updated reporting, so your evidence shows issues closed, not just found.
The best time to test your defences is now.
Join the high-growth companies relying on Precursor for continuous offensive and defensive security.
Frequently Asked Questions
Common questions about this service, methodologies, and deliverables.
Penetration testing for Sheffield organisations typically costs between £2,500 and £25,000 plus VAT depending on scope. A focused single web application or external infrastructure test usually falls between £2,500 and £6,250, most standard engagements land between £3,750 and £12,500, and larger multi-scope programmes range higher. Location does not change our day rate: Sheffield clients pay the same as London clients. Every quote is fixed after a free scoping call, and retesting of fixed findings is included.
Sheffield is served from our Leeds headquarters. 45 minutes from Sheffield by rail or via the M1. On-site internal, wireless, and OT-adjacent testing across Sheffield and South Yorkshire, with same-week availability in most cases. All testing is delivered by UK-based, employed testers, never subcontracted or offshored.
Yes. We deliver OT and IoT security assessments alongside traditional infrastructure testing, which suits Sheffield's advanced manufacturing cluster. Typical engagements include segmentation testing between corporate IT and production networks, reviews of remote access into engineering systems, and passive assessment of OT environments where active scanning is unsafe. Testing windows are agreed around production schedules.
Many do. Public sector frameworks, defence supply chain requirements, and cyber insurance policies increasingly require testing from a CREST-accredited company. Precursor Security holds CREST organisational accreditation for penetration testing, and engagement letters reference our membership number so auditors and primes can verify it directly.
Yes. Precursor Security holds CREST organisational accreditation for penetration testing, the leading UK standard for testing providers, alongside ISO 27001:2022 certification and Cyber Essentials Plus. Testing in Sheffield is delivered by CREST Registered Testers with additional certifications including OSCP, and our engagement letters reference our CREST membership number so auditors, insurers, and customers can verify it directly.