Cyber Security for Construction — UK Builders, Contractors & Engineering
UK construction firms are a top-5 BEC target globally. Sub-contractor invoice fraud alone cost UK construction £12m+ in 2023. CDM 2015 file retention adds years of risk. Ransomware on a main contractor halts site operations. We deliver monitoring, supplier fraud prevention, and BIM IP protection for contractors, fit-out specialists, and M&E firms.
£12m+
annual UK construction sub-contractor invoice BEC losses (Action Fraud)
Top 5 sector
global BEC targets — construction is high on the FBI / Action Fraud list
24/7
Gridisys managed SOC for UK construction SMEs — no contract
6 years
CDM 2015 H&S file retention requirement
Cybersecurity Consulting + 24/7 SOC Monitoring
Every Gridisys engagement is built on two pillars — strategic consulting to design the right controls, and managed SOC monitoring to keep them effective.
Cybersecurity Consulting
UK consulting engagements: risk assessment, security architecture, conditional access design, compliance (Cyber Essentials, UK GDPR, FCA PS21/3, NIS2), incident-response planning. Board-ready documentation, no jargon, no surprise invoices.
- Risk assessment + security architecture review
- Conditional access + Entra ID hardening design
- Cyber Essentials / UK GDPR / FCA / NIS2 compliance support
- Incident response planning + tabletop exercises
- Vendor + supply-chain security assessment
- Board / DPO reporting + evidence pack
Managed SOC Monitoring · 24/7
AI-augmented Security Operations Centre — continuous monitoring across Microsoft 365 / Entra ID, Defender, on-prem, and cloud. UK-based analysts, sub-hour triage on critical alerts. No long contract required.
- 24/7 SIEM monitoring — Microsoft 365, Entra ID, Defender, Azure, on-prem logs
- BEC + mailbox-compromise + OAuth grant abuse detection
- Suspicious sign-in + conditional access drift alerting
- Ransomware + lateral-movement detection from EDR + Defender
- Sub-hour triage on critical alerts, monthly ops report
- Optional + integrated with consulting engagements
Most engagements start with consulting (1-2 weeks), then SOC monitoring (ongoing ) keeps the controls effective.
Pricing tailored to your needs
Every engagement is scoped to your environment and requirements. Book a free consultation for a tailored quote — no obligation.
What we cover
Practical, board-ready consulting — no jargon, no surprise invoices.
Managed SOC for M365 / Entra
24/7 monitoring of project managers', QSs', and buyers' mailboxes — where sub-contractor invoices, supplier bank changes, and project correspondence land. Surfaces the patterns of BEC where attacker impersonates sub-contractor 'updating bank details' on multi-hundred-k invoices.
Sub-contractor + supplier invoice BEC prevention
Specific workflow: callback verification of any new sub-contractor / supplier bank details before first payment; dedicated finance mailbox with restricted sender lists; alert rules for 'urgent payment' / 'change our bank' patterns in buyer mailboxes. Stops the most common losses.
BIM / project IP protection
BIM models, blueprints, project designs, procurement specs — IP valuable to competitors and a common target. We monitor access patterns to your document management system (Procore, Viewpoint, Bentley, Aconex), alert on bulk downloads, after-hours exports, and overseas IPs.
CDM 2015 file retention + protection
Health and safety files under CDM Regulations 2015 must be retained typically 6 years post-completion. These contain personal data, contractor details, defect records — all categories needing access controls. We design retention architecture with secure-inactive storage and audit trail.
Site operations ransomware resilience
If your M365 / ERP is taken down by ransomware, site teams lose: procurement email, payment authorisations, drawing approvals, photo logs. We design backups that restore project-relevant systems in 4-6 hours, with prioritised order per project stage.
Common data environment (CDE) security
Where BIM projects use a CDE (BIM 360, Aconex, Procore), your supplier-side CDE access is high value. We monitor for compromised superuser access, supplier account hijack, and bulk file downloads via CDE API abuse.
How we work
Scoping (Week 1)
Confirm project types (residential, commercial, civils, fit-out, M&E), CIS / payroll arrangement, BIM/CDE vendor, current M365 / Entra posture, sub-contractor volume.
Deploy (Week 1-2)
Connect M365 / Entra to Gridisys SOC. Configure conditional access: MFA everywhere, restrict finance mailbox to named approvers, alert on new sub-contractor email + payment patterns.
Supplier fraud prevention (Week 2-3)
Implement callback verification workflow, train project managers + buyers on supplier-bank-change patterns, set up BEC-pattern alert rules on procurement mailboxes.
Operate (ongoing)
24/7 monitoring + monthly ops-director reporting + on-call for BEC / ransomware triage. Review of any sub-contractor bank changes mid-monitoring.
Sectors we protect
Cybersecurity for construction that protects project margins
Free 30-minute consultation for ops directors, MDs, and project leaders. We assess live sub-contractor BEC exposure + BIM IP risk + ransomware readiness against site ops needs.
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