Project management systems inaccessible from job sites

Procore, Buildertrend, PlanGrid, and similar platforms require reliable connectivity to function. When field supervisors can't access updated drawings, submit RFIs, or update daily logs because connectivity is unreliable or the VPN fails, project coordination collapses to phone calls and paper — introducing errors and delays that compound through the project timeline.

Subcontractor access that never gets cleaned up

Temporary access granted to subcontractors for project collaboration rarely gets revoked when the project ends. Subcontractor email accounts, shared folder permissions, and VPN credentials accumulate across every completed project — creating a growing catalog of external access that your team doesn't track and can't audit.

Ransomware targeting construction firms through phishing

Construction firms receive hundreds of vendor emails, subcontractor invoices, and permit notifications daily — making them high-value phishing targets. A single successful phishing attack that encrypts your project files, bid history, and CAD drawings can disrupt multiple active projects simultaneously while you spend days or weeks recovering.

Unmanaged devices on company networks

Personal laptops, tablets, and phones used by field staff to access company systems represent unmanaged endpoints with no visibility, no endpoint protection, and no way to remotely wipe company data if the device is lost on a job site. Construction firms routinely have more unmanaged devices touching company data than managed ones.

No business continuity planning for multi-project disruptions

An IT failure during a single active project is disruptive. An IT failure during four active projects with overlapping timelines, shared resources, and coordinated subcontractors is potentially catastrophic. Construction firms rarely have continuity plans that account for multi-project operational complexity.

IT decisions made at procurement, not at planning

Technology decisions for construction operations are often made when hardware fails, not during project planning. Reactive technology procurement means field teams work around tools that don't fit their workflows instead of tools designed for how they operate.

Construction firms occupy a unique position in the phishing threat landscape. They regularly communicate with dozens of subcontractors, material suppliers, permit agencies, and clients — all via email, and often via email addresses that aren't validated against expected sender lists. This makes construction project communication a natural attack surface for business email compromise.

Supply chain phishing in construction typically works like this: an attacker compromises a legitimate subcontractor's email account, monitors their communication with your firm, and then sends a fake invoice or wire transfer redirect from the legitimate (now compromised) account. Because the email comes from a known sender with a real domain and a real email history, it bypasses basic phishing filters and looks completely legitimate to your accounts payable team.

The controls that protect against supply chain BEC aren't about training your team to spot bad emails — they're about building verification workflows that don't rely on email alone for high-value transactions. Out-of-band verification (calling a known number, not one from the email) for any payment or wire transfer change request is the single most effective control. Combined with DMARC enforcement on your domain and Safe Attachments scanning on incoming documents, it breaks the attack chain at multiple points.

AC4S Technologies implements for construction firms: DMARC/DKIM/SPF enforcement, Safe Links and Safe Attachments via Microsoft Defender, security awareness training with construction-specific phishing simulation scenarios, documented payment verification procedures, and subcontractor access reviews on a project-completion cycle.