There’s good news, and not-such-good news, in the construction industry.
The good news is that most construction firms, including general contractors (GCs), are vetting their subcontractors beyond just pricing to issues such as safety, licensing, and insurance.
The not-such-good news is that cybersecurity is often not included in that list even though it’s a common entry point in the industry for cybercrimes, from ransomware to wire fraud. As cybercrimes become more frequent and more sophisticated, the threat will grow.
Why Construction Is a Prime Target
While most industries depend on digital technology, not too many are as interconnected as construction. Owners, architects, engineers, GCs, subcontractors, suppliers, and consultants all have to work together to ensure a successful build. As a GC managing a commercial build, over the course of a project you might add a dozen or more specialty trades in your supply chain to your shared systems. While digital tools make construction projects more efficient, they also expand the number of ways attackers can get it. Employing connected capabilities from building information modeling (BIM) platforms and document repositories to communications applications and connected equipment can expand the attack surface. That expansion is one of the things driving exponential growth in the construction cybersecurity market, now at over 21% annually according to Research and Markets.1
The Cost of One Weak Link
Many smaller specialty contractors simply don’t have the resources to implement the cybersecurity protections today’s threat and regulatory landscape demands. Email security, incident response planning, 24/7 monitoring, and other essential safeguards are often limited or missing altogether. If you never ask about their security posture before granting access to your project, that oversight can become a costly mistake.
Missing that step can be costly. IBM’s 2025 Cost of a Data Breach Report found the global average cost of a data breach reached $4.44 million. In the industrial sector, the average cost was even higher at $5.56 million, up from $5.56 million, up from $5.0 in 2024.2 The more subcontractors brought onto a project, the more entry points are created. A subcontractor-driven breach can create exposure on two fronts: the direct cost of recovery, and the contractual liability when project data is accessible through an unsecured third-party connection.
AI Is Raising the Stakes
Artificial intelligence (AI) introduces a different kind of risk, too. Project teams are under pressure to move faster, and they’re turning to AI to summarize contracts, review drawings, draft RFIs, or analyze project documents. If a subcontractor is using public AI without your permission, you may lose control of sensitive information. Around 97% of organizations who experienced an AI-related breach in 2025 felt they didn’t have the necessary controls in place, making them vulnerable to broad data compromise and operational disruption.4
You Can’t Protect What You Can’t See
Construction projects rely on dozens of companies working together every day. The moment you give a subcontractor or supplier access to your project systems, they become part of your security environment. That’s why it’s not enough to qualify partner based only on safety, insurance, and experience. You also need to understand how they protect the systems and data they’ll be trusted to access. Without that visibility, you’re managing risk you can’t see.
- Limit access. Give each subcontractor access only to the systems and information they need to do the job.
- Protect project communication. Use identity management, monitor for unusual login activity, and secure the email addresses and domains your project teams rely on, because phishing is the most common initial attack method in construction.3
- Document your security posture. Whether you’re responding to a client questionnaire or a federal agency audit, you should be able to demonstrate the cybersecurity controls you have in place.
The good news is that you don’t need to build a large internal cybersecurity team to tackle this. Many mid-market GCs don’t have a dedicated security staff, and for many, that isn’t realistic. What matters is having the right partner, someone who can help secure the entire project environment, including the risks that come with subcontractor access.
The Accountability Question Is Coming
Every day, construction firms give outside companies access to project management systems, BIM environments, and shared documents. But here’s the question: Do you really know how those companies are protecting your project data?
If you’re not sure, that’s a good place to start. A cybersecurity assessment can help you understand your current risk, identify gaps created by subcontractor access, and prioritize the improvements that will make the biggest difference. It gives you a clearer picture of your exposure before someone else’s problem becomes your own.
Learn more. https://www.nexustek.com/construction
Sources:
1. Research and Markets, Construction Cybersecurity Market Report, January 2026
2. IBM, Cost of a Data Breach 2025, July 2025
3. Coalition, Inc, 2025 Cyber Claims Report, May 2025
4. IBM, Cost of a Data Breach 2025, July 2025