Key Takeaways
- AEC firms are high-value targets — project files worth millions are routinely ransomed or resold after breaches.
- Third-party consultants and contractors are a common entry point, especially when working from unsecured home networks.
- Role-based permissions, VPNs, and encrypted attachments are the baseline controls every AEC firm should have in place.
Cybercrime isn’t unique to AEC — it’s on the rise across all industries in Australia. Between 2024 and 2025, the Australian Cyber Security Hotline received 42,500 calls. The figure represents an increase of 16% from the 2023-2024 report, proving that cybercrime is a growing threat.
However, the AEC industry faces unique risks.
Sharing sensitive project files with external clients and consultants is a necessary part of the job. But the more individuals you share the files with, the higher the risk of data leaks and unauthorised access.
AEC Workers Handle Large Amounts of Sensitive Data Every Day
That data includes architectural plans, client specifications, personal information, and financial records — all of which are attractive to cybercriminals.
The volume of data also grows as a project progresses. Early-stage design files give way to detailed engineering drawings, procurement records, and subcontractor agreements.
By the time a project reaches construction, the data trail is extensive. Each new file added to the system is another potential entry point.
Project Files Are High-Value
The projects that AEC companies work on are worth millions of dollars. The AEC market reached a value of AUD $409.67 million in 2025.
Public-sector spending drives long-term AEC projects and funds them with significant capital investment. Everything, right down to the engineering plans, is worth a lot of money.
Once cybercriminals access these valuable files, they can exploit them for resale or ransom. Cybercriminals force AEC companies to pay huge amounts of money to retrieve the stolen files.
External Parties Present Vulnerabilities
Sharing files with third parties (vendors, contractors, consultants) exposes files to new cyber threats. Third parties may not have the same level of security as your company. That security gap gives hackers a direct entry point into your infrastructure.
A consultant working from a home network with no endpoint protection can undo careful internal security measures in one step.
Hackers know this. They also know that targeting a less-protected external party is often far easier than attacking a firm directly.
Common Cybersecurity Risks When Sharing Files
As files move between parties, the following risks can arise:
- Email interception. Project work completed on unsecured networks could leave files open to attack during email transfers.
- Weak login credentials. Guessable login credentials could be all it takes for a malicious actor to access restricted files. ‘Password123’ and shared team logins are more common than the industry would like to admit.
- Unapproved file-sharing methods. Employees who use unapproved personal emails or social accounts to share files can create huge security gaps.
- Unsecured cloud storage. Poor file permission controls and sharing files beyond the intended recipients can make an entire cloud storage system insecure. Cloud storage is only as secure as the permissions set on the day the file was last checked.
Secure File Sharing Best Practices
Overlooked process vulnerabilities result in files falling into the wrong hands. Using unsecured networks, failing to check file permissions, and neglecting file version control can leave sensitive project data exposed. The following best practices close those gaps.
Use a VPN for Remote Access
Remote workers should always use a VPN (Virtual Private Network). VPNs encrypt data between devices and private servers, creating a secure internet connection. Also, instead of handing third parties direct credentials to your cloud storage or project management platform, route their access through a company-controlled VPN tunnel.
Manage File Access
Always keep file access limited to only those who need to view or edit project documents. Managing role-based permissions should be an ongoing task. It’s also important to revoke file permissions from completed tasks. Remove permissions from former employees and contractors as soon as the collaboration ends.
Encrypt Email Attachments
If you send project files by email, encrypt every attachment. If you send an open document, you could send it to the wrong recipient, or a cybercriminal could intercept your email. Create private links that are only accessible using a username and password.
Use Secure File-Sharing Platforms
A file-sharing platform is preferred over sending files via email. A high-grade platform will bring encryption, access controls, and activity tracking into a single dashboard. Beyond managing files, it lets you introduce standardised file-sharing protocols across the team.
Split Files Into Categories
Classify files by sensitivity level. For example, your classifications could be ‘public’, ‘internal’, ‘private’, and ‘restricted’. Creating categories allows you to determine file access settings. It also helps prevent you from sharing a file with the wrong person.
Building Secure Habits
File sharing is a key component of AEC workflows. Without it, remote work, digital collaboration, and real-time coordination would be impossible. However, proper management is essential.
Don’t take any risks. Use a VPN, encrypt email attachments, use file-sharing platforms, categorise files, and manage file access on an ongoing basis. In an industry where a single leaked set of engineering plans can derail a multimillion-dollar project, build the cybersecurity habits now — it’s better than the alternative.
