EPC stands for engineering, procurement, and construction. It describes a project delivery model used for large industrial jobs such as power plants, factories, refineries, and other capital projects. An EPC contractor may design the system, buy major equipment, coordinate subcontractors, and manage on-site construction until handover.
In cyber security, EPC firms matter because they sit at the center of many suppliers, engineering files, schedules, and operational environments. Their networks often store sensitive drawings, contracts, bids, and project controls that can be valuable to extortion groups. Attackers may target these organizations to steal data, disrupt timelines, or pressure clients and partners. Defenders should treat EPC environments as high-risk: segment business and project networks, protect remote access, monitor for unauthorized file transfer, and verify backups for engineering and operational data. In practice, an EPC label tells defenders they are dealing with a complex industrial supply chain, not just a simple office business.