Managed IT Servicesfor Manufacturing

The convergence of operational technology and information technology is the defining IT challenge for modern manufacturers. Twenty years ago, your plant floor network was completely air-gapped from your corporate network. PLCs talked to HMIs over serial connections. SCADA systems ran on dedicated, isolated networks. The idea of connecting a CNC machine to the internet would have been considered absurd and dangerous.

Today, that air gap has been systematically eliminated in pursuit of efficiency. Industry 4.0, the Industrial Internet of Things (IIoT), digital twin technology, predictive maintenance, and real-time production analytics all require data to flow between the plant floor and the corporate network, the cloud, and in many cases, external partners and customers. This connectivity delivers enormous value, but it also means that a phishing email opened by someone in accounting can now potentially reach the PLCs controlling your production line.

PTG approaches OT/IT convergence security using the Purdue Enterprise Reference Architecture (PERA) model, which defines hierarchical levels from Level 0 (physical process) through Level 5 (enterprise network and internet). We implement security controls at each level boundary, with particular attention to the DMZ between Level 3 (site operations) and Level 4 (enterprise network). This DMZ is the critical boundary that prevents IT threats from reaching OT systems while allowing authorized data flows for ERP integration, analytics, and remote monitoring.

Within the OT network, we deploy industrial-grade security tools that understand manufacturing protocols. Standard IT security tools generate massive false positive volumes when they encounter Modbus TCP, EtherNet/IP, or PROFINET traffic because they do not understand these protocols. OT-aware security tools can baseline normal control system behavior, detect anomalous commands (like an unauthorized firmware update to a PLC), and alert your security team without interfering with production processes. This is passive monitoring with no inline devices that could introduce latency or create a single point of failure in your control system.

Remote access to OT systems is another area that requires careful design. Maintenance engineers, equipment vendors, and system integrators often need remote access to PLCs, HMIs, and SCADA systems for troubleshooting and maintenance. PTG implements jump servers and privileged access management (PAM) solutions that provide controlled, audited, time-limited remote access to OT systems. Every remote session is recorded, every command is logged, and access is revoked automatically when the maintenance window closes. We never allow direct VPN access from the internet to an OT network. The principle of least privilege applies even more strictly in OT than in IT, because the consequences of unauthorized access are physical, not just digital.

Manufacturing faces a unique threat landscape where cyberattacks can cause physical damage, safety hazards, and massive financial losses beyond data theft. The Triton/TRISIS malware discovered at a Saudi Arabian petrochemical plant in 2017 was specifically designed to disable safety instrumented systems (SIS), the last line of defense that prevents industrial equipment from causing explosions, chemical releases, or other catastrophic failures. While this was a nation-state attack, the techniques have been studied and adapted by criminal groups.

Ransomware is the most common attack type targeting manufacturers. The LockBit, BlackCat/ALPHV, and Cl0p ransomware groups have all specifically targeted manufacturing companies. A ransomware attack that encrypts your ERP system means you cannot process orders, manage inventory, or ship products. An attack that reaches your MES (Manufacturing Execution System) or SCADA historian means you cannot track production data, maintain quality records, or prove regulatory compliance. An attack that affects PLCs or HMIs means production lines stop entirely.

PTG's managed detection and response service deploys both IT and OT security monitoring. On the IT side, we use advanced EDR, SIEM, and threat intelligence to detect and contain ransomware, business email compromise, and data exfiltration attempts. On the OT side, we deploy passive monitoring tools that analyze industrial protocol traffic for anomalies, detect unauthorized changes to PLC programs, and alert on unusual network activity between IT and OT zones. This dual monitoring approach provides visibility across your entire attack surface.

Intellectual property theft is another major concern for manufacturers. Your CAD files, manufacturing processes, formulations, and customer lists represent years of investment. Nation-state groups, particularly those affiliated with competitor nations, specifically target U.S. manufacturers to steal trade secrets and competitive intelligence. A single exfiltrated design file can eliminate years of competitive advantage. PTG implements data loss prevention controls, access monitoring, and encryption that protect your intellectual property from both external attackers and insider threats.

Legacy system vulnerabilities compound the challenge. Many manufacturers run Windows XP, Windows 7, or even Windows 2000 on HMI workstations and SCADA servers because the control system software requires those operating systems and the vendor has no migration path to a modern platform. These systems cannot receive security patches and often cannot run modern endpoint protection agents. PTG addresses this through network segmentation, application allowlisting, and compensating controls that protect legacy systems without requiring them to be upgraded or replaced. When combined with our managed security services, these controls create a defensible architecture even in environments with significant legacy technology.