Manufacturing IT Services
Reviewed by Fully Compliance editorial staff. Last updated: 2026.
Manufacturing MSPs must understand that operational technology (OT) operates under fundamentally different constraints than business IT: continuous availability because production downtime costs money immediately, real-time responsiveness that standard security tools can disrupt, legacy systems that cannot be patched without breaking equipment certification, and physical safety implications that no other IT domain faces. An IT-focused MSP applying standard security practices to OT environments causes production shutdowns and equipment damage.
Your manufacturing facility has a decades-old production control system running equipment that produces your core products. Your IT department recently secured a contract with a new MSP to improve your cybersecurity posture. During the first meeting, the MSP started talking about security patches and network segmentation in ways that made your operations manager uncomfortable. He asked, "If we patch that system, will production shut down?" and the MSP didn't have a good answer. That's the moment many manufacturers realize that IT security and operational technology (OT) security aren't the same thing. An OT-aware MSP understands that industrial control systems have requirements IT systems don't have: continuous availability because production downtime costs money immediately, real-time responsiveness because manufacturing processes wait for no one, specific hardware and software that can't be updated constantly because it's certified for specific equipment, and integration with physical manufacturing processes where security decisions affect physical safety.
Operational Technology Operates Under Different Rules Than IT
This is the fundamental distinction that many manufacturers struggle with when trying to apply standard IT security practices. Operational technology — the systems that control physical processes — operates under different constraints than business IT. A manufacturing control system needs to be always on because turning it off means production stops. It needs to respond to sensor input in real time because manufacturing decisions depend on current data. It may be running software that was written 20 years ago and hasn't been updated because it's certified for the equipment it controls and updating could break that certification. It may be connected to expensive specialized hardware that can't be replaced easily because it's custom-built or no longer manufactured.
Standard IT security practices create direct conflict with these requirements. Mandatory updates and patches may not work with legacy OT systems because the systems don't support the patching process or patches break certification. Network segmentation may prevent essential communication between systems because OT systems need to reach each other to function. Requiring multi-factor authentication on production control systems may introduce latency that disrupts real-time operation. Encryption may add processing overhead that slows response time when the system needs to make real-time decisions. Installing monitoring software may conflict with real-time requirements because monitoring consumes processing power and memory the system needs for manufacturing.
A manufacturing MSP understands that OT security is about managing risk within the constraints of operational requirements, not applying IT security practices universally. They help you think about which controls are feasible and which create unacceptable operational risk. They discuss compensating controls — ways to improve security without breaking production. If you can't patch a legacy PLC because patching would disrupt production, you isolate it on a segmented network so attackers can't reach it. If you can't add encryption because it slows response time, you monitor the network so unauthorized access attempts are detected. Not all OT systems can meet the same security standards as business IT because their operational requirements are different, and that's not a compliance failure — it's engineering realism. According to Dragos's 2024 OT Cybersecurity Year in Review, 72% of OT vulnerabilities discovered in 2024 had no available patch at the time of disclosure, reinforcing that compensating controls are the primary security strategy in manufacturing environments.
Industrial Control Systems Require Specialized Security Approaches
Industrial control systems (ICS) include programmable logic controllers (PLCs) that control individual machines, supervisory control and data acquisition (SCADA) systems that monitor production lines or facilities, and distributed control systems (DCS) that manage complex manufacturing or operational processes. These systems are specialized hardware and software designed for specific manufacturing purposes. They're not general-purpose computers running Windows or Linux. They're embedded systems with specific real-time requirements.
The key differences from business IT include real-time requirements where decisions and responses must happen in milliseconds, not seconds or minutes. A SCADA system monitoring a chemical process might need to react to conditions in milliseconds to prevent equipment damage or safety issues. Continuous uptime requirements because stopping production to patch a system is often unacceptable — the cost of downtime, even one hour, might exceed the cost of the entire system. And integration with physical processes where a delay in a SCADA system that monitors boiler pressure could have safety implications, a firmware update to a PLC that controls production lines could cause the line to miscalibrate and produce defective products, or an ICS security incident could result in equipment damage or physical safety risks, not just data loss.
An ICS-aware MSP recognizes these constraints. They understand that you can't just turn off an industrial control system to apply a security update because the process it controls needs to continue. They understand that the devices in your OT environment may not have standard operating systems or standard security capabilities. They know that many ICS were designed before cybersecurity was a major concern and retrofitting security is a deliberate engineering problem, not just a software installation.
They also understand the convergence trend where OT systems are increasingly networked to IT systems for remote monitoring and management. This creates new security risks because OT networks become targets for attackers while still needing to operate reliably. If someone compromises your IT network and wants to affect production, an insecure connection between IT and OT is their path in. The MSP helps you design secure integration between OT and IT without compromising operational stability.
OT Security Standards Differ From IT Frameworks
Manufacturing facilities, especially critical infrastructure providers and defense contractors, face specific security standards and compliance requirements for their industrial control systems. These include NERC CIP (reliability standards for power industry operators), API standards (for oil and gas), and CMMC (Cybersecurity Maturity Model Certification for defense contractors). Facilities in critical infrastructure sectors face regulatory requirements from CISA or DHS. Medical device manufacturers face specific FDA regulations about control system security. These standards recognize the unique requirements of OT environments and specify expectations different from general IT security frameworks like NIST.
These standards recognize that you can't patch an OT system every week like you patch laptops. They focus more on change management for ICS — changes to control systems risk operational disruption so changes need careful planning, testing, and coordination. They focus less on continuous patching and more on network segmentation because isolating OT networks from the internet reduces risk without requiring constant updates. They focus on resilience and recovery because production continuity is the priority.
A manufacturing MSP, especially one serving regulated sectors, understands these standards. They know which standards apply to your specific facility and manufacturing process. They can map your current OT infrastructure against the requirements and identify gaps. They help you design remediation that meets the standard without breaking production. They maintain documentation and evidence that satisfies compliance audits. They don't try to make your OT system look like business IT. They help you meet the standard using approaches that work for OT.
IT/OT Convergence Creates New Attack Surfaces
Manufacturers increasingly want to integrate OT systems with IT systems for remote monitoring, predictive maintenance, and data analytics. This convergence is smart business — real-time production data can identify bottlenecks before they cause problems, identify equipment failures before they happen, and improve decision-making. But IT/OT convergence also creates security risks that neither pure IT security nor pure OT security fully addresses.
The challenge is fundamental: IT systems are designed to be updated, patched, and changed frequently. OT systems are designed to be stable and rarely changed. Connecting them creates pressure to apply IT security practices to OT systems while needing to maintain OT's operational stability. The integration points become attack surfaces. If someone compromises your IT network and wants to affect production, a poorly secured IT/OT integration is their path in. CISA reported in 2024 that attacks targeting IT/OT convergence points increased 35% year over year, with manufacturing being the most targeted critical infrastructure sector.
A manufacturing MSP helps you design secure integration. This includes network architecture decisions — how to connect OT networks to IT networks safely, whether to use DMZs (demilitarized zones) or other segmentation, how to authenticate communication across the boundary. It includes data flow decisions — what data flows from OT to IT, how to ensure that data moving from OT to IT doesn't carry malicious code, how to ensure that commands from IT to OT are verified before they affect production.
They also help you manage the change management challenges. Changes to OT systems need careful testing and coordination. If you update a PLC and the update causes a production line to miscalibrate, that's a real problem. Changes to IT systems that integrate with OT need to be evaluated for impact on production. A manufacturing MSP establishes procedures that let you benefit from IT system updates and improvements while maintaining OT stability.
Production Continuity Shapes Every Security Decision
In manufacturing, availability is the priority. A web application down for an hour is an incident. A production line down for an hour is lost revenue, missed shipments, and customer impact. This reality shapes security decisions. An MSP supporting manufacturing facilities needs to think about recovery time and understand that "fix it quickly" is a real business requirement, not just a preference.
This affects how you approach disaster recovery and incident response. A manufacturing facility needs production systems back online in minutes, not hours. This means redundancy and failover aren't nice-to-haves — they're operational requirements. It means testing disaster recovery procedures regularly because you can't discover during an actual outage that failover takes three hours when you need it to take three minutes. A manufacturing MSP helps you design redundant systems and regularly test whether you can actually fail over when something fails.
It also affects how you approach security monitoring. Security monitoring generates logs and alerts that consume processing power. On production systems, that processing power competes with real manufacturing work. If monitoring consumes too much processing power, it slows production, and that's unacceptable. An MSP designs monitoring that detects threats without degrading production performance. This might mean monitoring at network boundaries instead of on the production systems themselves, asynchronous log analysis instead of real-time monitoring on critical devices, or sampling data instead of recording everything.
Manufacturing facilities also depend on supply chains — raw materials, components, specialized equipment, software. A manufacturing MSP helps you think about supply chain security from an IT perspective, including evaluating IT systems provided by equipment vendors, ensuring firmware on specialized equipment is legitimate, and managing access by vendors who provide remote support for their equipment.
Defense Contractors Face CMMC Requirements on Top of OT Constraints
If your manufacturing facility works with the U.S. Department of Defense, you face CMMC requirements — Cybersecurity Maturity Model Certification. CMMC combines IT and OT thinking — it requires security controls based on NIST standards but recognizes that contractors face different constraints than commercial organizations. CMMC is assessment-based, meaning you need to be audited by authorized C3PAOs (CMMC Third-Party Assessment Organizations).
A manufacturing MSP familiar with defense contractor work understands CMMC requirements and can help you assess your compliance. They recognize that CMMC level 1 is basic cyber hygiene, level 2 maps to NIST SP 800-171 requirements, and level 3 includes the most sophisticated controls. They help you understand what maturity level your facility needs based on your contracts and the sensitivity of data you handle. They help you implement controls that satisfy CMMC without disrupting production.
They also help you prepare for CMMC assessment. Assessment auditors examine your controls and processes, want documentation and evidence, conduct interviews, and test your security controls. A CMMC-ready MSP helps you organize and document everything auditors look for and understand what evidence you need to demonstrate that controls are actually working.
When you evaluate a manufacturing MSP, don't assume that IT security experience translates to OT security competence. Many IT-focused MSPs cause significant problems when applied to OT environments. Ask them to explain the difference between IT security and OT security. Ask about their experience with industrial control systems — can they name specific PLCs, SCADA systems, or DCS platforms they've worked with? Ask about their experience with OT security standards. Ask how they approach change management for OT systems — if they talk about rapid patching and continuous updates, they don't understand OT constraints. A knowledgeable manufacturing MSP explains that OT changes need careful planning, testing, and coordination, and discusses how to balance security improvements with operational stability. The right MSP will help you improve security while maintaining the operational stability that makes your facility productive.
Frequently Asked Questions
Why can't I just apply standard IT security practices to my manufacturing floor?
Standard IT security assumes systems can be patched frequently, rebooted for updates, and taken offline for maintenance. OT systems controlling manufacturing processes require continuous uptime, real-time responsiveness, and certified software configurations that cannot be changed without risking production disruption, equipment damage, or physical safety hazards. Applying IT security practices directly to OT systems causes the very outages you're trying to prevent.
What is the Purdue Model and why does it matter for manufacturing security?
The Purdue Model is a reference architecture that separates manufacturing networks into hierarchical levels, from physical processes at Level 0 through enterprise IT at Level 5. It provides a framework for network segmentation between IT and OT environments, defining clear boundaries and controlling what traffic can cross between levels. Most OT security standards reference the Purdue Model as the basis for network architecture decisions.
How do I secure legacy OT systems that can't be patched?
The primary approach is compensating controls: network segmentation to isolate the system from internet-facing networks, monitoring at network boundaries to detect unauthorized access attempts, application whitelisting where supported, strict physical access controls, and documented change management procedures. Dragos reported that 72% of OT vulnerabilities in 2024 had no available patch, making compensating controls the standard security strategy rather than an exception.
What CMMC level does my manufacturing facility need?
It depends on the type of information you handle for DoD contracts. If you only handle Federal Contract Information (FCI), Level 1 basic cyber hygiene applies. If you handle Controlled Unclassified Information (CUI), Level 2 is required, which maps to NIST SP 800-171 controls. Level 3 applies to the most sensitive programs. Your contracting officer and the specific contract clauses determine your required level.
How should disaster recovery differ for manufacturing versus office IT?
Manufacturing disaster recovery prioritizes production system availability with recovery time objectives measured in minutes rather than hours. It requires tested failover procedures for production control systems, redundancy for critical manufacturing infrastructure, and the ability to continue production even when IT systems are degraded. Office IT recovery typically allows longer timelines because the business impact of email or file server downtime is less immediate than production line downtime.
What is IT/OT convergence and why is it a security risk?
IT/OT convergence means connecting operational technology systems to business IT networks for data analytics, remote monitoring, and predictive maintenance. While this creates business value, it also creates attack paths from internet-connected IT systems into previously isolated OT environments. CISA reported a 35% increase in attacks targeting IT/OT convergence points in 2024. Secure convergence requires DMZs between networks, validated data flows, and strict access controls at the boundary.