Managed Services
Managed OT Support Services for Multi-Plant Operations
One operating model for the OT network in every plant you run: monitoring from our own read-only appliance, vendor-coordinated patching, an on-call engineer, and a written report every week. Aligned to NIST SP 800-82r3 and ISA/IEC 62443, and proven across a multi-plant cement fleet.
Why plants outgrow ad-hoc OT support
The support model you started with stops scaling around plant three
The patterns below come up in almost every scoping call we run with multi-plant operators. None of them are exotic — they are the predictable consequences of an OT support model that was built for one site and then asked to cover nine.
- 01Incidents don't happen during business hours
- A control network problem at 2 a.m. halts production. The on-call technician doesn't have the industrial background to triage it. By the time someone who does is on the phone, you've lost hours of throughput and a shift supervisor is writing an incident report you'll be answering questions about for a month.
- 02Multi-plant operations outgrow ad-hoc support
- One plant is manageable. Five plants need structure. Nine plants need an operating model. Every site has its own architecture history, its own documentation gaps, and its own definition of 'critical' — and your OT director isn't running security anymore, they're project-managing spreadsheets that never quite match between sites.
- 03Corporate audits keep finding the same gaps
- You already know the firmware on Line 4 is out of date. You already know VLAN-12 at the Phoenix site doesn't match the architecture standard. But the people who can fix those things are the same people keeping production running — so the remediation ticket sits in the backlog until the next audit reopens it.
How Potenza manages OT across multiple plants
One operating model across every site, every shift
Managed OT support is a services engagement, not a product. Potenza brings continuous monitoring, standards-aligned architecture, and a human-led response model under a single operating framework — so the same triage process, reporting cadence, and SLA definitions apply at every plant.
- 01Continuous monitoring across your OT network
- PortGuard OT, a read-only monitoring appliance we build ourselves, sits in each plant and watches its switches and firewalls. Alarms reach our engineers first and route into one triage process across every plant, not a different console for every site and a different definition of 'critical' at each one.
- 02Aligned to NIST SP 800-82r3 and ISA/IEC 62443
- Purdue Model architecture (Levels 0–5), IT/OT network segmentation with DMZ and Industrial Zones, Zero Trust principles, CVE/NVD-based vulnerability management, and vendor-coordinated patch management. Standards alignment is a structural property of the engagement, not a checkbox at audit time.
- 03An engineer on call, and every activity recorded
- Critical incidents route to an engineer with hands-on OT experience, against a response target written into your contract. Every activity is logged as a planned service or an incident, with severity and status, and every closed incident carries a root cause analysis. Coverage hours are agreed per plant.
What a managed OT engagement includes
Outcomes, on a predictable cadence
Every engagement produces the same core artifacts on the same schedule — so your audit team, your cyber-insurance renewal, and your board all see the same story without you assembling it by hand.
- Activity summary every Monday
- Structured log of remote troubleshooting tickets by severity and plant, configuration changes, firmware and security updates, proactive maintenance, and any equipment alerts investigated during the prior week.
- Network performance report
- Delivered within 10 business days of month-end. Covers network behavior, bottlenecks, peak load periods, link utilization trends, issue resolution log by severity and plant, and the full update & maintenance log for the month.
- Strategic assessment
- Delivered by April 15, July 15, October 15, and January 15. Covers Critical and High severity incidents, trend analysis, emerging risks, vendor escalations, and a forward-looking roadmap for the next quarter.
- Documentation refresh
- Delivered by July 15 and January 15. Updated network equipment inventory, server and IT asset inventory, topology diagrams (logical and physical, VLANs, routing, security zones), and IP addressing schemes by plant.
- Vendor-coordinated patching
- Firmware and security updates scheduled around your production calendar and coordinated with the equipment vendors themselves — so your team isn't the one negotiating compatibility matrices during a maintenance window.
- 24-month document retention
- Every report, diagram, and incident summary kept on file for a minimum of 24 months, available without delay for audit and trend analysis purposes.
Weekly
Monthly
Quarterly
Semi-annual
Ongoing
Retained
FAQ
Questions operators ask before signing a managed OT contract
Still deciding whether managed OT support is the right model for your environment? Reach out to our team.
Continuous network monitoring, response to network incidents against a contracted target, vendor-coordinated patch and antivirus management, CVE/NVD-based vulnerability management, and structured reporting on a weekly, monthly, quarterly, and semi-annual cadence. It also covers the planned work: switch hardening, configuration backups, secure remote access, and migrations off legacy fieldbus networks.
OT uptime requirements aren't the same as IT. A reboot that's fine for an email server can halt a production line or create a safety event. Potenza designs every change around plant operations — production windows, shift handoffs, and control loop stability — before touching a device.
Potenza runs every engagement through its four-phase Defense-in-Depth framework — Assess & Design, Engineering & Implementation, Operation, and Optimization — aligned to NIST SP 800-82r3 and ISA/IEC 62443. Work maps across plant security, network security, and system integrity, with Zero Trust principles embedded throughout.
Managed industrial switches and firewalls from any vendor, plus the servers that host OT applications, in plants running EtherNet/IP, Profinet, and Modbus. The monitoring appliance is read-only and vendor-agnostic, so it does not depend on one manufacturer's tooling.
Across a multi-year engagement with a multi-plant cement operator in the USA, Potenza delivered a layered Purdue-based architecture with monitoring, switch hardening, and IT/OT segmentation. OT network incidents dropped markedly, hundreds of service activities a year are completed without stopping production, and every plant in the fleet receives a weekly report.
Critical incidents go straight to the on-call engineer, against a response target written into your contract. Every critical incident closes with a documented root cause analysis. Standard incidents route under the weekly cadence. Coverage hours are agreed before the service starts.
Related reading
From the blog
SIEM vs. SOC in OT: Why the Distinction Decides Your Industrial Risk
A SIEM is a technology; a SOC is a function. Learn why confusing the two creates real risk in industrial OT environments, and what operators should demand instead.
The Purdue Model in Practice: What OT Network Segmentation Actually Looks Like on a Plant Floor
Everyone references the Purdue Model. Few organizations implement it the way the standard intends. Here's what each level actually contains in a working industrial environment — and where most segmentation projects go wrong.
IT vs OT Security: Why Your Enterprise Firewall Isn't Enough
Most industrial operators assume the security stack that protects the corporate network will extend naturally to the plant floor. It won't — and the assumptions behind enterprise security are the exact reason it fails in OT environments.
Go deeper
This service, by industry
Cement
Managed OT Services for Cement Plants
Incident response and planned services timed to kiln outages, one model across the fleet.
Mining
Managed OT Services for Mining Operations
Remote-first response with a defined path for unreachable sites and legacy spares.
Aggregates & Ready-Mix
Managed OT Services for Aggregates & Ready-Mix
One point of contact across dozens of small plants, sized for batch hours and seasonal sites.
Our Services
Explore our OT services
- 01
Topology Assessment
A site survey that documents what is on your OT network, how it connects, and where it falls short of the target architecture. Engineers walk the plant, observe passively, and change nothing. Scoped per plant, delivered to a named owner on your team.
- 02
Topology Authority
Continuous topology authority for your OT environment — not a point-in-time pen test, not an annual vulnerability scan. The operator's source of truth for what is on the network and how it connects.
- 03
OT Service Owner
Operational extension of the customer's OT team. ITIL-aligned governance, ongoing service ownership across multi-plant fleets. The OT Service Owner cannot be the OT Vendor — structural independence is the operating principle.
- 04
OT Network Monitoring
Continuous visibility across your OT network from a monitoring appliance inside the plant. PortGuard OT, built by Potenza, reads your switches and firewalls without ever writing to them, keeps working with no internet connection, and alerts our engineers first.
Get Started
Ready to offload day-to-day OT support?
Tell us how many plants you run, what monitoring and network infrastructure is already in place, and what your current response model looks like. We'll come back with a scoping proposal — not a sales deck.
What you'll get
- On-call engineer with a contracted response target
- Continuous monitoring from our own read-only appliance in each plant
- Aligned to NIST SP 800-82r3 and ISA/IEC 62443
- Weekly, monthly, quarterly, and semi-annual reporting cadence
- Vendor-coordinated patching scheduled around production windows
Prefer email? helpdesk@potenzaservices.com