// services
OT cybersecurity consulting for plant operators
Our consultants assess your plants, design the OT security program, and work on your sites until it runs. We score against NIST CSF 2.0, NIST SP 800-82, and IEC 62443, and we tie every finding to production impact. Stepan Company is a customer.
// who does the work
Senior practitioners run every engagement
Our practitioners spent decades in OT and product security inside Siemens, Rockwell Automation, and Fortune 100 operators. We are vendor-agnostic, so no reseller fee sits behind a recommendation.
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Engagement lead
A senior OT security practitioner who owns scope, runs the leadership interviews, and delivers the executive briefing.
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Lead assessor
Walks the plant and tests controls against IEC 62443 and NIST SP 800-82, on your outage and shift schedule.
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Security engineer and architect
Designs zones, conduits, the IDMZ, and identity controls, then stays through the build.
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Analyst
Reconciles asset, firewall, and directory evidence offline and writes the findings register.
Need a practitioner inside your own team? We put forward two or three named candidates for the role, and you choose. See OT cyber staff augmentation.
See how each engagement runs// where clients start
Assessments
What a plant OT risk assessment should produce
IEC 62443-3-2 high-level assessment in three weeks. Zones, conduits, and the exposures worth funding this year, named in plant language.
Rank plant work zone by zone under IEC 62443-3-2
Zone-by-zone IEC 62443-3-2 detail for loss of view and loss of control. Ranked work a CapEx decision can use, with a costed roadmap.
How mature is your OT security program?
Score the OT program against IEC 62443 and NIST CSF. See what exists, what is missing, and what to fund next. Baseline in about six weeks.
Does this plant OT architecture hold?
Zones, conduits, and remote access reviewed against IEC 62443-3-3. You leave knowing which paths would take a line down.
Can this plant recover from ransomware?
Backup, restore, and decision rights tested against a plant outage. You leave with the gaps that would stop production, ranked for this budget.
Hillstrong serviceWhere IT/OT boundary risk sits this week
Passive capture of real IT/OT traffic for two to four weeks. Modbus, EtherNet/IP, OPC UA, and S7. Findings ranked by what they put at risk in production.
Know what is on the plant network before you touch it
A defensible OT asset inventory and network map built from passive, offline evidence. Plant teams approve every method before anything runs.
Assessment Technology
Collect from a live HMI without affecting the operator
Sensory collects asset and configuration data from live OT Windows hosts with a 5 percent CPU cap, no network traffic, and one output file on USB.
Read the plant network without touching it
Passive SPAN capture turned into a device inventory, flow matrix, and boundary audit. About 81 industrial protocols parsed offline, nothing installed.
Turn a ten-year firewall ruleset into a cleanup work order
Offline analysis of plant firewall configs and logs across Palo Alto, Fortinet, ASA, and Check Point. Every finding names the rule index to fix.
Map the domain trust path an attacker would take into the plant
A signed, read-only script your domain admin runs maps the trust path from enterprise AD into OT. No password hashes collected, no writes, no agent.
Advisory & Program
Design an OT security program you can run
Charter, RACI, and site-tiered work from the assessments you already paid for. Hillstrong writes the program documents your plants will run on.
Turn OT policy into site-owned work
Hillstrong gives each OT policy an owner, a site, and a close date, then collects the evidence as the work closes. The governance pack stays current.
OT vulnerability management without a patching fantasy
Rank OT vulnerabilities by plant consequence, with compensating controls and change windows. A program your plants can run this year.
Vendor access with an owner and an expiry
Remote vendor access gets an owner, a window, and an expiry. Hillstrong builds the program. Proof lands as access is granted and pulled.
OT cyber advice a CISO can take to the board
A senior OT practitioner briefs the CISO on program status, material risk, and the next funded move, and stays on call when the hard decisions land.
Pick OT security tools without buying a second program
Hillstrong sets your requirements, scores a shortlist of OT security tools, and writes the decision record. We take no reseller fees from any vendor.
Resilience & Response
OT incident response you can rehearse
Plant IR plan with roles, decision rights, and a tabletop against a real scenario. Gaps become tasks. Evidence is the after-action.
OT disaster recovery that matches the plant
Restore paths, RTO, and who can take the plant down on purpose, written for the operations team that runs the recovery and proven in a live restore test.
Managed Services
Watch the plant without pretending monitoring is the program
Passive OT monitoring at the IT/OT boundary, with 24/7 detection ranked by what each alert could do to production. If you use Resilion, alerts land there as tasks.
Stand up an OT security function, then hand it over
Hillstrong staffs the OT security function, runs it under SLAs, and transfers it to your team on a date the contract names.
Staffing & Training
OT security people on your sites, on your charter
Senior practitioners you interview and select, on your sites under your program charter. The documentation stays in your stack when the engagement ends.
OT security training operators will sit through
Training built for operators and technicians: site rules, vendor access, and what to do when the HMI looks wrong. Every module is role-based.
// FAQ
Questions plant operators ask
- What OT cybersecurity services does Hillstrong provide?
- Hillstrong designs industrial security programs and runs them on your sites. The catalog covers IEC 62443 and NIST CSF assessments, program design, incident response, monitoring, and staff on the ground. Findings become tasks in Resilion.
- What happens after an OT security assessment?
- The report lists gaps. Hillstrong assigns owners, tiers the work by site, and keeps proof as each task closes. Resilion is the system that keeps that work moving across the fleet.
- Which service should a plant start with?
- Most plants start with a high-level IEC 62443-3-2 risk assessment or an OT security program maturity assessment. Those give leadership a fundable first move.
- How do the services relate to Resilion?
- Our consultants do the assessment, design, and on-site work. Resilion is the platform we use to keep the findings moving after the report: each fix gets an owner, and the evidence lands as it closes. You can use the services without it.
Talk to the people who do the work
Thirty minutes with a senior OT security practitioner. We confirm fit, plant scope, and who should be in the room. If it is not a match, we say so.