OT / Industrial Cybersecurity Assessment
OT cybersecurity assessment for safer improvement planning
Give plant and security leaders a clearer view of operational-technology risk. A scoped review of architecture, access and remote connectivity connects OT findings to improvement priorities while keeping safety and uptime central.
MIS
CISSP
CHISL
CPHIMS
CDH-E
Will Long Sr. · Founder
MIS · CHISL · CDH-E · CISSP · CPHIMS
Nearly 40 years in IT & cybersecurity
Former VP & CISO, Children’s Health System of Texas
Tim Pelikan · Co-Founder
Credential details pending confirmation
30 years in cybersecurity & data risk
Interviews & industry conversations
Coffee With Closers
Cybersecurity With Discern
“ICA provides distinctive security professionals who excel at building strong client relationships, demonstrate exceptional organization, and deliver practical, risk-based consulting recommendations to our clients.”
Michael Cox, CIPP/US
Chief Privacy Consultant & Founder, SoCal Privacy Consultants
Partner endorsement of ICA’s advisory work
Make security decisions around production needs
Connecting plant systems to enterprise IT can change who has access to operations and how that access is controlled. Remote vendor support adds another set of connections to understand. Plant leadership needs to decide which weaknesses deserve attention without treating every production asset like an office computer.
This assessment is intended for OT managers, operations directors and CISOs facing IT/OT convergence or operational resilience concerns. The business decision is where to focus security work while respecting the constraints of the process being controlled.
Define the OT environment and its connections
Coverage centers on operational-technology architecture, access, remote connectivity and security practices. The agreed boundary identifies the systems and sites under review, including relevant vendor relationships.
Architecture review considers documented boundaries and connections used to operate or support production. Access review examines how personnel and vendors receive access, how privileges are controlled and how remote sessions are governed. Existing security practices are considered in the context of plant operations. A review of one site or selected systems should be understood within that boundary, rather than treated as coverage of every facility.
Use evidence and approved non-disruptive methods
The engagement is scoped as a specialist-led review using approved non-disruptive methods. Discussions with control-system owners and security staff establish how the environment operates. Relevant evidence may include architecture diagrams, asset records, access procedures and documentation of vendor connections.
Where agreed, existing configuration exports can help compare documented practices with the available evidence. Interviews explain operational constraints; records support the findings. Missing or outdated evidence is identified rather than replaced with an assumption that a safeguard works.
This approach does not authorize vulnerability scanning or penetration testing. Active scanning or testing of production control systems requires explicit safety approval, written authorization and separately agreed rules of engagement.
Turn observations into OT improvement priorities
The scope defines the depth of three typical deliverables:
OT risk findings. Document identified concerns about access, connectivity and security practices. Plant and security leaders can use these findings to discuss operational consequences and decide which concerns need attention.
Architecture observations. Explain relevant connections and boundary issues found in the reviewed evidence. These observations give engineering and IT owners a common reference for discussing changes.
Prioritized improvement roadmap. Sequence recommended improvements for planning. Owners can compare security priorities with operational constraints before deciding what to implement.
The outputs should make their evidence basis and coverage clear. Recommendations support decisions; they do not prove implementation or resilience against attacks.
Prepare the people and evidence for a focused review
Scoping starts with the operational concern and the systems involved. Site count, vendor complexity, evidence quality and the permitted review methods affect effort, cost and timing. The review also depends on confirming appropriate OT specialist capability for the environment.
Identify participants who understand production requirements and access arrangements. Plant engineering and operations need to help explain which activities could affect the process. Security and IT owners contribute the evidence for connected systems.
Prepare available diagrams and system inventories alongside access procedures and relevant vendor documentation. Agree evidence handling and any access permissions before review begins. Incomplete documentation limits the conclusions and may change review depth.
Keep assessment boundaries visible
Safety and uptime guide the scope and method selection; they are not guaranteed outcomes. Production control systems are excluded from active scanning or testing unless explicitly approved for safety and separately authorized. Intrusive changes to safety-critical systems are outside the default review.
The roadmap recommends improvements. Configuration changes, remediation execution and ongoing monitoring require separate agreement. A general network or firewall assessment has a different focus and should not be assumed to cover industrial-process constraints. Likewise, an OT evidence review does not establish that backups are recoverable or replace a separately scoped continuity review. Choose the assessment around the decision your operations team needs to make.
OT assessment questions
Who should consider this assessment?
Plant leadership, OT managers and CISOs should consider it when IT/OT connections or remote vendor access raise questions about operational cyber risk. The scope needs both security input and an understanding of the process being controlled.
Can the review cover several plants?
Multiple sites can be considered during scoping. Coverage depends on the selected systems, differences between sites and vendor arrangements. The engagement must state which environments are reviewed and which remain outside its conclusions.
Will the assessment scan our production systems?
The intended approach uses approved non-disruptive review methods. Production scanning and active testing require explicit safety approval and separate written authorization. An evidence review alone does not establish whether a weakness is exploitable.
What determines cost and timing?
The main factors are the systems and sites involved, vendor connections, evidence availability and permitted methods. Access to knowledgeable operational staff also matters. Relevant specialist capability and the package scope need confirmation before commitments are made.
How does this differ from a network segmentation assessment?
This review places architecture and access concerns in an operational-technology context, with safety and uptime prioritized. A network, firewall and segmentation assessment concentrates on its agreed network controls. Any combined coverage must be defined explicitly.
Does the roadmap include implementing the recommendations?
The roadmap is a planning output alongside OT risk findings and architecture observations. Implementation, retesting and operational support are outside the default assessment. Your owners decide how to proceed under their engineering and change-approval processes.
Plan the next OT security decision
Bring your operational concern into a scope discussion that accounts for production requirements. Agree the systems and review boundaries that matter. OT risk findings and a prioritized roadmap can give plant and security leaders a clearer basis for deciding what deserves attention next.
Make security decisions around production needs
Connecting plant systems to enterprise IT can change who has access to operations and how that access is controlled. Remote vendor support adds another set of connections to understand. Plant leadership needs to decide which weaknesses deserve attention without treating every production asset like an office computer.
This assessment is intended for OT managers, operations directors and CISOs facing IT/OT convergence or operational resilience concerns. The business decision is where to focus security work while respecting the constraints of the process being controlled.
Define the OT environment and its connections
Coverage centers on operational-technology architecture, access, remote connectivity and security practices. The agreed boundary identifies the systems and sites under review, including relevant vendor relationships.
Architecture review considers documented boundaries and connections used to operate or support production. Access review examines how personnel and vendors receive access, how privileges are controlled and how remote sessions are governed. Existing security practices are considered in the context of plant operations. A review of one site or selected systems should be understood within that boundary, rather than treated as coverage of every facility.
Use evidence and approved non-disruptive methods
The engagement is scoped as a specialist-led review using approved non-disruptive methods. Discussions with control-system owners and security staff establish how the environment operates. Relevant evidence may include architecture diagrams, asset records, access procedures and documentation of vendor connections.
Where agreed, existing configuration exports can help compare documented practices with the available evidence. Interviews explain operational constraints; records support the findings. Missing or outdated evidence is identified rather than replaced with an assumption that a safeguard works.
This approach does not authorize vulnerability scanning or penetration testing. Active scanning or testing of production control systems requires explicit safety approval, written authorization and separately agreed rules of engagement.
Turn observations into OT improvement priorities
The scope defines the depth of three typical deliverables:
OT risk findings. Document identified concerns about access, connectivity and security practices. Plant and security leaders can use these findings to discuss operational consequences and decide which concerns need attention.
Architecture observations. Explain relevant connections and boundary issues found in the reviewed evidence. These observations give engineering and IT owners a common reference for discussing changes.
Prioritized improvement roadmap. Sequence recommended improvements for planning. Owners can compare security priorities with operational constraints before deciding what to implement.
The outputs should make their evidence basis and coverage clear. Recommendations support decisions; they do not prove implementation or resilience against attacks.
Prepare the people and evidence for a focused review
Scoping starts with the operational concern and the systems involved. Site count, vendor complexity, evidence quality and the permitted review methods affect effort, cost and timing. The review also depends on confirming appropriate OT specialist capability for the environment.
Identify participants who understand production requirements and access arrangements. Plant engineering and operations need to help explain which activities could affect the process. Security and IT owners contribute the evidence for connected systems.
Prepare available diagrams and system inventories alongside access procedures and relevant vendor documentation. Agree evidence handling and any access permissions before review begins. Incomplete documentation limits the conclusions and may change review depth.
Keep assessment boundaries visible
Safety and uptime guide the scope and method selection; they are not guaranteed outcomes. Production control systems are excluded from active scanning or testing unless explicitly approved for safety and separately authorized. Intrusive changes to safety-critical systems are outside the default review.
The roadmap recommends improvements. Configuration changes, remediation execution and ongoing monitoring require separate agreement. A general network or firewall assessment has a different focus and should not be assumed to cover industrial-process constraints. Likewise, an OT evidence review does not establish that backups are recoverable or replace a separately scoped continuity review. Choose the assessment around the decision your operations team needs to make.
OT assessment questions
Who should consider this assessment?
Plant leadership, OT managers and CISOs should consider it when IT/OT connections or remote vendor access raise questions about operational cyber risk. The scope needs both security input and an understanding of the process being controlled.
Can the review cover several plants?
Multiple sites can be considered during scoping. Coverage depends on the selected systems, differences between sites and vendor arrangements. The engagement must state which environments are reviewed and which remain outside its conclusions.
Will the assessment scan our production systems?
The intended approach uses approved non-disruptive review methods. Production scanning and active testing require explicit safety approval and separate written authorization. An evidence review alone does not establish whether a weakness is exploitable.
What determines cost and timing?
The main factors are the systems and sites involved, vendor connections, evidence availability and permitted methods. Access to knowledgeable operational staff also matters. Relevant specialist capability and the package scope need confirmation before commitments are made.
How does this differ from a network segmentation assessment?
This review places architecture and access concerns in an operational-technology context, with safety and uptime prioritized. A network, firewall and segmentation assessment concentrates on its agreed network controls. Any combined coverage must be defined explicitly.
Does the roadmap include implementing the recommendations?
The roadmap is a planning output alongside OT risk findings and architecture observations. Implementation, retesting and operational support are outside the default assessment. Your owners decide how to proceed under their engineering and change-approval processes.
Plan the next OT security decision
Bring your operational concern into a scope discussion that accounts for production requirements. Agree the systems and review boundaries that matter. OT risk findings and a prioritized roadmap can give plant and security leaders a clearer basis for deciding what deserves attention next.