Services / Consulting & Implementation
OT Security · Assessment
See every asset and connection on your plant network
An OT security assessment for industrial sites: asset discovery, network architecture review and risk assessment aligned to ISA/IEC 62443, without disrupting production.
Map the plant before you protect it
Safe, passive discovery builds an accurate picture of every controller, server and connection.
The first control in any plant is an accurate map of what is connected.
Dr. Sanjay Vaid, Invocore
You cannot protect what you cannot see
Many plants have grown over decades, with controllers, servers and remote connections added by different vendors. An OT security assessment builds an accurate picture of what is connected, how it is protected and where the biggest risks sit.
The challenge
Why this matters now
Industrial sites often lack a reliable inventory of their control systems. Vendors connect remotely, flat networks link IT and OT, and legacy systems cannot be patched. Without visibility, it is impossible to know where the real risks lie.
Our OT security assessment builds that visibility safely. We work with operations teams to discover assets, review architecture and remote access, and assess risk using ISA/IEC 62443, producing a phased roadmap that respects safety and production.
IT and OT convergence
Plant networks increasingly connect to corporate IT and the cloud.
Attacks on industry
Industrial organisations are frequent targets of ransomware and disruption.
Customer and regulator pressure
Operators and OEM customers expect evidence of OT security.
Quick self-check
How ready are you?
Answer four questions leaders ask us. Your result appears instantly; nothing is stored or sent.
Do we have a current inventory of every OT asset?
How do vendors and engineers connect remotely?
Is the plant network separated from corporate IT?
Which zones carry the highest risk to safety and production?
What we deliver
Capabilities
OT asset discovery
A register of controllers, HMIs, servers and network devices across the site.
Architecture review
Segmentation, DMZ, firewalls and remote access assessed against the Purdue model.
Risk assessment (62443-3-2)
Threats, consequences and target security levels for each zone.
Remote access and vendor review
How engineers and vendors connect, and how that access is controlled.
Policy and procedure review
OT security policies, change control and backups.
Prioritised roadmap
Practical, phased actions that fit maintenance windows.
Interactive
Explore the framework
Select any part of the diagram to see what it covers.
Selected
Enterprise IT
Business networks and systems such as ERP and email. Under 62443 they sit outside the control zones and connect only through the DMZ.
Industrial DMZ
A buffer zone between IT and OT. Firewalls, jump hosts and data replicas mean no direct traffic passes between business and control networks.
Operations
Site-level systems such as historians, MES and patch servers that collect data and manage production.
Supervisory
SCADA servers, HMIs and engineering workstations that monitor and command the process. A frequent target, so access is tightly controlled.
Control
PLCs, DCS controllers and RTUs that run the process logic in real time. Changes here need strict authorisation.
Field devices
Sensors, actuators and drives that measure and act on the physical process. Their integrity is essential to safety.
Our approach
How we work with you
A clear, staged path from first assessment to lasting capability.
Step 1
Scope
Sites, systems and safety constraints
Step 2
Discover
Assets and connections
Step 3
Assess
Architecture and controls
Step 4
Analyse
Risk and security levels
Step 5
Plan
Phased remediation roadmap
Why Invocore
What sets us apart
Senior, practitioner-led advice that holds up in front of auditors, boards and customers.
Safety first
Assessment methods planned around production and safety constraints.
Standards-based
Aligned to ISA/IEC 62443 risk assessment and system requirements.
From findings to action
Roadmaps phased to fit maintenance windows and budgets.
Engagement models
Start where you are
Begin with a focused first step and expand as value is proven.
Single-site assessment
One plant or system assessed in depth.
Fees on enquiry
Multi-site assessment
A consistent assessment across several sites with a group view.
Fees on enquiry
Programme support
Implementation support and periodic reassessment.
Fees on enquiry
Deliverables
What you receive
- OT asset and connection register
- Network architecture diagram and review
- Remote access assessment
- Risk assessment to ISA/IEC 62443-3-2
- Findings and recommendations report
- Phased remediation roadmap
Outcomes
What changes for you
- A complete OT asset and connection register
- A clear view of architecture and remote access risk
- Risk-based priorities aligned to ISA/IEC 62443
- A phased roadmap that fits maintenance windows
Who we work with: Energy and utilities, Oil and gas, Manufacturing, Pharma, Water and wastewater and System integrators.
Frequently asked questions
Will the assessment affect production?
We plan with operations teams and use passive methods wherever possible.
Do you follow ISA/IEC 62443?
Yes. Risk assessment and architecture review follow ISA/IEC 62443-3-2 and 3-3.
What happens after the assessment?
We can help implement the roadmap through our ISA/IEC 62443 consulting and training.
Get in touch
Discuss your requirement
Tell us about your organisation and goals. A senior consultant will reply, usually within one working day.
Prefer to talk now? WhatsApp +91 98108 17659 or info@invocore.org
