OT/ICS/SCADA Security Services India | Industrial Cybersecurity
Protect your industrial control systems, SCADA networks, and operational technology from cyber threats. P.J. Networks delivers specialised OT cybersecurity for Indian manufacturing, energy, and critical infrastructure.
Industrial control systems, SCADA networks, and operational technology (OT) are the backbone of India’s critical infrastructure — power grids, oil refineries, chemical plants, water treatment facilities, manufacturing lines, and transportation systems. These systems control physical processes that directly impact public safety, economic output, and national security. Yet in survey after survey, OT environments remain woefully under-secured.
The convergence of IT and OT networks has created unprecedented security challenges. While IT-OT integration delivers significant operational benefits — real-time production data, predictive maintenance, centralised monitoring — it also exposes previously air-gapped industrial systems to cyber threats. The Colonial Pipeline, Oldsmar water treatment, and Ukraine power grid attacks are stark reminders that OT systems are now prime targets for cyber attackers, including nation-state actors.
At P.J. Networks, we deliver specialised OT/ICS/SCADA security services designed for the unique demands of industrial environments. With 15+ years of industrial cybersecurity experience, we understand that safety and availability are paramount — a poorly designed security control that disrupts production is worse than no security at all. Our OT security team combines deep cybersecurity expertise with hands-on industrial control systems knowledge, including experience with Siemens, Rockwell, Schneider Electric, ABB, GE, Honeywell, and Yokogawa platforms.
Our approach is grounded in the ISA/IEC 62443 framework and aligned with Indian regulatory requirements from NCIIPC, CERT-In, and sector-specific regulators. We begin with passive discovery and assessment, design zero-trust architectures following the Purdue model, implement OT-specific controls that don’t disrupt operations, and provide 24×7 monitoring through our dedicated OT SOC.
The stakes are higher in OT security — it’s not just about data breaches or financial loss, but about safety, environmental impact, and national security. A cyber attack on a power grid can leave millions without electricity. An attack on a chemical plant can cause toxic releases. At P.J. Networks, we take that responsibility seriously. Every OT security engagement is executed with the understanding that our work directly impacts the safety and reliability of India’s critical industrial infrastructure.
Whether you operate a small manufacturing plant or a nationwide SCADA network managing critical national infrastructure, P.J. Networks delivers OT security solutions tailored to your risk profile, operational constraints, and regulatory obligations.
Key Features & Capabilities
OT Security Assessment
Comprehensive security assessment of industrial control system environments including Purdue model architecture review, network segmentation analysis, asset inventory, vulnerability assessment of PLCs, RTUs, HMIs, and historians, and OT-specific risk assessment.
Purdue Model Segmentation
Network segmentation aligned with the Purdue Enterprise Reference Architecture (ISA-95). Level 0-4 separation with industrial firewalls, one-way diodes, and data diodes ensuring OT network isolation from IT and internet-facing systems.
Industrial Firewall & IDS/IPS
Deployment of OT-specific firewalls (Fortinet, Palo Alto, Cisco ISA 3000) with industrial protocol inspection. OT-IDS/IPS with Modbus, DNP3, IEC 61850, OPC, and Profinet deep packet inspection. Anomaly detection for industrial protocols.
OT Vulnerability Management
Specialised vulnerability scanning for industrial control systems without disrupting operations. Passive asset discovery, credentialed scans during maintenance windows, vulnerability prioritisation using CVSS with OT-specific scoring considerations for safety and availability.
OT SOC & Monitoring
24×7 dedicated OT security operations centre with industrial protocol behavioural analytics. Baselining of normal OT traffic patterns, anomaly detection, correlation of IT and OT security events, and OT-specific incident response playbooks.
OT Patch Management
Vendor-coordinated patching strategies for industrial systems where traditional patching may cause compatibility issues or require extensive revalidation. Virtual patching via IDS/IPS for systems that cannot be patched immediately.
Remote Access Security
Secure remote access solutions for OT vendors, engineers, and support teams. Jump box architecture with session recording, multi-factor authentication, time-limited access, and detailed audit logging of all OT remote sessions.
OT Compliance & Standards
Compliance assessment and implementation for ISA/IEC 62443, NIST SP 800-82, NCIIPC guidelines, CERT-In OT directives, and sector-specific regulations for power, oil & gas, water, and manufacturing sectors.
SCADA Application Security
Security review of SCADA applications, HMI software, historians, and engineering workstations. Hardening guides for common SCADA platforms including Wonderware, Siemens PCS 7, Rockwell, ABB, GE, and Honeywell.
OT Incident Response
Specialised OT incident response capabilities that consider safety implications. Full incident response lifecycle from preparation and detection through containment, eradication, and recovery — executed with zero tolerance for safety impact.
OT Penetration Testing
OT-specific penetration testing conducted in designated test environments or during planned outages. Testing covers PLC/RTU exploitation, protocol fuzzing, man-in-the-middle attacks on industrial protocols, and OT network segmentation bypass.
OT Security Awareness Training
Specialised cybersecurity awareness training for OT engineers and operators covering social engineering risks, removable media hygiene, incident reporting, and safe practices for engineering workstation and HMI usage.
Our Engagement Process
1 OT Asset Discovery & Baseline
We deploy passive and active OT discovery tools to create a comprehensive inventory of all industrial assets including PLCs, RTUs, HMIs, historians, engineering workstations, and network devices. This provides the foundational visibility needed for all subsequent security activities.
2 OT Security Assessment & Gap Analysis
A detailed assessment of your OT environment against ISA/IEC 62443, NIST SP 800-82, and industry best practices. We evaluate network segmentation, access controls, patch management, remote access, incident response capabilities, and physical security of OT environments.
3 Architecture Design & Segmentation
We design OT network architecture following the Purdue model, implementing firewall zones between IT and OT (Level 3-4 boundary), between OT zones (Level 2-3), and between control and safety systems. One-way data diodes enable safe data extraction for monitoring.
4 Implementation & Deployment
Security controls are deployed in OT environments using rigorous change management processes. Industrial firewalls, OT-IDS/IPS sensors, secure remote access solutions, and monitoring agents are installed with zero impact on production operations.
5 Testing & Validation
All security controls are validated without disrupting operations. We verify segmentation rules, test IDS detections with benign traffic, validate remote access controls, confirm monitoring coverage, and document security control effectiveness.
6 Managed OT SOC & Continuous Improvement
Post-deployment, we provide 24×7 OT SOC monitoring with industrial protocol analytics, quarterly security assessments, annual penetration testing, patch management coordination with vendors, and continuous improvement based on threat intelligence and operational changes.
Frequently Asked Questions
OT security prioritises safety and availability above all else — availability of industrial processes is non-negotiable. Traditional IT security tools (scanners, patching, endpoint protection) can disrupt OT operations if not carefully designed. OT environments have legacy systems spanning decades, proprietary protocols (Modbus, DNP3, OPC, Profinet), limited vendor security support, and years-long patching cycles requiring extensive revalidation.
Absolutely. IT-OT network segregation is the single most important OT security control. The Purdue model (ISA-95) defines clear levels (0-4) for industrial processes, and security boundaries must exist between IT and OT networks. Failure to segregate is the primary cause of OT security incidents — in 2023, 45% of OT organisations reported IT-to-OT breach propagation according to SANS.
Yes. Our OT assessments use passive discovery techniques that do not send any active probes to control system devices. We use network traffic analysis to identify assets and potential vulnerabilities. When active scanning is required, it is scheduled during planned maintenance windows and validated on test systems first.
We support all major industrial protocols including Modbus TCP/RTU, DNP3, IEC 61850, IEC 60870-5-104, OPC (DA, HDA, UA), Profinet, Profibus, EtherNet/IP, CIP, S7comm, BACnet, MQTT, and vendor-specific protocols used by Siemens, Rockwell, Schneider, ABB, GE, Honeywell, and Yokogawa systems.
We implement secure jump host architectures with multi-factor authentication, session recording, time-limited access tokens, and detailed audit logging. Vendors can only access their specific systems through the jump host, never directly from the internet. This is critical because OT vendors requiring remote access are often the weakest link in OT security.
Several frameworks apply: ISA/IEC 62443 (international OT security standard), NIST SP 800-82 (OT security guide), NCIIPC guidelines for critical information infrastructure, CERT-In OT security directives, and sector-specific regulations from Ministry of Power (grid codes), Petroleum & Natural Gas Regulatory Board, and Ministry of Electronics & IT.
The Growing Threat to Industrial Cybersecurity in India
India’s critical infrastructure — power generation and distribution, oil and gas pipelines, water treatment plants, chemical manufacturing, pharmaceutical production, and transportation systems — relies on industrial control systems (ICS) and supervisory control and data acquisition (SCADA) networks. These systems were traditionally air-gapped from corporate IT networks and the internet, relying on physical isolation for security. However, the drive toward Industry 4.0, smart manufacturing, and operational efficiency has connected OT systems to IT networks and, increasingly, to the internet.
This convergence has created a fundamentally new risk landscape for Indian industrial organisations. The 2023 Dragos ICS Risk & Vulnerability Report documented a 27% increase in vulnerabilities affecting ICS devices, with nation-state actors increasingly targeting industrial control systems for geopolitical advantage. For Indian organisations operating critical infrastructure, the threat is particularly acute given India’s strategic position and the increasing frequency of cyber attacks targeting the country’s essential services.
The consequences of OT security failures extend far beyond data breaches. A compromised industrial control system can lead to physical damage to equipment, environmental disasters, production stoppages costing crores per day, and, in the worst cases, loss of life. The 2020 Oldsmar water treatment attack in Florida, where an attacker attempted to increase sodium hydroxide levels to dangerous concentrations, demonstrates the potentially catastrophic safety implications of OT security failures.
Secure Your Industrial Control Systems Today
Call us today for a free consultation and discover how P.J. Networks can secure your business.