Purpose/Objective

Lead OT Cybersecurity Engineer will spearhead the design, implementation and operations of cybersecurity controls across OT/ICS environments. This role acts as the technical authority for securing industrial automation systems, ensuring visibility, resilience, compliance and threat protection across plants and manufacturing operations. The position requires close collaboration with Plant Engineering, OEM vendors, IT Security teams, Cybersecurity team and SOC to strengthen OT cyber maturity, implement secure architectures and drive incident response readiness aligned with global standards (IEC 62443, NIST 800 82, ISO 27001, etc).

Key Responsibilities of Role

Key Responsibilities: • Design and implement OT network segmentation based on the Purdue Model, including DMZs, industrial firewalls, and secure remote access architectures. • Deploy and manage RBAC, MFA, jump servers, and vendor access solutions with session monitoring and recording. • Implement zero trust principles tailored for OT/ICS environments. • Oversee security of IT OT converged systems, PLC, ICS, and SCADA environments. • Prepare, validate, and troubleshoot firewall rules for OT zones. • Maintain accurate OT asset inventories for PLCs, DCS/SCADA, HMIs, historians, engineering stations, and edge devices. • Manage configuration baselines and secure backups/restore mechanisms including immutable/offline backups. • Lead risk based vulnerability management, patch cycle planning, compensating controls and OT Change Advisory Board (CAB/MOC) processes. • Enhance asset management practices and ensure lifecycle security of OT components. • Manage and enhance OT incident response processes by collaborating closely with site teams and the Security Operations Centre (SOC). • Lead response and recovery activities during OT cyber events. • Deploy and optimize endpoint protection, EDR allow listing, NAC, and other monitoring tools. • Ensure compliance with IEC 62443, NIST 800 82, ISO 27001 and other regulatory/corporate security requirements.



• Conduct cybersecurity assessments (IEC 62443, NIST 800 82, etc), risk evaluations, security reviews, and audits for OT environments. • Support accreditation activities, define and develop security requirements, assist in the deployment of cyber solutions (e. g. , Domain, DNS, WSUS, etc. ), perform troubleshooting, and contribute to secure architecture design. • Identify risks, define mitigation strategies, and track remediation of security gaps. • Collaborate closely with OT Cybersecurity Architect, IT SOC, OT Governance, regional security teams and operational staff. • Ensure supply chain security for critical industrial and OT/ICS components. • Contribute to OT transformation, modernization, and upgrade projects. • Provide advanced technical support to OT users and plant teams. • Mentor junior engineers and help grow the OT Cybersecurity capability and team. • Support business development activities as required. • Build strong relationships with internal and external partners and maintain awareness of relevant cybersecurity regulations. • Mentor junior engineers and upskill plant/operations teams.

Technical Competencies

Certifications: GICSP, CISSP, ISA/IEC 62443, GCIP, CEH, CISM. ,Experience with industrial IDS platforms ,Experience with industrial IDS platforms ,Familiarity with SIS/ESD systems, data diodes, serial communications, and OT wireless technologies

Qualifications and Experience

- 8–12+ years of experience in cybersecurity with at least 5 years in OT/ICS security roles. - •Solid understanding of DCS/SCADA systems, PLCs ((Siemens/Rockwell/Schneider /Emerson/ABB/Honeywell/Yokogawa/etc), HMIs, historians, and engineering workstations. - •Handson experience with industrial protocols (Modbus/TCP, PROFINET, EtherNet/IP, OPC/OPC UA, DNP3, BACnet, etc). - •Proficiency in L2/L3 networking, VLANs, ACLs, VPNs, and industrial security appliances (firewalls, IDS/IPS, etc). - •Experience with OT cyber solutions (e. g. , Domain, DNS, backup/restore, etc. ), incident response, and SIEM/SOC integrations •Familiarity with IEC 62443, NIST 800-82, ISO 27001, etc

📌 Senior Manager-OT (Gujarat)
🏢 Adani Group
📍 Gujarat