Senior Manager-OT

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.

 

• 8–12+ years of experience in cybersecurity with at least 5 years in OT/ICS security roles.


• •Strong understanding of DCS/SCADA systems, PLCs ((Siemens/Rockwell/Schneider /Emerson/ABB/Honeywell/Yokogawa/etc), HMIs, historians, and engineering workstations.


• •Hands‑on 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