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TCMS OT Security Consultant at Weekday. Location Information: India - Remote. . This role is for one of the Weekday's clients. Salary range: Rs 500000 - Rs 1000000 (ie INR 5-10 LPA). Min Experience: 5 years. Location: Remote (India). JobType: full-time. We are seeking a highly skilled . TCMS OT Security Consultant. with 5+ years of experience in industrial cybersecurity, including a minimum of 3 years in . Operational Technology (OT) security consulting. within the . transportation or railway domain. . This is a fully remote role for candidates who possess deep technical knowledge of . Train Control and Monitoring Systems (TCMS). and are capable of implementing, auditing, and enhancing cybersecurity practices within OT environments.. Requirements. Key Responsibilities:. . . Lead OT Security Consulting Engagements:. Serve as the subject matter expert for OT security within railway and transportation systems, especially focusing on TCMS components. . . . Design and Review OT Architectures:. Develop secure OT architecture frameworks for TCMS deployments and perform in-depth reviews of existing system designs to identify and address security vulnerabilities. . . . Secure ICS/SCADA Systems:. Implement best-in-class cybersecurity controls across . Industrial Control Systems (ICS). and . Supervisory Control and Data Acquisition (SCADA). networks to ensure operational resilience. . . . Configure and Secure PLCs:. Enforce security policies at the . Programmable Logic Controller (PLC). level by configuring secure communications, access controls, and firmware validations. . . . Implement Network Zoning and Segmentation:. Design and implement . network zoning. , demilitarized zones (DMZs), and secure communication paths between TCMS components, enterprise networks, and third-party systems. . . . OT Firewall Policy Management:. Define, implement, and monitor robust . OT firewall policies. aligned with industry standards (e.g., IEC 62443), ensuring defense-in-depth across all layers of OT. . . . Support Compliance and Risk Management:. Assist in compliance initiatives and risk assessments, ensuring alignment with regulatory frameworks and internal security policies specific to the railway sector. . . . Collaborate Across Teams:. Work closely with cross-functional teams including cybersecurity, engineering, infrastructure, and system integrators to translate security strategy into actionable OT deployments. . . Required Skills and Experience:. . . 5–9 years. of overall experience in OT cybersecurity or industrial automation, with at least . 3 years of direct consulting experience. in . railway or transportation domains. . . . In-depth knowledge of . TCMS (Train Control and Monitoring Systems). , including architecture, protocols, and integration with safety-critical systems. . . Proven experience in securing . ICS/SCADA. environments in operational field settings. . . Strong understanding and hands-on experience with . PLC security. , including asset hardening, firmware verification, and access management. . . Expertise in designing and enforcing . OT firewall rules. , including allow/deny lists, deep packet inspection (DPI), and protocol-aware filtering. . . Solid knowledge of . network security architecture. , including . zoning. , . segmentation. , and . intrusion detection/prevention. within OT environments. . . Familiarity with industry standards such as . IEC 62443. , . NIST 800-82. , and . ISO/IEC 27019. is preferred. . . Preferred Qualifications:. . Bachelor’s or Master’s degree in Engineering, Computer Science, Cybersecurity, or related field. . . Certifications such as . GICSP. , . ISA/IEC 62443. , . CISSP. , or equivalent are a plus. . . Previous experience working with railway OEMs, signaling companies, or infrastructure operators is highly desirable.. . .