Job Description – OT Security Engineer (8+ Years Experience)

We are seeking a highly experienced OT Security Engineer with deep expertise in industrial cybersecurity, IoT security, and edge technologies to support secure IT–OT convergence initiatives across manufacturing and industrial environments.

Key Responsibilities

Design and implement OT cybersecurity frameworks aligned with IEC 62443 and NIST SP 800-82 standards
Assess, secure, and optimize Industrial Control Systems (ICS) including PLCs, SCADA, RTUs, and MES platforms
Conduct comprehensive OT risk assessments, vulnerability management, and compliance evaluations
Implement and manage OT SOC/SIEM solutions such as Splunk, Microsoft Sentinel, and IBM QRadar
Deploy and operate OT threat detection and monitoring solutions (e.g., Nozomi, Claroty, Tenable)
Design and secure IoT platforms including Azure IoT, AWS IoT, and AWS Greengrass
Architect and manage edge data pipelines for data collection, filtering, processing, and secure cloud transmission
Define and execute incident response strategies tailored for OT environments
Manage the end-to-end lifecycle of OT/IoT devices (PLCs, RTUs, HMIs, sensors), including:
- Device provisioning and onboarding
- PKI and certificate lifecycle management
- OTA updates and patch management
Design, deploy, and manage secure edge infrastructure, ensuring reliable data handling and secure communications
Implement Zero Trust principles in OT environments, including device identity (PKI), micro-segmentation, and secure remote access
Operate IoT and edge orchestration platforms such as Kubernetes and IoT Edge
Manage edge connectivity (5G/LTE, SD-WAN, LAN/WAN integration)
Oversee edge nodes, clusters, and OS/container platforms (Linux, Windows IoT, Kubernetes)
Ensure resilience and disaster recovery through geo-redundancy and failover strategies
Support edge observability and telemetry pipelines (Kafka, streaming platforms, time-series databases)
Optimize performance, power consumption, and sustainability of edge deployments

Technical Skills

Strong hands-on experience in plant OT environments (PLC, SCADA, RTU, MES)
Expertise in IoT security and edge architecture implementation
Solid understanding of device identity, PKI, and secure communication protocols
Experience with IT–OT network segmentation and Zero Trust architectures
Familiarity with AI/ML-based anomaly detection in industrial environments (preferred)
Strong analytical, problem-solving, and operational ownership mindset
Excellent communication and stakeholder management skills
Ability to collaborate effectively with CISOs, plant teams, IT, and SOC teams
Proven track record in leading security assessments and driving OT security initiatives

Experience

Minimum 8+ years of experience in OT cybersecurity / industrial security
Proven experience in manufacturing, energy, or similar industrial sectors

At Zensar, we’re “experience-led everything”. We are committed to conceptualizing, designing, engineering, marketing, and managing digital solutions and experiences for over 130 leading enterprises. We are a company driven by a bold purpose: Together, we shape experiences for better futures. Whether for our clients, our people, or the world around us, this belief powers everything we do. At the heart of our culture is ONE with Client - a set of four core values that reflect who we are and how we work: One Zensar, Nurturing, Empowering, and Client Focus.

Part of the $4.8 billion RPG Group, we’re a community of 10,000+ innovators across 30+ global locations, including Milpitas, Seattle, Princeton, Cape Town, London, Zurich, Singapore, and Mexico City. Explore Life at Zensar and join us to Grow. Own. Achieve. Learn. to be the best version of yourself.

We believe the best work happens when individuality is celebrated, growth is encouraged, and well-being is prioritized. We are an equal employment opportunity (EEO) and affirmative action employer, committed to creating an inclusive workplace. All qualified applicants will be considered without regard to race, creed, color, ancestry, religion, sex, national origin, citizenship, age, sexual orientation, gender identity, disability, marital status, family medical leave status, or protected veteran status.

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