IT Security Analyst, Sr

Overview

Job Description

Stefanini Group is seeking a skilled Senior OT Cybersecurity Engineer to join our Infrastructure Services Division, within the Cybersecurity Services Tower, with direct-colleagues stretching remotely across North America, Europe and Asia, delivering high end security services to global customers.

The Senior OT Cybersecurity Engineer will be responsible for the architecture, implementation, operation, and continuous improvement of Claroty platforms across industrial and operational technology (OT) environments.

We define a Senior Cybersecurity Engineer as a professional who understands systems, failure modes, and adversaries, and can design, operate, explain, and improve security under real-world constraints.

This role acts as the technical authority for OT visibility, threat detection, asset discovery, and risk management, while also mentoring junior engineers and enabling sustainable OT security operations.

A commitment to being available for on-call responsibilities is required to ensure timely response and support when needed.

Job Responsibilities:

• Serve as Claroty and OT Security subject matter expert.
• Lead technical design, workshops and architecture reviews.
• Mentor juniors, train the trainer.
• SecOps:
• Asset discovery and classification (passive-first approach).
• Network visibility and traffic analysis, risk and exposure management, vulnerability identification, prioritization in OT contexts, threat detection and behavioral Analytics, Secure Remote Access (SRA / Claroty Xdome where applicable).
• Platform Management:
• Initial platform deployment and scaling, sensor placement and architecture design, platform tuning to reduce noise and false positives, lifecycle management (upgrades, patches, capacity planning), performance optimization in high-throughput OT Networks.
• Integration & Ecosystem Enablement:
• Security Tooling: SIEM Platforms, SOAR platforms, ITSM, CMDB, Vulnerability Management Platforms.
• Proficient in comprehending and adjusting technical configurations in Operational Technology (OT) systems in accordance with security and compliance requirements, including:
• IEC 62443 (all relevant parts)
• NIST SP 800-82
• ISO/IEC 27001 (OT applicability)
• NIS2 (where applicable)
• Sector-specific regulations (energy, manufacturing, utilities).
• Automation & Engineering:
• Scripting (Python or PowerShell minimum)
• API usage
• Data parsing (JSON, CSV, logs)
• Basic software lifecycle awareness
• Infrastructure-as-Code awareness (even if not writing it).
  

Job Requirements

Details:

• 7+ years of experience in cybersecurity, with at least 2+ years in OT / ICS security.
• Proven experience or knowledge of the Claroty platform (either on-premises or/and cloud-based) and relevant certifications.
• Proven experience securing:
• Industrial Control Systems (ICS)
• SCADA environments
• Manufacturing, energy, utilities, or critical infrastructure.
• Demonstrated experience leading end-to-end OT security initiatives, from architecture through operationalization.
• Experience working in safety-critical environments where availability and integrity are paramount.
  

• Familiarity with the Purdue model, IT/OT segmentation and zoning, Safety Instrumented Systems (SIS), and process control environments.
• Hands-on knowledge of industrial protocols, including Modbus, DNP3, OPC, Profinet, EtherNet/IP, BACnet, and IEC 60870-5-104.
• Understanding of Operational Technology (OT) assets such as PLCs, RTUs, HMIs, and DCS systems.
• Knowledge of the cyber kill chain and the MITRE ATT&CK framework (conceptual understanding rather than memorization), including common attacker techniques, supply chain attacks, ransomware operations, and various types of malware and their behaviors.
  
  

• Excellent written and verbal communication skills in English.
• Analytical mind with evaluative and problem-solving abilities, able to define technical solutions aligned with client's business problems at an architectural and design level of detail.
• Excellent at communicating technical problems and solutions to both technical and non-technical audiences.
• Strong presentation and collaboration skills.
• Able to effectively undertake challenges and have experience in leading a project and teams in a complex environment.
• Ability to manage multiple priorities and meet deadlines.
• High degree of initiative, dependability and ability to work with little supervision.
• Highly adaptable professional, able to work well with others in diverse and evolving work environments.
• Availability for on-call.