OT Security Engineer

QUARIQ•Houston, TX

7h•Onsite

About The Position

A proactive and detail-oriented OT Security Specialist with a strong analytical mindset and practical/hands-on experience in securing industrial environments. This professional excels at understanding and managing complex and legacy OT infrastructures, and is able to advocate efficient and transparent solutions ensuring they become secure. With foundational expertise in OT network technologies and firewall configurations, this specialist can cooperate with other teams—such as operations, IT, and engineering—to assess risks, strengthen network segmentation, and maintain a resilient OT security posture.

Requirements

In-depth knowledge of OT security and networking in industrial environments (e.g., SCADA, PLCs, DCS).
Skilled in analysing and mapping complex or legacy OT networks.
Hands-on experience with segmentation and IP (re-)numbering of OT networks.
Experienced with risk assessments and developing mitigation strategies.
Practical understanding of firewalls, network segmentation, and secure architecture principles.
Understanding of the Purdue model.
Hands-on experience in implementation of at least one of the following technologies (OT-firewalling, automated network monitoring, network restructuring).
Proficient in continuous monitoring using SNMP, NetFlow, or similar protocols.
Works cross-functionally with IT/OT teams to align security with production needs.
Knowledge of Fortinet firewalls configuration.
Experience with Active Directory (AD) management.
Strong verbal and written communication skills.
Ability to translate complex OT security concepts into clear, business-relevant language for both technical and non-technical stakeholders.
Proactive in client meetings, takes initiative during commissioning, testing, and audit phases to flag risks early, propose solutions, and keep stakeholders aligned rather than waiting to be asked.
Confident representing the company in front of client teams on-site, building trust and credibility through transparent, solution-oriented dialogue.
Comfortable working cross-culturally and adapting communication style to different client organizations during international travel.
Flexibility for short-term international travel is essential.
Excellent communication skills in English are required.
Applicants must be legally authorized for employment in the United States without need for current or future employer-sponsored work authorization.

Nice To Haves

Hands-on experience with Nozomi Networks solutions (e.g., Guardian) for network traffic analysis, anomaly detection, and asset visibility in industrial/OT environments is a plus.
Cisco certificate is a plus.
Palo Alto firewall configuration is a plus.
Spanish and French are a strong asset.

Responsibilities

Analyze and map complex or legacy OT networks.
Perform segmentation and IP (re-)numbering of OT networks.
Conduct risk assessments and develop mitigation strategies.
Implement OT-firewalling, automated network monitoring, or network restructuring.
Perform continuous monitoring using SNMP, NetFlow, or similar protocols.
Work cross-functionally with IT/OT teams to align security with production needs.
Configure Fortinet firewalls.
Manage Active Directory (AD).
Analyze network traffic, detect anomalies, and provide asset visibility in industrial/OT environments using solutions like Nozomi Networks Guardian.
Translate complex OT security concepts into clear, business-relevant language for both technical and non-technical stakeholders.
Proactively participate in client meetings, commissioning, testing, and audit phases to flag risks, propose solutions, and keep stakeholders aligned.
Represent the company on-site at client teams, building trust and credibility through transparent, solution-oriented dialogue.
Adapt communication style to different client organizations during international travel.
Travel to customer sites during key project phases (e.g., commissioning, testing, audits).
Communicate effectively in English; Spanish and French are a strong asset.