OT Security Engineer

Ag Solution•Houston, TX

1d•Hybrid

About The Position

AG Solution is seeking a proactive and detail-oriented OT Security Specialist with a strong analytical mindset and practical/hands-on experience in securing industrial environments. This professional will excel at understanding and managing complex and legacy OT infrastructures, and will be able to advocate efficient and transparent solutions ensuring they become secure. With foundational expertise in OT network technologies and firewall configurations, this specialist will cooperate with other teams—such as operations, IT, and engineering—to assess risks, strengthen network segmentation, and maintain a resilient OT security posture. The role involves travel to customer sites during key project phases (e.g., commissioning, testing, audits), and flexibility for short-term international travel is essential. Excellent communication skills in English are required; Spanish and French are a strong asset. The preferred location is Houston or the surrounding area. Applicants must be legally authorized for employment in the United States without need for current or future employer-sponsored work authorization.

Requirements

Strong analytical mindset.
Practical/hands-on experience in securing industrial environments.
In-depth knowledge of OT security and networking in industrial environments (e.g., SCADA, PLCs, DCS).
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.
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.
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.
Travel required to customer sites during key project phases (e.g., commissioning, testing, audits).
Flexibility for short-term international travel is essential.
Excellent communication skills in English.
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.
Implement segmentation and IP (re-)numbering of OT networks.
Conduct risk assessments and develop mitigation strategies.
Configure and manage firewalls, network segmentation, and secure architecture principles.
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).
Utilize Nozomi Networks solutions for network traffic analysis, anomaly detection, and asset visibility in industrial/OT environments.
Translate complex OT security concepts into clear, business-relevant language for both technical and non-technical stakeholders.
Proactively engage in client meetings, commissioning, testing, and audit phases to flag risks, propose solutions, and keep stakeholders aligned.
Represent the company on-site with client teams, building trust and credibility.
Adapt communication style to different client organizations during international travel.