Industrial OT Security Engineer: Network Risk & Firewalls

Jobtailor; Houston (TX); On-site; USD 110,000 - 160,000; Full time

Job summary

Jobtailor is seeking an OT Security Specialist to secure complex OT infrastructures in industrial settings. You will map OT networks, assess risks, and develop strategies while strengthening segmentation and IP renumbering.

The role requires hands-on firewall configuration (Fortinet) and continuous monitoring (SNMP/NetFlow), with collaboration across operations, IT, and engineering to align security with production needs.

Qualifications

• Strong analytical mindset and practical hands-on experience securing industrial environments.
• In-depth knowledge of OT security and networking in industrial environments, including SCADA, PLCs, and DCS.
• Experience analysing and mapping complex or legacy OT networks.
• Hands-on experience with segmentation and IP (re)numbering of OT networks.
• Experience with risk assessments and developing mitigation strategies.
• Practical understanding of firewalls, network segmentation, and secure architecture principles.
• Understanding of the Purdue model.
• Hands-on implementation experience with OT firewalling, automated network monitoring, or network restructuring.
• Proficiency in continuous monitoring using SNMP, NetFlow, or similar protocols.
• Knowledge of Fortinet firewall configuration.
• Experience with Active Directory management.

Responsibilities

• Secure complex and legacy OT infrastructures in industrial environments
• Analyse and map OT networks
• Assess risks and develop mitigation strategies
• Strengthen network segmentation and support IP renumbering
• Configure and manage firewalls, including Fortinet solutions
• Implement OT firewalling, automated network monitoring, or network restructuring
• Continuously monitor OT environments using SNMP, NetFlow, or similar protocols
• Manage Active Directory
• Cooperate with operations, IT, and engineering teams to align security with production needs
• Translate complex OT security concepts into clear business-relevant language
• Represent the company in client meetings and on-site engagements
• Identify risks and propose solutions during commissioning, testing, and audit phases
• Travel to customer sites during key project phases, including commissioning, testing, and audits
• Contribute to projects involving automation, process control, data management, and MES/MOM systems for manufacturers

Skills

OT Security Expertise

Network Mapping

Risk Mitigation Strategies

IP Renumbering

Firewalls

SNMP & NetFlow

Active Directory Management

Purdue Model Understanding

OT Firewalling

Automated Network Monitoring

Network Restructuring

Fortinet Configuration

Nozomi Networks

Cisco

Palo Alto Firewalls

Automation and Process Control

SCADA

PLCs & DCS

Tools

Fortinet Solutions

Nozomi Networks

Cisco

Palo Alto Firewalls

MES/MOM Systems

Job description

Jobtailor is seeking an OT Security Specialist to secure complex OT infrastructures in industrial settings. You will map OT networks, assess risks, and develop strategies while strengthening segmentation and IP renumbering.

The role requires hands-on firewall configuration (Fortinet) and continuous monitoring (SNMP/NetFlow), with collaboration across operations, IT, and engineering to align security with production needs.