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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # IT/OT Network Engineer - **Company:** LINDSEY LLC - **Location:** Houston, TX, United States - **Experience:** Expert - **Salary:** $100,000.0 - $110,000.0 - **Contract:** Permanent contract - **Skills:** Border Gateway Protocol, Spanning Tree Protocols, System Configuration, Network Address Translation, Trunking, Firmware, IT Management, IP Addressing, Internet Services, Subnetting, Virtual Private Networks (VPN), Network Control, Network Diagrams, Network Connections, Network Installation Services, Network Monitoring, Routing, Network Segmentation, Packet Analyzer, Open Shortest Path First (OSPF), Remote Access Technology, TCP/IP, Virtual Local Area Networks, Wide Area Networks, Wireless Networks, Data Logging, Network Routers, System Availability, Sonicwall, Firewalls (Computer Science), Information Technology, Palo Alto Networks, Fortinet, Firewall Services Module, Industrial Software, Cisco - **Published:** October 7, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=637d836bd0f1399b ## About the Role This hands-on engineering role is responsible for network availability, performance, security, troubleshooting, and continuous improvement. The successful candidate must have strong production experience configuring, administering, and troubleshooting Fortinet FortiGate, Palo Alto Networks, and SonicWall firewalls, along with advanced routing and switching expertise. Active Cisco CCNP and Fortinet NSE 4 certifications are required. This position requires participation in an on-call rotation and travel to company locations for installations, upgrades, troubleshooting, and project support., * At least five years of hands-on network engineering experience supporting enterprise or multi-site networks. * Experience supporting both enterprise IT networks and OT or industrial network environments. * Active Cisco CCNP certification. * Active Fortinet NSE 4 certification. * Strong hands-on production experience with all three firewall platforms: Fortinet FortiGate, Palo Alto Networks, and SonicWall. * Demonstrated ability to independently configure, maintain, and troubleshoot firewall policies, NAT, site-to-site VPNs, remote-access VPNs, high availability, and routing. * Advanced knowledge of TCP/IP, subnetting, VLANs, trunking, spanning tree, inter-VLAN routing, OSPF, BGP, and network redundancy. * Experience implementing network segmentation, access controls, secure remote access, and firewall rule reviews. * Ability to troubleshoot complex connectivity issues using packet captures, logs, CLI tools, and network-monitoring platforms. * Understanding of OT change-control requirements and the importance of safety, production continuity, and coordination with operations personnel. * Strong documentation, communication, organizational, and problem-solving skills. * Ability to take ownership of incidents and projects while collaborating with technical and nontechnical stakeholders. * Willingness and availability to participate in an on-call rotation, perform after-hours maintenance, and travel as required. Join us if you're eager to leverage your technical expertise in a fast-paced environment where innovation meets operational excellence! ## Description * Manage the company's IT network infrastructure, including LAN, WAN, wireless networks, routers, switches, firewalls, VPNs, and connectivity between company locations. * Design, implement, maintain, and troubleshoot secure, reliable network connectivity across corporate and OT environments. * Configure, administer, and troubleshoot Fortinet FortiGate, Palo Alto Networks, and SonicWall firewalls, including security policies, NAT, VPNs, high availability, logging, and firmware upgrades. * Manage site-to-site VPNs, remote-access connectivity, routing, SD-WAN, and redundant internet or WAN connections. * Implement and maintain network segmentation between enterprise IT systems, OT environments, third-party access, and other security zones. * Support OT network connectivity for industrial systems, working closely with operations, controls, automation, and cybersecurity teams. * Plan OT network changes with operational stakeholders, using approved maintenance windows, validation procedures, and documented rollback plans. * Monitor network health, availability, capacity, and security events; identify and resolve issues before they affect business or operational services. * Lead troubleshooting for complex routing, switching, firewall, VPN, wireless, and application-connectivity issues. * Respond to network incidents, restore service, communicate status, and document root causes and corrective actions. * Perform network installations, firewall migrations, equipment replacements, firmware upgrades, and lifecycle refreshes. * Maintain current network diagrams, IP addressing records, configuration backups, equipment inventories, support procedures, and change documentation. * Coordinate with internet service providers, telecommunications carriers, equipment vendors, and external support partners. * Follow change-management procedures and help establish consistent network configurations, security controls, and operational standards. * Participate in the rotating on-call schedule and support scheduled after-hours maintenance. * Travel to company offices, remote sites, and operational facilities as required.