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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # IT System Administrator - **Company:** CTC Global - **Location:** Irvine, CA, United States - **Experience:** Expert - **Salary:** $96,523.0 - $118,539.0 - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Active Directory, User Authentication, Microsoft Azure, Backup Devices, Information Systems, Dynamic Host Configuration Protocol, Disaster Recovery, Domain Name System (DNS), Ethernet, Health Information Management, Human-Computer Interaction, Supervisory Control and Data Acquisition (SCADA), Hyper-V, Identity and Access Management, Networking Hardware, Virtual Private Networks (VPN), Windows Servers, Modbus, Network Diagrams, Network Service, OLE for Process Control, Performance Tuning, Remote Access Technology, Cloud Services, Zero Trust Network Access, Systems Integration, TCP/IP, Virtual Local Area Networks, Virtualization Technology, Software Vulnerability Management, Wide Area Networks, Cloud-native Network Functions (CNF), Virtual Environment, Firewalls (Computer Science), Information Technology, Network Support, Process Control Systems, Enterprise Integration, CIS Benchmarks, Industrial Software, Vmware - **Published:** July 24, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=3b20286ee702be99 ## About the Role * Bachelor's degree in Computer Science, Information Systems, or equivalent experience Certifications (Preferred) * Microsoft (Azure / Windows Server) certifications * CCNA or equivalent networking certification * Security+ or equivalent * OT / ICS certifications (a plus) Professional Experience * 7+ years of experience in: + Systems Administration + Infrastructure / Network Support + OT / Manufacturing environment experience preferred * Experience supporting multi-site or global operations is a plus Technical Skills Systems & Infrastructure * Windows Server, Active Directory, Group Policy * Virtualization (VMware / Hyper-V) * Microsoft 365 / Azure * Backup and recovery platforms Networking * TCP/IP, DNS, DHCP, VLANs * Firewall and VPN technologies * Wireless and enterprise networking OT / Industrial Systems (Preferred) * Experience with: + PLC-connected systems + SCADA / HMI platforms + Industrial protocols (Aveva, Modbus, OPC, Ethernet/IP) * Understanding of IT segmentation and secure ICS environments Key Competencies * Strong troubleshooting and analytical skills * Ability to operate across IT and manufacturing environments * Effective communication across technical and business teams * Strong documentation and process discipline * High sense of urgency, especially for production-impacting issues ## Description The IT Systems Administrator is responsible for the administration, maintenance, and security of both IT (enterprise systems) and OT (manufacturing/industrial systems) environments across all locations. This role bridges enterprise IT and operational technology, ensuring reliable, secure, and scalable integration between servers, networks, cloud platforms, and manufacturing systems (PLCs, SCADA, HMIs). The position is critical in supporting business operations, production uptime, cybersecurity initiatives (including Zero Trust), and IT convergence strategies., IT Systems Administration (Enterprise) * Administer and maintain: + Windows Server environments, Active Directory, DNS, DHCP + Virtual environments (VMware / Hyper-V) + Cloud services (Azure / M365) * Manage system performance, availability, and patching * Support identity and access management (IAM) and Group Policy * Provide Tier 2/3 escalation support for infrastructure issues Network & Infrastructure Support * Support LAN, WAN, VPN, wireless, and cloud network connectivity * Assist with configuration and troubleshooting of network devices (switches, firewalls, APs) * Monitor infrastructure performance and availability * Collaborate with network engineering on upgrades and optimization OT / Industrial Systems Support * Support and maintain systems connected to: + PLCs, SCADA, and HMI environments + Industrial control systems (ICS) within manufacturing sites * Ensure reliable system and network communication for production equipment * Assist in troubleshooting production-impacting system issues * Coordinate with manufacturing, automation, and controls teams IT Integration & Security * Support secure integration between IT and OT environments * Implement system-level and network-level segmentation controls * Contribute to Zero Trust Architecture initiatives * Ensure secure authentication, access controls, and system hardening across environments Backup, Recovery & Business Continuity * Manage backup solutions for servers, systems, and critical OT data * Develop and maintain disaster recovery procedures * Participate in DR testing and incident recovery Monitoring, Performance & Optimization * Monitor system and infrastructure performance across IT and OT environments * Identify bottlenecks, risks, and availability issues * Implement performance tuning and system improvements Security & Compliance * Apply patches, updates, and security baselines to systems * Support vulnerability remediation and audit requirements * Ensure compliance with corporate policies and regulatory standards Documentation & Standards * Maintain documentation for: + Systems configurations + Network diagrams and dependencies + OT system integrations and workflows * Follow ITIL processes (change, incident, problem management) Cross-Functional Collaboration * Work closely with: + IT Infrastructure and Security teams + Manufacturing / Production teams + Automation and Controls Engineers * Provide guidance on system and infrastructure requirements for projects Support & Continuous Improvement * Support Helpdesk escalation tickets * Identify automation opportunities and improve operational efficiency * Mentor junior staff and promote best practices ## Related Videos - [Optimizing Land-Based Fish Feeding with Node-RED](https://www.wearedevelopers.com/videos/2032-optimizing-land-based-fish-feeding-with-node-red) - [An Applied Introduction to eBPF with Go](https://www.wearedevelopers.com/videos/1075-an-applied-introduction-to-ebpf-with-go) - [WebAssembly: The Next Frontier of Cloud Computing](https://www.wearedevelopers.com/videos/972-webassembly-the-next-frontier-of-cloud-computing) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [Enabling intelligent logistics automation: home-grown Industrial IoT platform at Austrian Post](https://www.wearedevelopers.com/videos/2018-enabling-intelligent-logistics-automation-home-grown-industrial-iot-platform-at-austrian-post) - [Turning Container security up to 11 with Capabilities](https://www.wearedevelopers.com/videos/718-turning-container-security-up-to-11-with-capabilities) ## Related Articles - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers) - [System change: restart as developer?](https://www.wearedevelopers.com/magazine/39-system-change-restart-as-developer) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [How should you format your IT resume?](https://www.wearedevelopers.com/magazine/68-how-should-you-format-your-it-resume) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology)