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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Systems and Network Administrator - **Company:** IERUS TECHNOLOGIES - **Location:** Huntsville, AL, United States - **Experience:** Experienced - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Access Network, Active Directory, Systems Engineering, User Authentication, Microsoft Online Services, CompTIA Security+, Dynamic Host Configuration Protocol, Linux, Domain Name System (DNS), Identity and Access Management, Virtual Private Networks (VPN), Network Troubleshooting, Windows Servers, Routing, Red Hat Enterprise Linux, Microsoft SharePoint, Software Engineering, Virtual Local Area Networks, Network Routers, Computer Networking Systems, Identity Services Engine, Computer Network Technologies, Wireless Devices, Information Technology, Atlassian Tools, Cisco Switches, Cisco - **Published:** May 28, 2026 - **Apply:** https://www.dice.com/job-detail/fe8d7194-3953-4f62-810a-5fcbdeb2ad49 ## About the Role The ideal candidate has 5-8 years of IT experience in the defense industry, including at least 3 years working directly with networking technologies., * 5-8 years of IT experience * Minimum of 3 years networking experience * Current CompTIA Security+ certification * Strong experience with Cisco networking technologies (switching, routing, VLANs, ACLs, etc.) * Experience administering Palo Alto firewalls and security policies * Experience supporting Microsoft 365 environments * Strong knowledge of Active Directory and Windows Server administration * Experience with network troubleshooting tools and monitoring platforms * Strong documentation skills and familiarity with IT change management processes * Ability to troubleshoot complex infrastructure issues across systems and networks Preferred Qualifications * Experience working in CMMC, NIST 800-171, or similar environments * Hands-on experience with Cisco ISE for network authentication and access control * Cisco CCNA or CCNP certifications ## Description IERUS specializes in electromagnetic spectrum technologies and design for RF, IR, and optical applications. IERUS also supports customers with a diverse set of competencies including software development, air and missile defense, and systems engineering. IERUS develops value for our defense and commercial customers through accelerations of the technology life cycle: identifying, creating, transitioning, and producing technologies with integrity of purpose and product., IERUS Technologies is seeking a Systems Administrator with strong networking experience to support and help maintain an enterprise environment operating under CMMC compliance requirements. This role blends traditional systems administration with hands-on networking responsibilities, supporting infrastructure that includes Cisco networking, Palo Alto security appliances, Microsoft 365 services, and enterprise IT management platforms., * Administer and maintain the organization's CUI network and overall systems infrastructure in the interest of maintaining compliance with applicable federal regulations and cybersecurity frameworks. * Configures, monitors, and troubleshoots Cisco switches, routers, and wireless equipment as part of day-to-day operations. * Administers Cisco ISE to manage network access, authentication, and policy enforcement. * Manages Palo Alto firewalls, including maintaining security rules, configuring VPNs, and monitoring for potential threats. * Supports Microsoft 365 services such as Exchange Online, SharePoint, Teams, and identity management. * Manages Active Directory, Group Policy, DNS, DHCP, and other authentication systems. * Supports Atlassian tools like Jira and Confluence used for ticketing, documentation, and internal workflows. * Respond to urgent network or infrastructure incidents and support after-hours troubleshooting when required. * Manages and configures both Windows 11 and RHEL operating systems. * Monitors network performance and troubleshoots connectivity issues across LAN, WAN, and VPN connection. * Assists with endpoint management, patching, and configuration compliance for both Windows and Linux systems. * Effectuates CMMC requirements, including documentation, implementation of security controls, and audit preparation. * Works closely with the team, other business operations members, and engineers to keep systems running securely and reliably. ## Related Videos - [How Cisco embraced a DevOps culture within its network engineering team](https://www.wearedevelopers.com/videos/99-how-cisco-embraced-a-devops-culture-within-its-network-engineering-team) - [Creating a routing app with Google Maps API from scratch](https://www.wearedevelopers.com/videos/831-creating-a-routing-app-with-google-maps-api-from-scratch) - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) ## Related Articles - [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) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [IT Salaries in UK](https://www.wearedevelopers.com/magazine/288-it-salaries-in-uk) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)