Network Administrator

We are seeking a detail-oriented and proactive Network Administrator to support and manage the core IT and network infrastructure for our cybersecurity R&D environment. The ideal candidate will maintain a secure, efficient, and reliable network, support internal systems, and ensure compliance with cybersecurity best practices, particularly in support of government contracts and test environments.

This is a hands-on role supporting both production and lab networks essential for research, testing, and development activities.

Requirements

Key Responsibilities

Network Maintenance : Administer, monitor, and maintain local and wide area networks (LAN / WAN), including routers, switches, firewalls, and VPNs.

Security Management : Implement and maintain cybersecurity protocols, firewalls, intrusion detection / prevention systems (IDS / IPS), and access control policies.

System Administration : Support Windows and Linux servers, user workstations, and virtual machines; manage user accounts, backups, and patching.

Technical Support : Provide Tier I / II support to staff; troubleshoot network and connectivity issues; assist in setting up new devices and systems.

Documentation : Maintain accurate network and system documentation, configuration records, and diagrams; support asset inventory management.

Compliance Support : Ensure systems align with applicable cybersecurity frameworks such as NIST 800-171, DFARS, and CMMC; assist in audits and documentation.

R&D Collaboration : Support researchers, developers, and cyber operators by configuring and securing experimental and virtual lab environments.

Required Qualifications

Associate or Bachelor's degree in Information Technology, Network Administration, Cybersecurity, or a related field.

2+ years of experience in network or system administration roles.

Proficiency in configuring and maintaining firewalls, switches, and VPNs.

Experience with both Windows Server and Linux-based systems.

Familiarity with basic scripting, automation, and remote administration tools.

Strong problem-solving skills and the ability to work independently or in a small team.

U.S. Citizenship (required for federal contract eligibility).

Preferred Qualifications

Security+ or Network+ certification (or other industry-recognized certs such as CCNA, CEH, or Microsoft / Linux certs).

Experience supporting DoD or other government-related IT environments.

Knowledge of NIST 800-171, DFARS, or CMMC compliance.

Familiarity with virtualization (e.g., VMware, Hyper-V, VirtualBox).

Experience with ticketing systems and IT documentation platforms.

About Def-Logix, Inc.

Def-Logix, Inc. is an 8(a)-certified, Veteran-Owned Small Business headquartered in San Antonio, Texas. We specialize in advanced cybersecurity research and development, providing innovative solutions for government, defense, and commercial clients. Our mission is to secure critical infrastructure and digital assets through cutting-edge technology and operational expertise in both offensive and defensive cyber.

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