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IT Infrastructure Systems Administrator

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Robert Half

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Location:
United States , Gaveston

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Category:
IT - Administration

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Contract Type:
Not provided

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Salary:

Not provided
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Job Responsibility:

  • Take ownership of configuring, deploying, and supporting a wide range of enterprise network systems, including switches, routers, firewalls, wireless infrastructure, access points, and storage networking technologies, following established best‑practice standards
  • Develop and maintain clear internal documentation covering network designs, system configurations, topology maps, lifecycle changes, patch schedules, and service histories
  • Use network monitoring and alerting platforms (such as SolarWinds, Servers Alive, or FortiCloud) to identify issues proactively and resolve them before they impact operations
  • Provide written recommendations on long‑term network improvements, capacity planning, and security enhancements
  • Assess the overall network architecture to ensure it aligns with departmental needs and supports system performance, application delivery, and user experience
  • Configure and maintain enterprise firewalls, including routing, VPN tunnels, and encryption settings, following security best practices
  • Perform research and apply firmware updates, hotfixes, and patches for critical network and server systems
  • Manage and support both virtualized and physical server environments

Requirements:

  • Strong command of TCP/IP fundamentals and hands‑on experience with VLANs, Layer 2/3 routing, spanning‑tree variations, and common static/dynamic routing protocols
  • Good understanding of high‑availability and redundancy technologies, including link aggregation (LAG/LACP) and automated failover
  • Able to troubleshoot complex issues independently or collaboratively by isolating problems, identifying root causes, and implementing corrective actions
  • Confident working with vendors for escalated support and capable of documenting vendor guidance and resolutions
  • Ability to analyze firmware and patch notes to determine potential environmental impact
  • Skilled at diagnosing issues across both virtual and physical networking layers, including VLAN segmentation
  • Familiarity with modern VoIP platforms (Call Manager, Unity, Cisco ER, contact center technologies, SIP, Webex, Teams)
  • Experience with VMware and virtual computing infrastructures
  • General understanding of hybrid Active Directory environments, especially around authentication, authorization, and security
  • Basic understanding of certificate creation, installation, and usage
  • Familiarity with system backup strategies and restoration processes
  • Bachelor’s degree in computer science, information systems, or a related technical discipline preferred
  • Certifications such as Network+, Security+, CCNA, or equivalent industry credentials are desirable
  • 3–5 years of hands‑on experience in several core networking areas: Switching, Routing, Firewalls, Wireless systems
  • Must hold or be able to obtain a valid Texas driver’s license.
What we offer:
  • medical, vision, dental, and life and disability insurance
  • eligible to enroll in our company 401(k) plan

Additional Information:

Job Posted:
January 21, 2026

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