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Robert Half Logo Robert Half · IT - Administration

Network Administrator

United States, Irving Employment contract · Job Posted May 29, 2026
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Job Description

We are looking for a Network Administrator to support and strengthen a complex enterprise network environment in DFW. This position focuses on building reliable Cisco-based infrastructure, improving connectivity across cloud and on-premises systems, and helping maintain secure, high-performing communications platforms. The ideal candidate brings strong technical depth in networking, voice, and infrastructure operations, along with the ability to resolve issues that affect critical business services.

Job Responsibility

  • Architect, deploy, and refine Cisco network solutions spanning routing, switching, and firewall technologies to ensure dependable enterprise connectivity
  • Manage SD-WAN implementation efforts and continuously improve performance, resiliency, and overall network efficiency
  • Administer and support VoIP platforms, with an emphasis on maintaining stable voice services and addressing service disruptions promptly
  • Oversee highly available network operations across hybrid cloud environments, including platforms integrated with Azure and on-premises infrastructure
  • Work closely with cybersecurity stakeholders to apply network protection standards, strengthen access controls, and support compliance objectives
  • Investigate and resolve advanced infrastructure incidents affecting business-critical systems, using a methodical and service-focused approach
  • Execute lifecycle maintenance activities such as patching, hardware and software upgrades, and ongoing capacity or performance improvements
  • Participate in an on-call rotation to provide timely support for urgent infrastructure events in a fast-moving operational setting

Requirements

  • At least 5 years of hands-on experience managing Cisco networking environments, including routers, switches, and firewalls
  • Minimum 3 years of experience working with SD-WAN technologies in an enterprise setting
  • At least 3 years of VoIP administration or support experience, preferably within Cisco-based voice environments
  • Solid knowledge of network architecture, LAN design, and security principles for enterprise infrastructure
  • Experience supporting hybrid cloud connectivity across cloud and on-premises systems
  • Proven ability to diagnose and resolve complex network and infrastructure issues with minimal supervision
  • Familiarity with related infrastructure technologies such as Active Directory, Windows Server services, VMware, Nutanix, or Microsoft 365
  • Cisco certifications or prior experience guiding projects or mentoring others would be considered an advantage

Nice to have

  • Cisco certifications
  • Prior experience guiding projects or mentoring others

What we offer

  • Medical, vision, dental, and life and disability insurance
  • 401(k) plan
  • Free online training
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