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Systems Administrator
Systems AdministratorRobert Half • Okmulgee County, OK, United States
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Systems Administrator

Systems Administrator

Robert Half • Okmulgee County, OK, United States
[job_card.variable_days_ago]
[job_preview.job_type]
  • [job_card.full_time]
[job_card.job_description]

We are seeking an experienced Systems Administrator to manage and optimize our virtualized infrastructure and network environment. This role requires deep expertise in VMware technologies , LAN / WAN administration , and proven leadership skills to guide projects and mentor junior team members. The ideal candidate will ensure system reliability, security, and performance while driving operational excellence.

Key Responsibilities

Virtualization & Server Management

  • Administer and maintain VMware vSphere, ESXi hosts, vCenter Server , and related virtualization components.
  • Perform VM provisioning, resource allocation, snapshots, and performance tuning .
  • Manage Windows / Linux servers , patching, and OS-level troubleshooting.
  • Implement high availability (HA), DRS clusters , and disaster recovery strategies.

Networking (LAN / WAN)

  • Configure and maintain LAN / WAN infrastructure , including switches, routers, firewalls, and VPNs.
  • Monitor network performance, troubleshoot connectivity issues, and optimize bandwidth usage.
  • Ensure network security through VLAN segmentation, ACLs, and firewall policies.
  • Collaborate with network engineers on QoS, routing protocols, and IP addressing schemes .

    • Storage & Backup

  • Manage SAN / NAS storage systems , provisioning, and performance optimization.
  • Implement and monitor backup and recovery solutions for virtual and physical environments.

    • Leadership & Collaboration

  • Lead infrastructure projects , including upgrades, migrations, and new deployments.
  • Mentor junior administrators and provide technical guidance to the IT team.
  • Coordinate with cross-functional teams to align infrastructure with business needs.
  • Develop and maintain documentation, SOPs, and disaster recovery plans .

    • Security & Compliance

  • Apply hardening standards for servers and network devices.
  • Monitor for vulnerabilities and implement remediation plans.
  • Ensure compliance with industry regulations and internal security policies .

    • Qualifications

    Required

  • 5+ years of experience in systems administration with a focus on VMware and networking.
  • Strong knowledge of VMware vSphere, ESXi, vCenter , and virtualization best practices.
  • Proficiency in LAN / WAN technologies , TCP / IP, DNS, DHCP, VLANs, VPNs, and firewall configurations.
  • Experience with Windows Server and Linux administration .
  • Familiarity with backup solutions (Veeam, Commvault, or similar).
  • Proven leadership experience in managing projects or mentoring team members.
  • Strong troubleshooting and problem-solving skills.

    • Preferred

  • Certifications : VMware VCP , Microsoft Certified : Windows Server , CCNA / CCNP , or equivalent.
  • Experience with PowerShell scripting and automation.
  • Knowledge of cloud integration (Azure, AWS) and hybrid environments.
  • Exposure to ITIL practices and ITSM tools.
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