Systems Administrator (Okmulgee County) at Robert Half

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 ResponsibilitiesVirtualization & Server ManagementAdminister 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 & BackupManage SAN/NAS storage systems, provisioning, and performance optimization.Implement and monitor backup and recovery solutions for virtual and physical environments.Leadership & CollaborationLead 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 & ComplianceApply hardening standards for servers and network devices.Monitor for vulnerabilities and implement remediation plans.Ensure compliance with industry regulations and internal security policies.QualificationsRequired5+ 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.PreferredCertifications: 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.