Sr Systems Administrator

Department: Infrastructure

Reports to: Vice President - Infrastructure

Location: Corporate Office - Plano

Date: 10/28/26

Company Description:

Edge delivers premium networking, infrastructure, cybersecurity, and managed IT systems and services.

Position Description:

Senior, hands-on generalist responsible for building, running, and fixing the systems behind Edge’s managed services customers. Works across Linux, Windows, Active Directory, VMware, and Proxmox environments, owns problems from first alert to root cause, and serves as a go-to escalation point when production is down. This is a jack-of-all-trades role for someone who has run real environments, seen them break, and fixed them under pressure.

Primary Responsibilities:

• Escalation point for L1/L2 teams for all server, virtualization, and directory related issues.
• Install, configure, and administer Linux (Enterprise Linux/Debian Linux) and Windows Server systems.
• Build, manage, and troubleshoot VMware vSphere/ESXi and Proxmox VE clusters, including storage, networking, and HA.
• Install, configure, and administer Windows Active Directory, including multi-domain and multi-forest environments, DNS, DHCP, Group Policy, and trusts.
• Apply patches, perform upgrades, and handle lifecycle maintenance across customer environments.
• Troubleshoot alerts from commercial, open source, and locally developed monitoring tools.
• System failure analysis and recovery; ensuring the consistency and integrity of file systems.
• Respond to after-hours emergency and system down escalations. Ability to work maintenance windows as they arise.
• Work projects for MSP customers including migrations, deployments, and break/fix.