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.

Other Responsibilities:

• Create and maintain documentation, runbooks, and knowledge base articles for internal use.
• Automate repetitive tasks with PowerShell, Bash, or Python.
• Support backup and disaster recovery operations, including test restores.
• Mentor junior team members and share knowledge across the team.
• Stay current with emerging technologies and industry best practices.

Required Skills & Experience:

• 10+ years of hands-on systems administration experience in production environments.
• Extensive knowledge of the Linux operating system (Enterprise Linux/Debian Linux).
• Extensive knowledge of Windows Server and Active Directory, including Group Policy, DNS, and DHCP.
• Extensive experience with VMware vSphere/ESXi and Proxmox VE virtualization environments.
• Strong understanding of storage technologies (SAN, NAS, iSCSI) and server hardware.
• Strong understanding of TCP/IP networking, VLANs, and firewalls.
• Scripting experience with PowerShell and Bash. Python a plus.
• Proven, battle-tested track record recovering from real outages: failed hardware, corrupted file systems, broken domains, and upgrades gone wrong.
• Comfortable working across many technologies at once. A true jack of all trades.
• Prior experience in an MSP or multi-customer environment preferred.
• Industry certifications such as VMware VCP, RHCSA/RHCE, or Microsoft credentials a plus.

Benefits:

As a full-time employee, you'll receive a competitive salary along with a comprehensive benefits package. This includes a monthly allowance toward premiums for individual medical insurance you enroll in, group dental and vision coverage, a 401(k) retirement plan, paid time off (PTO), short- and long-term disability, life insurance, and opportunities for professional growth. We work as a team, and we want you to contribute and grow with the company.