Senior Systems Administrator - Linux, VMware & Cloud

Seneca Resources; Birmingham (AL); Hybrid; USD 90,000 - 120,000; Full time

Job summary

Seneca Resources in Birmingham, AL seeks a Senior Systems Administrator to design, administer, and optimize our infrastructure, including Windows and Linux servers, VMware virtualization, and cloud services.

You will mentor junior staff, manage Microsoft 365 and Active Directory, storage, and DR planning, while guiding architecture improvements and reliability across on-prem and cloud.

Qualifications

• Bachelor's degree in IT/CS or related field.
• 5+ years of enterprise IT/sysadmin experience.
• Expertise in Windows Server and Linux.
• Hands-on VMware vSphere/ESXi and virtualization.
• Experience with Microsoft 365 and Active Directory.
• Proficient in PowerShell and Bash scripting.
• Strong communication and problem-solving skills.

Responsibilities

• Administer, maintain, and optimize enterprise Windows and Linux server environments.
• Manage VMware vSphere/ESXi infrastructure, including configuration, maintenance, performance tuning, and troubleshooting.
• Support enterprise storage, server hardware, virtualization platforms, and core services.
• Create system diagrams, documentation, and procedures.
• Monitor health, performance, availability, and capacity for continuity.
• Administer and support Microsoft 365 services (Exchange Online, Teams, SharePoint, OneDrive).
• Manage Active Directory, GPOs, permissions, and identity controls.
• Assist with cloud-based IaaS/PaaS/SaaS solutions and roadmaps.
• Lead Tier 3 escalation, upgrades, migrations, and deployments.
• Mentor junior admins and collaborate with IT teams on initiatives.

Skills

Windows Server & Linux Admin

VMware vSphere

Microsoft 365 & AD

PowerShell / Bash scripting

Cloud Infrastructure (Azure/AWS)

Storage & Backup

Networking basics

Documentation & Diagrams

Education

Bachelor's degree in IT/CS or related field

Job description

Seneca Resources in Birmingham, AL seeks a Senior Systems Administrator to design, administer, and optimize our infrastructure, including Windows and Linux servers, VMware virtualization, and cloud services.

You will mentor junior staff, manage Microsoft 365 and Active Directory, storage, and DR planning, while guiding architecture improvements and reliability across on-prem and cloud.