Senior Systems Admin - Windows/Linux, Cloud & Security

Major Tool; Dallas, Northern (TX, KY); Hybrid; USD 105,000 - 145,000; Full time

Job summary

Precinmac in Dallas, TX is seeking a System Administrator III to manage, optimize, and secure our infrastructure. You will lead high‑level server, network, and cloud initiatives, provide Tier III incident resolution, and collaborate with Networking, Security, Helpdesk, and Application Support to ensure system reliability and security. The role requires 7+ years’ experience, and travel up to 20%, with preferred security and cloud certifications.

Qualifications

• 7+ years of hands-on experience as a system administrator or similar role.
• Certifications such as MCSA/MCSE, Azure Administrator, AWS SysOps, VMware VCP, or CompTIA Security+ preferred.
• Ability to travel up to 20%

Responsibilities

• Administer, maintain, and optimize Windows and/or Linux server environments.
• Manage infrastructure services including Active Directory, DNS, DHCP, Group Policy, identity and access management, and directory synchronization.
• Oversee enterprise storage, virtualization platforms (VMware/Hyper‑V), and backup/DR solutions.
• Implement and maintain security standards, patching, hardening, and monitoring across all systems.
• Provide Tier III incident and problem resolution for escalated infrastructure issues.
• Lead system upgrades, migrations, integrations, and infrastructure projects.
• Manage cloud environments such as Microsoft 365, Azure, or AWS.
• Develop and maintain technical documentation, diagrams, SOPs, and runbooks.
• Collaborate with cross‑functional teams including Networking, Security, Helpdesk, and Application Support.
• Perform capacity planning and make recommendations for system improvements

Skills

PowerShell

Automation scripts

Networking basics

Endpoint management

Education

Microsoft certs (MCSA/MCSE) or Azure/AWS certs

Tools

VMware

Hyper-V

Active Directory

Azure

AWS

Microsoft 365

Intune

SCCM

Jamf

Job description

Precinmac in Dallas, TX is seeking a System Administrator III to manage, optimize, and secure our infrastructure. You will lead high‑level server, network, and cloud initiatives, provide Tier III incident resolution, and collaborate with Networking, Security, Helpdesk, and Application Support to ensure system reliability and security. The role requires 7+ years’ experience, and travel up to 20%, with preferred security and cloud certifications.