Senior Principal System Admin Lead - Onsite DoD Secret

Prattwhitney; McKinney (TX); On-site; USD 108,000 - 205,000; Full time

Job summary

RTX seeks a senior IT Systems Administrator to act as a technical authority across Linux and Windows infrastructure in classified environments. You will lead architecture, installation, and lifecycle management, coordinating with Cybersecurity and Engineering teams to ensure mission readiness and compliance.

The role requires DoD-related security clearances, hands-on leadership, and 24x7 readiness for mission-critical systems with on-site work in McKinney, TX.

Qualifications

• Active U.S. Secret security clearance.
• U.S. citizenship is required for clearance eligibility.
• Experience leading complex infrastructure implementations and upgrades.

Responsibilities

• Serve as a senior technical authority for IT systems administration across RHEL, Windows, virtualization, storage and networked environments.
• Lead architecture, installation, configuration, integration, and lifecycle management of complex Linux and Windows infrastructure.
• Provide technical leadership across all phases of system implementation, from requirements to deployment and sustainment.
• Lead troubleshooting and root-cause analysis across OS, virtualization, storage, networking, apps, and dependencies.
• Develop and coordinate corrective actions spanning multiple technical disciplines.
• Mentor and provide technical escalation for System Administrators and Senior staff.
• Establish standardized system administration processes and documentation.

Skills

Technical leadership

Mentoring

Root-cause analysis

Education

University degree or equivalent experience

Advanced degree

Tools

Red Hat Enterprise Linux

Windows Server

PowerShell

Bash

Python

Ansible

VMware vCenter

SCCM

Active Directory

DNS

DHCP

Job description

RTX seeks a senior IT Systems Administrator to act as a technical authority across Linux and Windows infrastructure in classified environments. You will lead architecture, installation, and lifecycle management, coordinating with Cybersecurity and Engineering teams to ensure mission readiness and compliance.

The role requires DoD-related security clearances, hands-on leadership, and 24x7 readiness for mission-critical systems with on-site work in McKinney, TX.