Windows System Administrator; Onsite - TS​/SCI Clearance Required

Role Overview

We are seeking a skilled System Administrator on Windows systems to join our IT team. The successful candidate will be responsible for the deployment, configuration, maintenance, and support of Windows 11 workstations and related infrastructure. This role requires hands‑on expertise with Windows 11, strong troubleshooting skills, and experience with modern endpoint management, security, and automation tools. The position is onsite in McKinney, TX and requires a TS/SCI clearance with active polygraph.

• Install, configure, and maintain Windows 11 operating systems and related hardware/software across the organization
• Provide advanced troubleshooting for Windows 11 workstations, including OS, application, and hardware issues
• Manage user accounts, permissions, and group policies via Active Directory
• Deploy and manage devices using Microsoft Intune, SCCM, or similar endpoint management solutions
• Oversee system updates, BIOS/driver updates, and security patches using Windows Update for Business
• Automate routine tasks and deployments using Power Shell and other scripting tools
• Maintain system documentation, configuration records, and standard operating procedures
• Collaborate with IT and security teams to support business continuity, disaster recovery, and incident response
• Provide technical support to end-users, resolve tickets, and ensure high customer satisfaction
• Participate in system upgrades, migrations, and hardware lifecycle management
• Test and validate new hardware for Windows 11 compatibility

• 1+ years experience with Windows 11
• Security clearance: TS/SCI with active polygraph
• Active and transferable U.S. government‑issued security clearance required prior to start date
• U.S. citizenship required
• Ability to lift up to 50 pounds (for hardware moves/installs)
• Security + certification preferred

We offer a robust total rewards package with compensation; healthcare, wellness, retirement and work/life benefits; career development and recognition programs. Some of the benefits include parental (including paternal) leave, flexible work schedules, achievement awards, educational assistance and child/adult backup care.

Onsite – McKinney, TX

$68,900 – $131,100 USD

RTX is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or veteran status, or any other applicable state or federal protected class. RTX provides affirmative action in employment for qualified individuals with a disability and protected veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act.