DoD-Cleared Principal Systems Administrator (Onsite)

RTX; Andover (MN); On-site; USD 87,000 - 165,000; Full time

Benefits offered by this job

Relocation eligibility

Job summary

RTX seeks a Principal Systems Administrator based in Andover, MA, to design, implement, and maintain secure Windows and Linux environments for classified programs in a 24x7 operation. You will manage patching, remediation, and compliance with DoD standards while coordinating with Cyber Security and engineering teams.

The role requires active security clearance, U.S. citizenship, and 100% on-site work in a DoD environment with occasional after-hours support and travel.

Qualifications

• Typically requires a University Degree or equivalent experience and minimum 5 years prior relevant experience, or An Advanced Degree in a related field and minimum 3 years’ experience
• Active and transferable U.S. government issued secret security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance
• Experience configuring, administering, securing, and hardening Windows and RHEL servers
• Experience with VMware virtualization
• Experience with enterprise Windows services, including Active Directory, Group Policy, and identity integration.

Responsibilities

• Serve as a Principal Systems Administrator supporting Windows and Linux enterprise environments, responsible for the design, implementation, maintenance, patching, and troubleshooting of Windows, RHEL, and virtualized infrastructure within a large-scale, mission-critical environment operating 24x7x365.
• Windows and Linux patching, vulnerability remediation, and compliance activities, including STIG/EVAL STIG implementation, SCAP/ACAS support, log collection, and close coordination with Cyber Security teams to maintain continuous compliance with DoD and regulatory requirements.
• Design, deploy, and maintain virtual infrastructure using VMware ESXi and vCenter, including VM lifecycle management, host upgrades, performance tuning, and support of critical production workloads.
• Administer and support core Windows services and integrations, including Active Directory, Group Policy, secure system configurations, certificate-based authentication, and customized user environments.
• Collaborate across Digital Technology, Engineering, Cyber Security, Networking, Storage, and Tools teams to resolve complex infrastructure, integration, and compliance challenges, while operating independently with minimal oversight.
• Support both planned and emergent operational needs in a fully on-site DoD closed-area environment, including occasional after-hours support and up to 10% travel as required to meet program objectives.
• Work independently, prioritize competing demands, and execute with minimal direction in a fast-paced operational environment.
• Full time 100% onsite position.

Skills

Windows administration

RHEL administration

VMware virtualization

Active Directory

Group Policy

Identity integration

Security hardening

Education

University Degree or equivalent

Advanced Degree in related field

Tools

VMware ESXi

vCenter

ACAS

SCAP

Splunk

STIG Viewer

Job description

RTX seeks a Principal Systems Administrator based in Andover, MA, to design, implement, and maintain secure Windows and Linux environments for classified programs in a 24x7 operation. You will manage patching, remediation, and compliance with DoD standards while coordinating with Cyber Security and engineering teams.

The role requires active security clearance, U.S. citizenship, and 100% on-site work in a DoD environment with occasional after-hours support and travel.