Principal Linux System Administrator (Will Sponsor Clearance)

RTX (Raytheon); Sudbury (MA); On-site; USD 90,000 - 120,000; Full time

Job summary

RTX is seeking a Principal Linux System Administrator based in Marlborough, MA to design, deploy, and support secure, on-site Windows and Linux environments for critical DoD programs. You will lead patching, imaging, automation, and compliance activities while coordinating with Cyber Security and other IT teams.

You must be able to obtain interim DoD security clearance, be a U.S. citizen, and be onsite with occasional travel to RTX locations.

Qualifications

• University degree or equivalent or related experience.
• Experience with Windows and Linux server administration and security.
• Ability to obtain Interim DoD secret clearance before start.

Responsibilities

• Maintain secure, cost-efficient enterprise Windows and Linux environments 24x7x365.
• Design, deploy, and support virtual infrastructure via VMware ESXi and vCenter.
• Manage imaging, deployment, and automation including MECM/SCCM, PXE, and PowerShell scripts.
• Ensure STIG/EVAL STIG compliance and coordination with Cyber Security teams.
• Collaborate across IT and security teams to resolve complex infrastructure challenges.

Skills

Patch management

Windows server admin

Linux server admin

Security/compliance

Independent work

Education

University degree or equivalent

Tools

VMware ESXi

vCenter

PowerShell

MECM/SCCM

PXE

Job description

Date Posted: 2026-09-17

Country: United States of America

Location: US-MA-MARLBOROUGH-MA3 ~ 1001 Boston Post Rd ~ BLDG 3

Position Role Type: Onsite

U.S. Citizen, U.S. Person, or Immigration Status Requirements: Active and transferable U.S. government issued security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance

Security Clearance Type: DoD Clearance: Secret

Security Clearance Status: Ability to obtain INTERIM U.S. government issued security clearance is required prior to start date

At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world's most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world.

Raytheon brings the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today's mission and stay ahead of tomorrow's threat. We deliver solutions that help our nation and allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.

Our Digital Technology (DT) organization ensures that Raytheon teammates across the globe are able to communicate, collaborate and innovate for customer success. We create leading-edge technology solutions to prevent security threats, secure the integrity of our systems and support IT infrastructures around the world.

Principal Linux System Administrator based in Marlborough, MA, internally known as Principal Specialist, Information Workplace Services collaborate and support exciting, critical programs with classified information system capabilities. Success in this role means you can develop, implement, and maintain secure, cost-efficient environments across various classified programs. Program teams rely on your collaboration and guidance to define computing requirements and create end-to-end solutions to solve complex IT infrastructure problems.

What You Will Do:

• Serve as a Principal Systems Administrator supporting Windows and Linux enterprise environments, responsible for the design, implementation, maintenance, patching, and troubleshooting of Windows Server, Windows 11, RHEL 7/8/9, and virtualized infrastructure within a large-scale, mission-critical environment operating 24x7x365.


• Experience with 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.


• Engineer and sustain enterprise imaging, deployment, and automation solutions, including MECM/SCCM, PXE, Windows imaging, in-place OS upgrades, and scripted software deployment using PowerShell and automation frameworks.


• 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, DevSecOps, 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.


• Must obtain DoDD 8140/8570 baseline certification (CompTIA Security+ or equivalent) within a reasonable amount of time.

Position requires 100% onsite work in a closed area, with up to 15% travel to supported RTX locations in MA, RI, and NH (typically within 45-90 minutes).

Full-time 100% onsite position.

Qualifications You Must Have:

• Typically requires a University Degree or equivalent experience and minimum of 5 years prior relevant experience, or an Advanced Degree in a related field and minimum of 3 years experience.


• Ability to obtain an Interim U.S. government issued Secret security clearance is required prior to start. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.


• Experience with administering and securing Linux servers.


• Experience with VMware virtualization.


• Experience with securing system configurations, system hardening. Experience