Sr. Principal System Administrators Lead

RTX (Raytheon); Woburn (MA); On-site; USD 120,000 - 170,000; Full time

Job summary

RTX in Woburn, MA seeks a Sr. Principal System Administrators Lead to design, implement and maintain secure IT infrastructure for classified programs. The role requires 24x7 operations, on-site work, and close collaboration with Cybersecurity to meet DoD security requirements.

You will lead a team, provide Windows and Red Hat Linux administration, manage AD/DNS/Kerberos, and ensure readiness for DoD 8140/8570 certifications within six months. Onsite role with occasional travel up to 5%.

Qualifications

• Bachelor's degree with 8+ years of relevant experience, or advanced degree with 5+ years.
• Active and transferable DoD secret clearance required before start date.
• Experience with Linux and Windows administration.
• Experience mentoring or leading others.

Responsibilities

• Provide IT systems administration in Windows and Red Hat Enterprise Linux environments.
• Manage Active Directory, Group Policy, and DNS configuration.
• Deep Red Hat Enterprise Linux knowledge and related services (SSSD, LDAP, Kerberos).
• Collaborate with Cybersecurity to meet security requirements and document IT processes.
• Install and configure software applications requested by end users.
• Travel up to 5% to other US locations; 100% onsite.
• Ensure systems operate 24x7 and plan for after-hours work when needed.

Skills

Linux

Windows

Leadership/Mentoring

Education

Bachelor's degree

Advanced degree (MS/PhD)

Tools

Samba

NFS

LDAP

Kerberos

Job description

Date Posted

2026-09-16

Country

United States of America

Location

US-MA-WOBURN-WB1 ~ 235 Presidential Way ~ SPENCER BLDG

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 freedom and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.

At Raytheon, the foundation of everything we do is rooted in our values and a higher calling - to help our nation and allies defend freedoms and deter aggression. We bring 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. Our team solves tough, meaningful problems that create a safer, more secure world.

Our Digital Technology (DT) organization ensures that Raytheon teammates across the globe can 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.

Sr. Principal System Administrators Lead, based in Woburn, MA internally known as Sr. Principal Analyst Infrastructure Workplace Services, collaborate with many teams to 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 :

• Provide IT systems administration in a heterogeneous Microsoft Windows and Red Hat Enterprise Linux environment.
• Understanding and knowledge of Windows Server to include but not limited to Active Directory, Group Policy, & DNS.
• Advanced Red Hat Enterprise Linux knowledge.
• Working as a team member in a fast-paced technological environment. Use troubleshooting techniques to resolve technical problems of a moderate to high scope and complexity to include the integration of hardware and operating systems (OS).
• Experience with data RAID, data encryption, and data backup uses and technologies.
• Install and configure software applications requested by end users.
• Work with Cybersecurity professionals to maintain security requirements and provide documentation and training on advanced IT processes and procedures and other tasks as assigned.
• Must be able to obtain Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification) within 6 months of start date.
• Must be able to develop solutions and documentation a variety of technical problems.
• Systems are operational 24x7 and occasionally require work effort beyond standard work hours.
• Travel is required to other US Domestic locations as business needs dictate up to 5% travel.
• 100% onsite
• Start date will not be set until interim clearance is issues.

Qualifications You Must Have:

• Typically requires a bachelor's degree and a minimum of 8 years of prior relevant experience, or an advanced degree and 5 years of direct experience.
• Must be able to obtain 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. Start date will not be set until interim clearance is issues.
• Experience with Linux and Widows
• Must have experience with leading or mentoring others.

Qualifications We Prefer :

• Strong leadership, teamwork, communication (written and oral), collaboration, and organizational skills.
• Deep experience with Red Hat Enterprise Linux (RHEL) and its ecosystem, including authentication and identity services (SSSD, LDAP, Kerberos, NIS) and file sharing/integration services (Samba, NFS).
• Expertise with automation and configuration man