Sr. Principal Linux Systems Administrator

RTX; Andover (MA); On-site; USD 108,000 - 205,000; Full time

Benefits offered by this job

Relocation assistance

Job summary

RTX is seeking a Sr. Principal Linux Systems Administrator in Andover, MA to lead secure, cost-efficient Linux IT infrastructure across classified programs. You will guide end-to-end solutions, mentoring a diverse team while aligning with program requirements and DoD standards.

The role requires on-site presence in Andover with potential relocation; candidates must currently hold U.S. citizenship and obtain interim DoD clearance as needed. RTX emphasizes security and collaboration across teams.

Qualifications

• Bachelor’s degree or equivalent with 8+ years experience, or Advanced Degree with 5+ years.
• Advanced experience administering Red Hat Enterprise Linux environments.
• Experience mentoring individuals and teams.
• Ability to obtain DoDD 8140 / 8570 Certification (Security+ CE) in time.
• Eligibility for interim DoD security clearance; U.S. citizenship required.

Responsibilities

• Manage and optimize Red Hat Enterprise Linux infrastructure.
• Serve as senior technical resource to maintain confidentiality, integrity, and availability.
• Partner with Cybersecurity to meet security requirements and provide guidance.
• Mentor junior admins across maintenance, accounts, and performance tuning.
• Lead technical meetings with teams and stakeholders for successful outcomes.
• Develop, document, and enforce system administration processes and best practices.
• Participate in Change Request reviews and Change Management Boards.
• Systems operate 24x7 and may require after-hours work.
• Travel up to 10% to other US locations as needed.

Skills

Mentoring

Team leadership

Security clearance readiness

Communication skills

Education

Bachelor’s degree or equivalent

Advanced Degree (related field)

Tools

Red Hat Enterprise Linux

VMware

Kubernetes

OpenShift

Podman

Terraform

Ansible

Windows administration

Job description

Date Posted:2026-07-16Country:United States of America

Location:US-MA-ANDOVER-AN1 ~ 350 Lowell St ~ AN1 ESSEX 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 dateAt 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.Sr. Principal Linux Systems Administrator, in Infrastructure Workplace Services, will lead and collaborate with a diverse team to support fast-paced, 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.This role requires on-site presence in Andover, MA. Relocation may be available if the selected applicant meets company policy criteria.

What You Will Do

• Manage and optimize Red Hat Enterprise Linux infrastructure, ensuring reliable and secure IT operations.
• Act as a senior technical resource for the team to maintain confidentiality, integrity, and availability of assigned IT systems and applications.
• Partner with Cybersecurity teams to maintain compliance with security requirements and provide documentation, training, and guidance on advanced IT processes and procedures.
• Mentor and guide junior administrators across a broad range of responsibilities, including corrective and preventive maintenance, routine operational tasks, account management, and system performance tuning.
• Lead and contribute to technical meetings with internal teams and program stakeholders, providing technical guidance and best practice to ensure successful outcomes.
• Develop, document, and enforce system administration processes, standards, and best practices.
• Participate in Change Request reviews and serve on Change Management Boards at various program levels.
• Systems are operational 24x7 and occasionally require work effort beyond standard work hours.
• Travel to other US Domestic locations may be required as business needs dictate. Up to 10% per year.

Qualifications You Must Have

• Typically requires a bachelor’s degree or equivalent experience and minimum 8 years prior relevant experience, or an Advanced Degree in a related field and minimum 5 years’ experience.
• Advanced experience administering Red Hat Enterprise Linux environments
• Experience mentoring both individuals and teams.
• Must be able to obtain Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent) within a reasonable amount of time.
• Ability to obtain INTERIM 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.

Qualifications We Prefer

• Experience with any of the following technologies: VMware, Kubernetes, OpenShift, Podman, Infrastructure as Code (Terraform and/or Ansible), Windows administration.
• Scripting/coding proficiency (Python/Go/PowerShell/Bash)
• Experience supporting engineers in software, simulations, and hardware development.
• Experience working with NISPOM, JAFAN, JSIG, and/or DoD/RMF guidelines.
• Strong communication skills, with ability to influence and drive change with peers and leaders across the organization.

What We Offer

• Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value:Safety,Trust, Respect, Accountability, Collaboration, and Innovation.
• Relocation assistance available, provided final candidate meets eligibility requirements

As part of our commitment to maintaining a secure hiring process, candidates may be asked to attendselect steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote. The salary range for this role is 107,500 USD - 204,500 USD. The salary range provided is a good faith estimate representative of all experience levels. RTX considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate’s work experience, location, education/training, and key skills. Hired applicants may be eligible for benefits, including but not limited to, medical, dental, vision, life insurance, short-term disability, long-term disability, 401(k) match, flexible spending accounts, flexible work schedules, employee assistance program, Employee Scholar Program, parental leave, paid time off, and holidays. Specific benefits are dependent upon the specific business unit as well as whether or not the position is covered by a collective-bargaining agreement. Hired applicants may be eligible for annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective-bargaining agreement. Payments under these annual programs are not guaranteed and are dependent upon a variety of factors including, but not limited to, individual performance, business unit performance, and/or the company’s performance. This role is a U.S.-based role. If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply. RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window. 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.

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