Date Posted: 2026-10-21

 Country: United States of America

 Location: US-CO-AURORA-S75 ~ 16800 E Centretech Pkwy ~ BLDG S75

 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: TS/SCI with Poly - Current

 Security Clearance Status: Active and existing security clearance required on day 1 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. 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. 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. Principal Linux System Administrator based in Aurora CO, collaborates with many teams to support exciting, critical programs with classified information system capabilities. Success in this role means you will be responsible for monitoring and maintaining system health and security posture, directly supporting customer mission-critical capabilities. You will work closely with program developers and system engineers to research issues, determine root causes and implement solutions to system problems. This position is an 8x5 position with after-hours call-in responsibility. This position is 100% onsite in Stennis, MS. What You Will Do: • Performs software application maintenance on mission systems running a variety of operating systems with Linux • Performs routine and preventative maintenance such as general computer tasks, application loads, disk utilization, system loading and system monitoring • Detects, isolates, documents, quick reports, and resolve system outages, or problems encountered during operations of the operational system baseline, which includes the collections of diagnostic data, restoring the system operation, development of workarounds, and other activities necessary for recovery of a system • Accurately document problems in logging and discrepancy reporting tools • Collect data describing the environment at the time of the failure and perform other activities in support of Tier 3 maintenance provider DR investigation and resolution • Perform system monitoring, analyzing and document performance and conduct trend analyses as required • Also support system engineering groups as required for ongoing analysis and integration efforts • Environment fluctuates between routine and urgent, depending on ongoing tasks, priorities, and performance of assigned systems • Works directly with the customer in most aspects of the day-to-day • 100% on site Qualifications You Must Have: • Typically requires a bachelor’s degree and minimum of 5 years of prior relevant experience or a master’s degree and minimum of 3 years of prior relevant experience • Must have an active and transferable U.S. government issued TS/SCI Poly clearance prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance. • Must have an active DoD 8570 IAT Level 2 certification (or higher) or acquire one within 30 days of start date. IAT Level 2 requires one or more of the following Professional Certifications: Security+ CE, CCNA Security, GICSP, GSEC, SSCP, CySA+, CND. • Experience with Linux Systems Administration • Experience configuring domain information utilities, such as Active Directory, Centrify, LDAP Qualifications We Prefer: • Experience presenting technical information to customers, clients and/or internal audiences • The ability to work effectively with frequent and direct customer interaction in a real-time operational environment • The ability to work under pressure in restoring high-priority systems back to operations • Ability to navigate, debug, and modify programs in an advanced programming language • Ability to write PERL, python, and shell scripts • Experience with storage products from Oracle/Sun/STK, EMC, IBM, NetApp, and/or DDN • Experience with virtual / cloud computing technologies using Citrix, VMware, and Amazon Web Services (AWS) • Working knowledge of thin-client technologies • Experience designing, implementing, and troubleshooting Public Key Infrastructure (PKI)Qualified 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. As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select 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 86,800 USD - 165,200 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. Privacy Policy and Terms: Click on this link to read the Policy and Terms