Principal System Administrator- Must have active TS/SCI Poly clearance

Date Posted:2026-06-24 Country:United States of America Location:US-MS-PASCAGOULA-1000-CUST ~ 1000 Access Rd ~ ACCESS (External Site) 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 CI Poly - Current Security Clearance Status: Active and existing security clearance required on day 1At 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. 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.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.What You Will Do:You will be supporting Raytheon program in a classified environment as a Principal System Administrator and the responsibilities are as follows:You will be monitoring and support of systems that are operational 24x7 and which occasionally require work effort beyond standard work hours. This position is 8x5 with after-hours call-in responsibility.You will collaborate 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.Additionally, the position serves as a help desk team member in a customer-facing environment, so the ability to communicate effectively and respectfully with other teams and with the customer is of utmost importance, as you will be expected to uphold our excellent reputation.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.This position is 100% onsite in Stennis, MS.Qualifications You Must Have:Typically requires a university degree or equivalent experience and a minimum of 5 years of prior relevant experience or an Advanced Degree in a related field and minimum 3 years’ experience.Active and transferable U.S. government issued TS/SCI with poly security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance(on start date) Must have an active DoD 8570 IAT Level 2 certification (or higher) on 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 VMWare or Linux Systems Administration working with customers in technical operations or engineering.Experience with tape librariesExperience with storage products such as from Dell/EMC (e.g., Isilon/PowerScale) and/or Net AppMust have experience with troubleshooting and debugging applications. Qualifications We Prefer:Experience with Veritas tape libraries and/or Hitachi VSPs is a plusThe ability to work under pressure to restore high priority systems back to operations, to work effectively with frequent and direct customer interaction in a real-time operational environment, and experience presenting technical information to customers, clients, and/or internal audiencesExperience presenting technical information to customers, clients, and/or internal audiencesA thorough understanding of operating system concepts such as swapping and paging, inter-process communication, and devices and device driversAbility to navigate, debug, and modify programs in an advanced programming languageExperience configuring domain information utilities, such as Active Directory, Centrify, LDAP, and DNSWorking knowledge of thin-client technologiesWe offer relocation!What We Offer:Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: 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 ar