Principal System Administrator- TS/SCI Poly clearance
Listed on 2026-07-08
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IT/Tech
Unix/Linux, Systems Administrator
Location: US-MS-PASCAGOULA-1000-CUST – 1000 Access Rd – ACCESS (External Site)
Date Posted:
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 supporting 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.
- 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 libraries.
- Experience with storage products such as Dell/EMC (e.g., Isilon/Power Scale) and/or Net App.
- Must have experience with troubleshooting and debugging applications.
- Experience with Veritas tape libraries and/or Hitachi VSPs.
- The 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 audiences.
- Experience presenting technical information to customers, clients, and/or internal audiences.
- A thorough understanding of operating system concepts such as swapping and paging, inter‑process communication, and devices and device drivers.
- Ability to navigate, debug, and modify programs in an advanced programming language.
- Experience configuring domain information utilities, such as Active Directory, Centrify, LDAP, and DNS.
- Working knowledge of thin‑client technologies.
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.
The salary range for this role is 86,800 USD – 165,200 USD. Hired applicants may be eligible for benefits, including 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 depend on the business unit and whether the position is covered by a collective‑bargaining agreement.
Hired applicants may also be eligible for annual incentive compensation programs, subject to performance factors.
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.
We offer relocation assistance for the right candidate.
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