Principle Linux/VMware Systems Administrator- Must have a TS/SCI Poly clearance

RTX (Raytheon); Pascagoula (MS); On-site; USD 110,000 - 150,000; Full time

Job summary

RTX (Raytheon) seeks a Principal Linux/VMware System Administrator based in Stennis, MS. The role focuses on monitoring and maintaining security posture and system health for mission-critical, classified programs.

The position requires an active TS/SCI poly clearance, U.S. citizenship, and DoD 8570 IAT Level 2 certification (or clearance to obtain within 30 days). It’s an onsite MS role with collaboration across program teams.

Qualifications

• Typically requires a bachelor’s degree and 5+ years of relevant experience (or a master’s with 3+ years).
• Active and transferable TS/SCI clearance required before start date; U.S. citizenship is required.
• DoD 8570 IAT Level 2 certification (or higher) or obtain within 30 days; certifications include Security+ CE, CCNA Security, GICSP, GSEC, SSCP, CySA+, CND.
• Experience in VMware and Linux systems administration with customers in technical operations or engineering.
• Experience configuring domain information utilities (Active Directory, Centrify, LDAP).

Responsibilities

• Performs software and system maintenance on mission systems across Linux, Windows, and VMware.
• Performs routine maintenance and system monitoring tasks.
• Detects outages, documents issues, and develops workarounds for recovery.
• Document problems in logging and discrepancy reporting tools.
• Collects environment data at time of failure to support DR investigations and resolution.
• Monitors system performance and conducts trend analyses.
• Supports system engineering teams for ongoing analysis and integration.
• Interacts directly with the customer in day-to-day activities.

Skills

Linux systems administration

VMware expertise

Customer collaboration

Problem solving

Documentation

Education

Bachelor's degree in a technical field

Master's degree (preferred)

Tools

VMware

Active Directory

Centrify

LDAP

Windows

Linux shell

Job description

Date Posted: 2026-10-07

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 1

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.

Empowering a global business. Providing affordable solutions. Delivering competitive discriminators by unleashing deep expertise. These are just some of the many ways the Digital Technology team at Raytheon Technologies creates success for our customers. Joining our Program Execution team will allow you to collaborate with RTX organizations to enable business growth, speed, and agility through business innovation, technical proficiency, and operational excellence.

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/VMWare System Administrator based in Stennis, MS, 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 to include Linux, Windows, and VMWare
• 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

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 in VMWare and Linux Systems Administration working with customers in technical operations or engineering
• Experience configuring domain information utilities, such as Active Directory, Centrify, LDAP

Qualifications We Prefer:

• Experience presenting technical information to customers, clients and/or i