Windows System Administrator (Onsite) (DoD Secret Clearance)

RTX; El Segundo (CA); On-site; USD 110,000 - 150,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

Three weeks of vacation

Generous 401(k) plan with employer匹配

Job summary

Collins Aerospace in El Segundo, CA, is seeking a Systems Administrator for an onsite role within a multi-platform, classified IT environment supporting engineering teams. You will install, monitor, and secure Windows and RHEL servers, apply DoD STIGs, and ensure data integrity and business continuity. Collaboration with IT peers and rigorous documentation are essential.

The ideal candidate holds a degree, DoD SECRET clearance, and strong problem-solving skills.

Qualifications

• Typically requires a University Degree or Advanced Degree with relevant experience.
• U.S. citizenship required; DoD SECRET clearance.
• Experience applying DoD STIGs to Windows and RHEL systems.
• Proven system administrator with Windows and RHEL expertise.
• Experience with VMware ESXi, virtualization tools, and incident response.

Responsibilities

• Install, configure, and maintain Windows and RHEL servers.
• Apply regular patches, updates, and security configurations.
• Monitor performance, ensure high availability and reliability.
• Manage users, permissions, and access controls.
• Provide end-user and engineering support; resolve incidents and service requests.
• Collaborate with IT teams to resolve complex issues; maintain documentation.

Skills

Windows Administration

RHEL Administration

Security best practices

NIST 800-53 familiarity

Incident response

Documentation

Education

University Degree

Advanced Degree

Tools

VMware ESXi

KVM

Job description

Date Posted: 2026-11-03

Country: United States of America

Location: US-CA-EL SEGUNDO-E01 ~ 2000 E El Segundo Blvd ~ BLDG E01

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: Top Secret

Security Clearance Status: Active and existing security clearance required on day 1

Collins Aerospace is a leader in technologically advanced, intelligent solutions that help redefine the aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join us and help shape the future of aerospace and defense.

We have an immediate career growth opportunity with our Information Workplace Services team for a talented Systems Administrator. This is an opportunity to work in a highly collaborative, multi-platform, multi-disciplined, classified systems environment resolving support issues for the engineering community using helpdesk and task assignment methods.

This position will be onsite in El Segundo, CA

What YOU will do:

• Install, configure, and maintain Windows and RHEL servers.
• Perform regular system updates, patches, and security configurations.
• Monitor system performance and ensure high availability and reliability.
• Manage user accounts, permissions, and access controls.
• Provide technical support and troubleshooting for end-users and internal teams.
• Respond to and resolve system-related incidents and service requests.
• Collaborate with other IT teams to resolve complex issues.
• Implement and maintain security best practices for system administration.
• Conduct regular security audits and vulnerability assessments IAW NIST 800-53.
• Ensure compliance with IT policies and regulatory requirements.
• Develop and implement backup and recovery strategies.
• Perform regular data backups and ensure data integrity.
• Test and validate disaster recovery procedures.
• Maintain accurate documentation of system configurations and procedures.
• Generate regular reports on system performance, security, and compliance.

Qualifications YOU Must Have:

• Typically requires a University Degree and minimum 5 years prior relevant experience or an Advanced Degree in a related field and minimum 3 years of experience
• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
• DoD SECRET security clearance.
• CompTia Security+ certification.
• Extensive experience with applying DoD STIGs to Windows and RHEL servers and workstations.
• Proven experience as a System Administrator with proven experience in Windows and RHEL.
• Proven experience as a System Administrator with proven experience using ESXI machines.
• Excellent problem-solving and communication skills.
• Ability to work independently and as part of a team.

Qualifications We Prefer:

• Experience with virtualization technologies (VMware, KVM).

What We Offer:

• Medical, dental, and vision insurance.
• Three weeks of vacation for newly hired employees.
• Generous 401(k) plan that includes employer matching funds and separate. employer retirement contribution, including a Lifetime Income Strategy option.
• Tuition reimbursement program.
• Student Loan Repayment Program.
• Life insurance and disability coverage.
• Optional coverages you can buy pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protection.
• Birth, adoption, parental leave benefits.
• Ovia Health, fertility, and family planning.
• Adoption Assistance.
• Autism Benefit.
• Employee Assistance Plan, including up to 10 free counseling sessions.
• Healthy You Incentives, wellness rewards program.
• Doctor on Demand, virtual doctor visits.
• Bright Horizons, child, and elder care services.
• Teladoc Medical Experts, second opinion program.
• And more!

Do you want to be part of a new, exciting initiative to combine foundational IT with new digital technologies? Our Digital Technology team is driving business efficiencies and a better customer experience by connecting technologies, people, information and processes. From making aircraft more electric, intelligent and integrated to building new software platforms such as Internet of Things, big data, artificial intelligence, and blockchain, there's no better place to be right now than in digital. If you're an agile thinker who enjoys utilizing modern technology to make big improvements, then you're a perfect fit for this team. Join Collins Aerospace to help us revolutionize the aerospace industry today!

WE ARE REDEFINING AEROSPACE.

Please consider the following role type definitions as you apply for this role.