Windows System Administrator (Onsite) (DoD Secret Clearance)

Collins Aerospace; El Segundo (CA); On-site; USD 96,000 - 182,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

Three weeks vacation

401(k) with match

Tuition reimbursement

Student Loan Repayment

Job summary

Collins Aerospace is seeking an experienced Systems Administrator to join our Information Workplace Services team in El Segundo, CA. This onsite role supports a multi-platform, classified environment, maintaining Windows and RHEL servers, applying patches, and ensuring security compliance per NIST 800-53.

You will manage user access, perform backups, and coordinate with other IT teams on complex incidents and DR testing. A DoD SECRET clearance and Security+ certification are required.

Qualifications

• 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 applying DoD STIGs to Windows and RHEL systems.
• Proven experience as a System Administrator with Windows and RHEL.
• Proven experience with ESXi virtualization.

Responsibilities

• 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 IT teams to resolve complex issues.
• Develop and implement backup and disaster recovery procedures.
• Maintain documentation of system configurations and procedures.

Skills

Problem solving

Communication

Independent work

Team collaboration

Education

University degree

Advanced degree

Tools

VMware ESXi

Windows Server

RHEL

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:

Some of our competitive benefits packages include:

• 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 illnessinsurance, 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.

Onsite: Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products.

Regardless of your role type, collaboration and innovation are critical to our business and all employees will have access to digital tools so they can work with colleagues around the world – and access to Collins sites when their work requires in-person meetings.

At Collins, the paths we pave together lead to limitless possibility. And the bonds we form – with our customers and with each other -- propel us all higher, again and again.

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 95,500 USD - 181,700 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.

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