Senior, System Administrator (TS/SCI Needed)

L3Harris Technologies, Inc.; Colorado Springs (CO); On-site; USD 93,000 - 172,000; Full time

Job summary

L3Harris Technologies, Inc. is seeking a Cyber Infrastructure Systems Engineer (System Administration) in Colorado Springs. The role focuses on hands-on system administration of Windows and Linux environments, AWS AMIs, security hardening, and automated patching.

You will design, implement, and monitor secure IT infrastructure aligned with DoD standards. The ideal candidate has TS/SCI clearance and 6+ years of related experience, plus DoD 8570.01-M IAT Level 2 certification.

Qualifications

• Bachelor’s degree with 6+ years of relevant experience, or graduate degree with 4+ years, or 10+ years of related experience without a degree.
• Clearance: TS/SCI
• DoD 8570.01-M IAT Level 2 or higher certs: CCNA-Security, Security+ CE, or higher
• Experience with CI/CD tools such as Jenkins and GitLab Runner
• Experience with Linux Red Hat and Windows systems, AWS EC2 supervisory tasks

Responsibilities

• Utilize AWS AMIs and implement STIG/Hardening for EC2 instances.
• Configure and monitor Linux/Windows servers for reliability and security.
• Develop automated patching and hardening workflows using AWS Systems Manager.
• Maintain secure, resilient IT environments and monitor system performance.

Skills

AWS AMI

Windows admin

Linux admin

System monitoring

Security compliance

TS/SCI clearance

Top Secret clearance

Education

Bachelor’s Degree or higher in related field

Graduate Degree

IAT Level 2 Certification (DoD 8570.01-M)

Tools

Jenkins

GitLab Runner

Virtualization

Job description

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do.

L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.

Job Title: Specialist, Cyber Infrastructure Systems Engineer (System Administration)

Job Code: 42971

Job Location: Colorado Springs, CO

Job Schedule: Standard 5/8

Job Description

We are seeking a skilled and experienced Cyber Infrastrastructure Systems Engineer (CISE) to join our Colorado Springs, CO team. The ideal candidate will have system administration expertise in Amazon Web Service (AWS) Amazon Machine Images (AMI), managing and optimizing Windows and Linux systems, as well as virtual infrastructures. This role requires a hands‑on professional with a robust understanding of security and risk management, and system monitoring. The candidate must have a proven track record of designing and implementing solutions that comply with security policies, maintaining a secure and resilient IT environment.

Essential Functions

• Utilize cloud technologies such as Amazon Web Service (AWS) Amazon Machine Images (AMI)


• Installation of monitoring agents, STIGing, and Hardening AWS AMIs


• Update Packer configurations and scripts to facilitate AWS AMI STIG/Hardening and installation of custom tools such as Viper.


• Development of an automated patching methodology using AWS System’s Manager.


• System Administration experience with AWS Elastic Compute Cloude (EC2)


• Configure, monitor, maintain, and troubleshoot Red Hat Linux systems.


• Manage and maintain Windows systems to ensure their optimal performance and reliability.


• Ensure the smooth operation and maintenance of server systems and network infrastructure to support business continuity and performance.


• Monitor system performance and resource usage, identify potential problems, and implement solutions to maintain system resilience and security.

Qualifications

• Bachelor’s Degree with a minimum of 6 years of relevant experience, or Graduate Degree with a minimum of 4 years of relevant experience, or in lieu of a degree, a minimum of 10 years of prior related experience.


• Clearance: Top Secret/Sensitive Compartmented Information (TS/SCI)


• DoD 8570.01-M IAT Level 2 Required Professional Certifications: CCNA- Security, Security+ CE, or higher certification

Preferred Additional Skills

• Experience working with Jenkins and Gitlab Runner


• Experience working with continuous integration, build management, and automated test frameworks.


• Experience utilizing virtualization technologies and backup solutions.


• Experience in a dynamic, fast-paced, team-oriented environment.

In compliance with pay transparency requirements, the salary range for this role in Colorado state is $92,500-$171,500. This is not a guarantee of compensation or salary, as final offer amount may vary based on factors including but not limited to experience and geographic location. L3Harris also offers a variety of benefits, including health and disability insurance, 401(k) match, flexible spending accounts, EAP, education assistance, parental leave, paid time off, and company-paid holidays. The specific programs and options available to an employee may vary depending on date of hire, schedule type, and the applicability of collective bargaining agreements.

The application window for this position will close on 10/1/2026.

L3Harris Technologies is proud to be an Equal Opportunity Employer. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. L3Harris maintains a drug-free workplace and performs pre-employment substance abuse testing and background checks, where permitted by law.

Please be aware many of our positions require the ability to obtain a security clearance. Security clearances may only be granted to U.S. citizens. In addition, applicants who accept a conditional offer of employment may be subject to government security investigation(s) and must meet eligibility requirements for access to classified information.

By submitting your resume for this position, you understand and agree that L3Harris Technologies may share your resume, as well as any other related personal information or documentation you provide, with its subsidiaries and affiliated companies for the purpose of considering you for other available positions.

L3Harris Technologies is an E-Verify Employer. Please click here for the E-Verify Poster in English (https://www.e-verify.gov/sites/default/files/everify/posters/EVerifyParticipationPoster.pdf) or Spanish (https://www.e-verify.gov/sites/default/files/everify/posters/EVerifyParticipationPoster.pdf) . For information regarding your Right To Work, please click here for English (https://www.eeoc.gov/sites/default/files/2022-10/22-088_EEOC_KnowYourRights_10_20.pdf) or Spanish (https://www.eeoc.gov/sites/default/files/2022-10/22-088_EEOC_KnowYourRightsSp_10_20.pdf) .