Senior, System Administrator (TS/SCI Needed)

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

Benefits offered by this job

Health and disability insurance

401(k) match

Flexible spending accounts

Education assistance

Job summary

L3Harris Technologies is seeking a Specialist, Cyber Infrastructure Systems Engineer (System Administration) in Colorado Springs, CO. The role requires hands-on AWS, Windows and Linux system administration, security hardening, and monitoring to support national security missions.

The ideal candidate has TS/SCI clearance and DoD 8570-M IAT Level 2 certification, plus experience with automation, CI/CD tools, and virtualization. Standard 5/8 schedule with competitive benefits.

Qualifications

• Bachelor’s degree or higher with relevant experience, or 10 years of related work in lieu of degree.
• TS/SCI clearance required.
• DoD 8570.01-M IAT Level 2 certification: CCNA-Security, Security+ CE, or higher.

Responsibilities

• Utilize AWS AMIs and STIG/hardening of images.
• Update Packer configs/scripts for AMI STIG/hardening and custom tools.
• Develop automated patching using AWS Systems Manager.
• Administer AWS EC2 instances and cloud-based infrastructure.
• Configure/monitor/maintain Red Hat Linux and Windows systems.
• Ensure operational continuity of server networks and services.
• Monitor performance and security to maintain resilience.

Skills

AWS AMIs

Windows

Linux

System administration

Security monitoring

Patching automation

AWS System Manager

EC2

Red Hat Linux

Windows Server

Jenkins

GitLab Runner

VMware

Top Secret/SCI

Education

Bachelor’s Degree

DoD 8570.01-M IAT Level 2 Certification

Tools

Jenkins

GitLab Runner

VMware

Backup solutions

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.