Sr. Associate, Cyber Infrastructure Systems Engineer - Systems Administrator

Job Title:Sr. Associate, Cyber Infrastructure Systems Engineer -System Administration

Job Code: 44433

Job Location: Colorado Springs, CO

Job Schedule: 5/8 - Employees work 8 hours per day - 5 days a week

Job Description:

We are seeking a skilled and experienced Cyber Infrastructure Systems Engineer (CISE) to join our Colorado Springs, CO team. This role requires an experience system administrator who will be responsible for the administration and maintenance of Windows-based servers and workstations across a DoD cleared enterprise environment. Duties include managing patching activities, monitoring system performance, and implementing system hardening measures to strengthen security, ensure compliance with organizational standards, and maintain operational reliability. The position also supports ongoing troubleshooting, vulnerability remediation, and continuous improvement of system configurations and processes.

Essential Functions:

• Administer, maintain, and support Windows-based servers and workstations within a cleared enterprise or mission-critical DoD environment.
• Manage the deployment of operating system patches, security updates, and hotfixes in accordance with approved maintenance schedules and security requirements.
• Implement and sustain system hardening measures using applicable DoD security standards, STIGs, and organizational cybersecurity policies.
• Perform vulnerability identification and remediation activities to support compliance with RMF controls, POA&M tracking, and audit readiness efforts.
• Monitor system performance, availability, and operational health to ensure reliability and continuity of mission systems.
• Troubleshoot and resolve hardware, software, operating system, and access-related issues while adhering to established security procedures.
• Maintain accurate system configurations, change records, and technical documentation to support configuration management and compliance inspections.
• Coordinate with cybersecurity, network, and program teams to support accreditation activities, incident response, and secure system operations in classified or controlled environments.

Qualifications:

• Bachelor’s Degree and a minimum of 2 years of prior related experience. Graduate Degree or equivalent with 0 to 2 years of prior related experience. In lieu of a degree, minimum of 6 years of prior related experience.
• Secret Clearance
• DoD 8570.01-M IAT Level 2 Required Professional Certifications: CCNA- Security, Security+ CE, or higher certification'

Preferred Additional Skills:

• Experience serving as a DoD COMSEC Manager or supporting COMSEC account management, including handling, safeguarding, inventorying, and controlling cryptographic equipment and keying material in accordance with applicable DoD policies and procedures.
• Experience administering and supporting Red Hat Enterprise Linux (RHEL) systems in a DoD, federal, or other regulated environment, including patching, system hardening, user administration, and troubleshooting
• Utilizing virtualization technologies such as KVM, VMware, vSphere/vCenter, and microservices/containers (e.g., OpenShift, Docker) to enhance system functionality and efficiency

In compliance with pay transparency requirements, the salary range for this role in Colorado state is $70,500-$130,500. 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 11/10/2026.