Senior System Administrator—Windows/Linux Infra & Automation

Innovative Signal Analysis, Inc.; Aurora (CO); On-site; USD 130,000 - 165,000; Full time

Job summary

Innovative Signal Analysis, Inc. seeks skilled engineering professionals for Junior to Senior System Administrator roles.

You will administer Windows and Linux servers, manage AD, PKI, and certificate services, and contribute automation and infrastructure improvements across Colorado and Texas facilities. The position requires a TS/SCI clearance with CI Polygraph and a relevant degree or equivalent experience.

Qualifications

• Active TS/SCI security clearance with CI Polygraph is required.
• Bachelor’s degree in CS/IT/CE/Cybersecurity or related field preferred.
• Onsite work in Colorado; occasional travel to ISA’s Texas facilities.
• Willingness to support planned maintenance or critical incidents outside normal hours when necessary.

Responsibilities

• Administer, secure, maintain, and troubleshoot Windows and Linux servers, workstations, applications, and supporting infrastructure.
• Support Windows 11, Windows Server 2022, RHEL 8/9, Microsoft 365, AD, DNS/DHCP/Exchange, WSUS, and certificate services.
• Perform system provisioning, patching, upgrades, vulnerability remediation, configuration changes, backups, and lifecycle maintenance.
• Monitor system health, performance, capacity, availability, and security events.
• Support users and engineering teams through helpdesk, ticketing, incident response, and RCA processes.
• Participate in infrastructure projects and, depending on experience, lead technical planning and implementation.
• Create and maintain system documentation, diagrams, procedures, build guides, and troubleshooting records.
• Collaborate with coworkers, users, vendors, and leadership across Colorado and Texas.

Skills

Systems administration

Core infrastructure

Networking

Virtualization and storage

Provisioning and automation

Security and compliance

Support and communication

Mentoring/leadership

Education

Bachelor’s degree in Computer Science, Information Technology, Computer Engineering, Cybersecurity, or related field

Experience/certifications may substitute for degree

Tools

Ansible

Terraform

GitLab

Kubernetes

Packer

Nexus

Job description

Innovative Signal Analysis, Inc. seeks skilled engineering professionals for Junior to Senior System Administrator roles.

You will administer Windows and Linux servers, manage AD, PKI, and certificate services, and contribute automation and infrastructure improvements across Colorado and Texas facilities. The position requires a TS/SCI clearance with CI Polygraph and a relevant degree or equivalent experience.