Network Systems Administrator III

Iridium Satellite, LLC•McLean, VA

1d•$95,000 - $125,000•Hybrid

About The Position

Iridium is seeking an experienced Network Systems Administrator with strong Linux/Windows and security-focused infrastructure skills for its Network Engineering team at Aireon. This role involves independently delivering high-quality work and driving system deployment, hardening, and sustainment activities for Aireon’s on-premises operational networks. The primary focus will be on secure build and patch lifecycle management, centralized authentication, automation, and Tier II/III operational support. The ideal candidate will communicate proactively, collaborate effectively across distributed teams, and possess a strong ownership mindset in a fast-paced operational environment.

Requirements

Bachelor’s degree in Computer Science, Engineering, Information Technology, or related field OR equivalent relevant experience in lieu of degree.
5+ years of professional systems administration and/or IT engineering experience supporting Linux and Windows environments in a security-conscious operational setting.
Demonstrated hands-on experience installing, configuring, administering, and troubleshooting Linux and Windows systems.
Hands-on experience with OS hardening, patching, vulnerability remediation, and security controls at the OS and application layers.
Working knowledge of Internet protocols, OS/network configuration, and general IP networking concepts (OSI Layer 2/3).
Experience administering centralized authentication services (AD/LDAP) and troubleshooting authentication and access issues.

Nice To Haves

Experience with virtualization and containers.
General knowledge of Cisco IOS and/or Juniper OS.
Experience conducting or supporting network and system-level penetration testing and/or security validation activities.
Experience working in a configuration-managed operational environment with rigorous security controls.
Relevant certifications (preferred): RHCSA, RHCE, Windows Server Hybrid Administrator Associate, CompTIA Server+.
Familiarity with ticketing systems, issue tracking, and collaboration tools.

Responsibilities

Design, implement, and maintain operational, test, and development infrastructure to support Aireon’s on-premises operational networks and customer data distribution.
Install, configure, harden, and patch Linux (RHEL/CentOS/Ubuntu) and Windows systems in accordance with established security controls and stringent security requirements.
Implement and maintain automation for system administration activities using tools such as Ansible and/or Puppet to improve consistency, reliability, and auditability.
Administer and support centralized authentication solutions (e.g., Active Directory/LDAP) and resolve authentication-related incidents and change requests.
Provide Tier II/III operational support for escalated system and network-layer security incidents; perform root cause analysis and coordinate resolution with vendors, engineering, security, and subcontractors.
Maintain continuous monitoring of system resources and security posture, including configuration management, inventory/license/asset tracking, backups, off-site archives, disaster recovery readiness, and patch/update compliance.
Collect and evaluate performance data to identify systemic issues, tune systems, and ensure adequate capacity, resilience, redundancy, and performance.