Network Administrator / Sustainment Engineer

We are seeking a Network Administrator / Sustainment Engineer to support network operations within a classified, mission-critical environment. This is a sustainment-focused position responsible for maintaining, monitoring, troubleshooting, and supporting existing network infrastructure. The position is 100% onsite and requires an individual who can work effectively in a classified operational environment while collaborating with engineering and operations teams., * Maintain and support existing network infrastructure and production environments.

• Perform day-to-day network administration, monitoring, troubleshooting, and sustainment activities.
• Support Dell and Cisco-based network environments.
• Monitor network performance, availability, and overall system health.
• Troubleshoot and resolve network incidents and service-impacting issues.
• Perform routine maintenance and configuration activities.
• Ensure infrastructure remains aligned with applicable security and operational requirements.
• Collaborate with engineering, operations, and support teams to resolve technical issues.
• Support mission-critical network operations within a classified environment.
• Maintain accurate technical documentation related to network configurations, incidents, and maintenance activities.

• Active TS/SCI security clearance.
• Proven experience as a Network Administrator, Network Engineer, or Sustainment Engineer.
• Strong hands-on experience supporting enterprise network infrastructure.
• Experience with Dell and Cisco networking environments.
• Experience maintaining and troubleshooting production infrastructure.
• Experience working in classified or highly secure environments.
• Strong troubleshooting, problem-solving, and communication skills.
• Ability to work onsite full time in Aurora, Colorado.

Preferred Qualifications

• Experience supporting Department of Defense or Space Force environments.
• Experience with network monitoring and management tools.
• Familiarity with secure network operations and government security requirements.
• Experience with network configuration, hardware maintenance, and lifecycle sustainment.
• Relevant networking certifications such as CCNA, Security+, or equivalent.