Senior System Administrator

LMI • Colorado Springs, CO

5d • Onsite

About The Position

LMI is seeking a skilled Senior System Administrator for its headquarters office in Colorado Springs, Colorado. The role supports system builds, security hardening, and deployment across multiple Department of War (DoW) environments and classification levels. The administrator works with infrastructure and networking technologies, resolves hardware and software issues, and collaborates with IT teams to maintain performance and availability. The position also involves creating technical documentation, diagrams, and Standard Operating Procedures, as well as communicating with customers and briefing government leadership.

Requirements

• Bachelor’s degree in a related discipline.
• 7+ years of experience in IT infrastructure management.
• U.S. citizenship.
• Active Top Secret clearance with SCI eligibility; the qualifications section specifies a Top Secret SCI clearance.
• DoD 8140/8570 IAT Level II certification, such as Security+, CISSP, or CCNA.
• Experience and proficiency with MS Office Suite (Excel, Outlook, PowerPoint, Project, and Word), SharePoint, and Defense Connect Online (DCO).
• Ability to understand and implement Agile concepts and principles.
• Skill in interpreting and applying Security Technical Implementation Guides.
• Deep understanding of TCP/IP, DNS, DHCP, VLANs, and firewall management.
• Strong analytical and organizational skills.
• Proven analytical and problem-solving abilities.
• Ability to prioritize and execute tasks effectively in a high-pressure environment.
• Strong communication skills and ability to adapt communication to a specific audience.
• Highly self-motivated and directed.
• Team-oriented, with the ability to work collaboratively.

Responsibilities

• Perform system builds, security hardening, and deployment across multiple DoW environments and classification levels.
• Work in SCI/SAP environments and follow standard SCIF processes and protocols.
• Apply networking concepts involving firewalls and routers.
• Use systems analysis techniques and procedures to resolve IT hardware and software infrastructure issues.
• Collaborate with IT teams to maintain optimal infrastructure performance and availability.
• Produce and maintain technical documentation, diagrams, and Standard Operating Procedures (SOPs).
• Work independently, managing and prioritizing tasks in a dynamic environment.
• Provide excellent customer service and communicate with and brief government leadership.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior