Senior System Administrator

LMI • Colorado Springs, CO

7d • Onsite

About The Position

LMI is seeking a skilled Senior System Administrator at its headquarters office in Colorado Springs, Colorado. The role supports IT infrastructure across multiple Department of War (DoW) environments and classification levels, including system builds, security hardening, and deployment. The administrator works with networking technologies and resolves hardware and software infrastructure issues, while collaborating with IT teams to maintain performance and availability. The role also involves creating and maintaining technical documentation, diagrams, and Standard Operating Procedures; working independently and prioritizing tasks in a dynamic environment; and providing customer service and briefings to government leadership. The position requires U.S. citizenship, an active Top Secret clearance with SCI eligibility, and a DoD 8140/8570 IAT Level II certification.

Requirements

• Bachelor’s degree in a related discipline.
• Seven or more years of experience in IT infrastructure management.
• U.S. citizenship.
• Active Top Secret clearance with SCI eligibility.
• DoD 8140/8570 IAT Level II certification, such as Security+, CISSP, or CCNA.
• Experience and proficiency with MS Office Suite (Excel, Outlook, PowerPoint, Project, 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 (STIGs).
• Deep understanding of TCP/IP, DNS, DHCP, VLANs, and firewall management.
• Strong analytical, organizational, problem-solving, and communication skills.
• Ability to prioritize and execute tasks in a high-pressure environment and adapt communication to specific audiences.
• High degree of self-motivation and direction.
• Ability to work collaboratively as part of a team.

Responsibilities

• Perform system builds, security hardening, and deployment across multiple DoW environments and classification levels.
• Work in SCI/SAP environments and understand 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, manage tasks, and prioritize work 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