Senior IT Systems Administrator

Grey Matters Defense Solutions • Centenniual, CO

1d • $105,000 - $175,000

About The Position

Grey Matters Defense Solutions, LLC is a specialized firm in software development, data analytics algorithms, and advanced remote sensing technologies, tailored to meet the complex demands of defense and intelligence sectors. Staffed by a diverse range of professionals—from senior-level experts from organizations like the Defense Intelligence Agency (DIA), National Reconnaissance Office (NRO), Defense Advanced Research Projects Agency (DARPA), and the U.S. Armed Forces, to recent graduates and military recruits. By integrating the skills of subject matter experts, analysts, software engineers, and data scientists, Grey Matters Defense Solutions, LLC delivers unique artificial intelligence algorithms and applications, positioning itself as a leader in innovative solutions for defense and intelligence. Grey Matters Defense Solutions, LLC seeks a Senior IT Systems Administrator to lead our classified and unclassified network infrastructure serving defense contracting operations. This role requires deep expertise in government cloud environments, security compliance frameworks, and enterprise systems architecture.

Requirements

• Expert-level Microsoft 365 GCC High administration, architecture, and governance
• Advanced Windows Server and enterprise desktop administration
• CMMC (Cybersecurity Maturity Model Certification) Level 2+ compliance implementation and program management
• Enterprise network architecture and administration including TCP/IP, DNS, DHCP, VPN, firewall management, and security segmentation
• Active Directory and Group Policy design and implementation
• Security baseline development, implementation, and continuous monitoring
• 10+ years in IT systems administration with increasing responsibility
• 5+ years in defense contracting or government environments
• Proven experience leading DoD compliance frameworks (NIST 800-171, DFARS, CMMC)
• Track record managing complex security controls and successful compliance audits
• Experience developing and maintaining System Security Plans (SSPs) and other compliance documentation
• Active clearance or ability to obtain and maintain TS/SCI
• U.S. Citizenship required

Nice To Haves

• Linux system administration and architecture (Red Hat/CentOS/Ubuntu)
• AWS cloud infrastructure design and administration
• SCIF (Sensitive Compartmented Information Facility) networking, accreditation, and operations
• Extensive experience with classified network environments and cross-domain solutions
• Professional certifications (Security+, CISSP, CCSP, MCSE, CCNP)
• GitLab CI/CD pipeline administration and DevSecOps practices
• Experience with MSSP vendor management and service integration

Responsibilities

• Lead Microsoft 365 GCC High environment architecture, administration, and optimization
• Drive CMMC Level 2 compliance program including assessment readiness and continuous improvement
• Architect and manage Windows server infrastructure and enterprise services
• Design and maintain secure network architecture across classified and unclassified environments
• Develop and enforce security policies, procedures, and technical standards
• Lead incident response, security monitoring, and vulnerability management programs
• Manage vendor relationships and evaluate technology solutions
• Plan and execute infrastructure projects and technology roadmap initiatives
• Support strategic IT planning and budget development
• Manage IT asset inventory and lifecycle including laptops, workstations, peripherals, and network equipment
• Perform physical installation and configuration of hardware systems and network infrastructure

Benefits

• 25% (of salary) employer contribution distributed monthly to your SEP IRA
• Individual Benefit Account 25% (of salary to pay for medical insurance premiums and funded time off)
• Employee assistance program
• Employee discount
• Health savings account
• Referral program
• medical, dental, vision, life insurance, short-term and long-term disability

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed