Senior IT Systems Administrator

PositionSenior IT Systems AdministratorLocationCentennial, ColoradoClearanceActive TS/SCICompany OverviewGrey 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—Grey Matters Defense Solutions, LLC delivers unique artificial intelligence algorithms and applications, positioning itself as a leader in innovative solutions for defense and intelligence.Position OverviewGrey 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.Technical SkillsExpert-level Microsoft 365 GCC High administration, architecture, and governanceAdvanced Windows Server and enterprise desktop administrationCMMC (Cybersecurity Maturity Model Certification) Level 2+ compliance implementation and program managementEnterprise network architecture and administration including TCP/IP, DNS, DHCP, VPN, firewall management, and security segmentationActive Directory and Group Policy design and implementationSecurity baseline development, implementation, and continuous monitoringExperience10+ years in IT systems administration with increasing responsibility5+ years in defense contracting or government environmentsProven experience leading DoD compliance frameworks (NIST 800-171, DFARS, CMMC)Track record managing complex security controls and successful compliance auditsExperience developing and maintaining System Security Plans (SSPs) and other compliance documentationClearance & ComplianceActive clearance or ability to obtain and maintain TS/SCIU.S. Citizenship requiredPreferred QualificationsLinux system administration and architecture (Red Hat/CentOS/Ubuntu)AWS cloud infrastructure design and administrationSCIF (Sensitive Compartmented Information Facility) networking, accreditation, and operationsExtensive experience with classified network environments and cross-domain solutionsProfessional certifications (Security+, CISSP, CCSP, MCSE, CCNP)GitLab CI/CD pipeline administration and DevSecOps practicesExperience with MSSP vendor management and service integrationResponsibilitiesLead Microsoft 365 GCC High environment architecture, administration, and optimizationDrive CMMC Level 2 compliance program including assessment readiness and continuous improvementArchitect and manage Windows server infrastructure and enterprise servicesDesign and maintain secure network architecture across classified and unclassified environmentsDevelop and enforce security policies, procedures, and technical standardsLead incident response, security monitoring, and vulnerability management programsManage vendor relationships and evaluate technology solutionsPlan and execute infrastructure projects and technology roadmap initiativesSupport strategic IT planning and budget developmentManage IT asset inventory and lifecycle including laptops, workstations, peripherals, and network equipmentPerform physical installation and configuration of hardware systems and network infrastructureSalary Range$105,000 - $175,000 + 25% Employer funded SEP IRA distributed monthlyBenefitsGrey Matters Defense Solutions, LLC offers a comprehensive benefits package including medical, dental, vision, life insurance, short-term and long-term disability.25% (of salary) employer contribution distributed monthly to your SEP IRAIndividual Benefit Account 25% (of salary to pay for medical insurance premiums and funded time off)Employee assistance programEmployee discountHealth savings accountReferral programContactQuestions contact: jenny.rosenberg@greymattersdefense.comEqual Opportunity StatementAll qualified applicants will receive consideration for employment regardless of race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.Grey Matters Defense Solutions, LLC participates in E-Verify. Federal law requires all employers to verify the identity and employment eligibility of all persons hired to work in the United States.Grey Matters Defense Solutions, LLC complies with the Colorado Artificial Intelligence Act (CAIA) and maintains policies, controls, and oversight practices designed to mitigate algorithmic discrimination, promote transparency, and ensure responsible use of AI systems in accordance with Colorado law.J-18808-Ljbffr