Senior Systems Administrator

Senior Systems Administrator Location Ft. Belvoir, VA Security and Certification Requirements Tier 5 investigation and a Secret clearance. Top Secret is preferred DoD 8570/8140 baseline certification: IAT II or IAT III. Computing environment : Relevant Microsoft computing environment certification. Position Summary Nationwide IT Services, NIS, is seeking a Senior Systems Administrator to ensure the stable, secure, and efficient operation of enterprise software systems, network connections, information-management systems, servers, and applications. This is an onsite position and part of a proposal effort. The administrator plans, installs, configures, maintains, supports, and optimizes network software and communications links across multiple locations; resolves complex application and connectivity issues; leads day-to-day system administration; and recommends changes that improve capacity, performance, reliability, security, and alignment with the organization’s business vision. Key Responsibilities Hands-on Windows Server engineering and administration, Active Directory, server builds, monitoring, file services, migrations, patching, Group Policy, hardening, PKI, automation, and security incident response. Plan, install, configure, maintain, support, and optimize enterprise server platforms, network software, applications, and communication links. Organize and direct the configuration, operation, administration, and sustainment of information-management systems. Provide local and remote maintenance support for operational systems deployed at multiple locations, including general maintenance, upgrades, new server installations, and application deployments. Analyze and resolve end-user software, system-performance, access, application, and network-connectivity issues. Conduct capacity, availability, and performance analyses and recommend system configuration changes, upgrades, resource adjustments, and technology refresh actions. Automate recurring system-administration activities through approved tools and scripts to improve administrator efficiency, consistency, and accuracy. Develop, maintain, and enforce system-administration procedures, operating guides, configuration documentation, and troubleshooting runbooks. Conduct system-administrator training, skills assessments, knowledge transfer, and end-user training. Direct and coordinate the work of other system administrators responsible for daily operations, system and resource optimization, user assistance, maintenance, and issue resolution. Apply advanced technical knowledge of application networking, load balancing, high availability, redundancy, and fault tolerance. Perform vulnerability management, including vulnerability identification, assessment, prioritization, remediation, validation, and reporting. Monitor system health, security, utilization, and reliability; investigate incidents; conduct root-cause analysis; and implement corrective actions. Recommend technology direction, system architecture, modernization priorities, and infrastructure improvements that support business and mission objectives. Required Qualifications Ten years of specialized experience in information processing involving multiple hardware and software disciplines and a broad range of enterprise technology solutions. At least four years of concentrated, hands‑on experience installing, configuring, maintaining, supporting, and resolving issues with enterprise software and related systems. Bachelor of Science or Bachelor of Arts degree in a technical discipline. Relevant certification from a nationally recognized technical authority. Tier 5 investigation and Secret clearance. DoD-approved 8570/8140 baseline certification at IAT II or IAT III. Applicable DLA-approved computing‑environment qualifications for Server Admin M and Domain Admin Z in a cloud or Microsoft operating‑system environment. Microsoft Administrator Associate preferred. Demonstrated experience administering enterprise servers, applications, network services, user accounts, system resources, and security configurations. Experience conducting capacity and performance analysis, system optimization, configuration changes, software upgrades, and new installations. Experience leading or directing other system administrators and coordinating operational priorities across multiple systems or locations. Demonstrated knowledge of vulnerability management, secure configuration, patching, remediation validation, and system‑security practices. Excellent interpersonal, customer‑service, technical‑writing, training, troubleshooting, and problem‑solving skills. Preferred Qualifications Experience automating system‑administration and compliance activities with scripts and enterprise‑management tools. Experience supporting distributed operational systems through both local and remote administration. Advanced experience with application networking, load balancing, high availability, redundancy, fault tolerance, and disaster‑recovery support. Experience developing administrator procedures, delivering technical training, and assessing workforce skills. Why Join Nationwide IT Services Nationwide IT Services is a trusted government contractor supporting Department of Defense customers. Join us to work on high‑impact cybersecurity missions with experienced professionals in a collaborative, growth‑focused environment. Benefits medical, dental, and vision insurance life and disability insurance a 401(k) plan with employer match paid holidays PTO (sick/vacation) commuter benefits an employee assistance program (EAP) educational reimbursement and Pet Insurance. Salary range $110,000 to $177,000 annually The salary range is a general guideline. We consider several factors when determining base salary offers, including the position's scope and responsibilities, the candidate's experience, education, and skills, and current market conditions. #J-18808-Ljbffr Nationwide IT Services, Inc.