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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior IS Systems Administrator - **Company:** Modern Technology Solutions, Inc. - **Location:** Beavercreek, OH, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Secure Shell (SSH), Microsoft Windows, Active Directory, Antivirus Softwares, Software Applications, CompTIA Network+, CompTIA Security+, Cyber Security, Information Systems, Computer Networks, System Configuration, Dynamic Host Configuration Protocol, Domain Name System (DNS), Firmware, Networking Hardware, Network Troubleshooting, Linux System Administration, Simple Mail Transfer Protocols, Microsoft Office, System Center Configuration Manager, Network Configuration and Change Management, Network Protocols, Performance Tuning, SAP (Applications), Service Pack, Software Systems, TCP/IP, Telnet, Backup and Restore, Windows Desktop, Network Routers, Data Storage Management, File Transfer Protocol (FTP), Malware, Information Technology, Laptops, Data Management, Routing & Switching, Hardware Infrastructure, Network Server - **Published:** September 11, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9153883/senior-is-systems-administrator ## About the Role * Experience administering systems in a classified environment * Patching and Security hardening of classified systems * Basic knowledge of federal security requirements and mandates [e.g., RMF, Federal Information Processing Standards (FIPS), National Institute of Standards and Technology (NIST)] * Security hardening and Certification & Accreditation experience * Experience with classified networks/environments such as JWICS and SGN as well as secure communications devices including STE/VIPER phones and TACLANE Encryptors. Technical experience should include: * Strong Microsoft Windows background with some knowledge of UNIX/LINUX * Knowledge of various computer software applications, hardware platforms, networking components and LAN/WAN architecture * Experience installing, configuring, and troubleshooting Windows Operating Systems * Experience managing user and group permissions in Active Directory * Experience troubleshooting redirected folders and offline file synchronization issues * Experience building, monitoring, patching, configuring and troubleshooting Windows 2019/2022/2025 servers * Installation and configuration of hardware and software * Performance tuning and Troubleshooting * Account maintenance * Proficiency in the basic Microsoft Office (365 experience preferred) * Experience troubleshooting common networking issues on client systems * Strong knowledge of standard networking protocols such as TCP/IP, DHCP, DNS, and network hardware such as switches and routers * Experience working with business class server hardware; including hardware/firmware upgrades and troubleshooting * Experience with common network protocols and services (TCP/IP stack), such as DNS, SMTP, FTP, Telnet, SSH etc. * Experience with Storage management, such as partitioning local disks and/or SAN/NAS implementations * Experience with a major system deployment and management technology, such as Microsoft MDT/SCCM, or other General experience should include: * Experience in a fast-paced environment * Deep interest in learning and developing new skills * Excellent oral and written communication skills * Strong organizational skills and ability to manage multiple tasks concurrently * Excellent time management, scheduling, and organizational skills * Ability to work well independently as well as follow detailed instructions for completing tasks * Must be a team player and be able to work within all levels of a project team * Excellent Customer Service skills * Requires proactive problem solving and troubleshooting/diagnostic skills. * Ability to provide after-hours/on-call support for critical services * Ability to lift standard PC equipment and peripherals for the purpose of installation / moves / replacements / etc. Approximately 50 lbs. * Ability to work on multiple projects and tickets at the same time * Experience working in a corporate IT environment Minimum Training/Education Required: * Bachelor's degree in computer science, Information Systems or related technical degree; or bachelor's degree in non-related field accepted with adequate training and experience * Minimum of four (4) years of experience working in an IA-related field * Minimum of six (6) years of experience in System Administration * CompTIA Security+ certification or ISC2 CISSP Desired Training/Education: * One or more enterprise level certifications such as MCSA or MCP certification * CompTIA Network+ Clearance Requirements: Current DoD Secret clearance with the ability to obtain a TOP SECRET/SCI clearance. ## Description The Senior Systems Administrator develops and maintains all systems, applications, security and network configurations. Responsible for installing new software releases, system upgrades, installing patches and resolving server and desktop related issues. Troubleshoots network performance issues and maintains a disaster recovery plan to include routine backup and recovery. Engineer solutions, research, and plans for adoption of new technologies to provide a competitive advantage to the company. Establishes practices, procedures, and concepts related to Information Technology as it relates to the organization. Administers Collateral, Special Access Program (SAP) and Sensitive Compartmented Information (SCI) information systems (IS). Handles system administration and cyber security such as antivirus maintenance and patching for Classified systems, as well as end-user system support for Unclassified systems. This is a dual-role position supporting both the Classified systems and Unclassified Enterprise. * Maintain customer-required Information Assurance (IA) certifications such as Security+ as required * Work with security personnel to identify and remediate findings * Schedule, perform, and maintain records of Operating System patching, application patching, system maintenance, antivirus updates, and software/hardware changes * Implement and maintain system backups as needed * Deploy and configure desktops/laptops, printers, networking devices, and software * Troubleshoot network hardware/software (routers, switches, etc.) * Install/upgrade operating systems and application software * Image systems with Microsoft Development Toolkit (MDT) * Diagnose Windows 11, Office 2019/2022/2024/365 and other application issues * Malware and virus removal/repair * Track and maintain computer assets using asset management tools * Provides analysis related to the design, development, and implementation of hardware and software solutions * Manage all aspects of Windows Active Directory infrastructure * Manage LINUX-based systems * Support secure communications equipment including STE/VIPER phones and TACLANE Encryptors. * Installation, configuration, and support of servers, enterprise storage and associated equipment, network and direct attached storage systems and associated equipment * Plan and coordinate system utilization, and perform growth analysis and capacity planning * Review current system and make technical/process recommendations for improving efficiency * Develop, implement, manage, and maintain security standards, procedures, and guidelines for multiple platforms * Develop scripts and automation to improve operations productivity * Deploy servers for new or existing projects; keep deployed systems current with OS, hardware and software patches and upgrades * Demonstrate professionalism in response to customer requests * Coordinate with customers to upgrade, retire or consolidate applications and server hardware as appropriate * Research and/or contact vendors regarding technical problems and solutions * Troubleshoot servers * Document systems deployments and configurations ## Related Videos - [An Applied Introduction to eBPF with Go](https://www.wearedevelopers.com/videos/1075-an-applied-introduction-to-ebpf-with-go) - [Chat App Leak, Tesla’s Blurry Dashcam, and Meta Currency Beats Bitcoin - Keith Cirkel](https://www.wearedevelopers.com/videos/1857-chat-app-leak-tesla-s-blurry-dashcam-and-meta-currency-beats-bitcoin-keith-cirkel) - [Agentic employees in world's most downloaded FinTech app](https://www.wearedevelopers.com/videos/100123-agentic-employees-in-world-s-most-downloaded-fintech-app) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [The Developer Workstation Blind Spot: Why Your Security Stack Can't See What Matters Most](https://www.wearedevelopers.com/videos/100254-the-developer-workstation-blind-spot-why-your-security-stack-can-t-see-what-matters-most) - [Turning Container security up to 11 with Capabilities](https://www.wearedevelopers.com/videos/718-turning-container-security-up-to-11-with-capabilities) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers) - [System change: restart as developer?](https://www.wearedevelopers.com/magazine/39-system-change-restart-as-developer) - [7 Important Tips That Every Software Developer Should Know](https://www.wearedevelopers.com/magazine/101-7-important-tips-that-every-software-developer-should-know) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer)