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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # IS/IT SME III Linux System Admin - **Company:** PIONEER TECHNOLOGIES INC. - **Location:** Suffolk, VA, United States - **Experience:** Experienced - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Active Directory, Amazon Web Services, Amazon Elastic Compute Cloud, User Authentication, Automation of Tests, Microsoft Azure, Bash Shell, Ubuntu (Operating System), CentOS, Cloud Computing, CompTIA Security+, Cyber Security, Computer Networks, System Configuration, Dynamic Host Configuration Protocol, Debian Linux, Linux, DevOps, File Systems, Domain Name System (DNS), Monitoring of Systems, Interoperability, Storage Area Network (SAN), Virtual Private Networks (VPN), Python (Programming Language), Kernel-Based Virtual Machine, Linux System Administration, Linux Distribution, Linux Servers, Microsoft Servers, Windows Servers, Nagios, Network Attached Storage (Server Appliance), Routing, Performance Tuning, Windows PowerShell, Red Hat Enterprise Linux, Remote File Sharing, Cloud Services, Ansible, Prometheus, TCP/IP, Virtualization Technology, VMware VSphere, Software Vulnerability Management, Data Logging, Google Cloud, Cloud Platform System, Sysadmin, System Availability, Firewalls (Computer Science), Containerization, Kubernetes, Infrastructure Automation Frameworks, Information Technology, Patch Management, Nessus, Puppet, Comptia Linux+, Splunk, Docker, Server Operating Systems & Platforms, User Accounts, Vmware - **Published:** July 22, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=2d9cf41b638eb3ef ## About the Role * Active DoD Top Secret/ SCI Clearance (Minimum) * Bachelor's Degree in Computer Science, Cybersecurity, Information Technology, or a related field. (Equivalent experience may be considered in lieu of a degree). Current DoDD-8140/8570 certification (Required) * CompTIA Security+ CE * Relevant Linux certifications (e.g., RHCE, LPIC-2/3) * Relevant Windows Server certifications (e.g., MCSA, MCSE). * DoD 8570.01-M IAT Level II or higher (e.g., CySA+, CASP+). One (1) or more of the following Operating System Certifications (Minimum) * Microsoft Server Certification * Red Hat Enterprise Linux (RHEL) * CompTIA Linux+ 5+ years of relevant experience (Minimum), Minimum of 5 years of progressive experience focused on advanced Linux system administration and 2+ years of significant Windows Server administration experience. * Expert-level proficiency in multiple Linux distributions (e.g., RHEL/CentOS, Ubuntu, Debian). * Strong experience with Windows Server administration (2016/2019/2022), Active Directory, and related services. * Proven experience with scripting and automation tools (Bash, Python, PowerShell, Ansible). * Extensive knowledge of networking concepts (TCP/IP, DNS, DHCP, VPN, routing, firewalls). * Experience with virtualization technologies (e.g., VMware vSphere, KVM). * Familiarity with cloud platforms (AWS, Azure, GCP) and managing Linux instances within them. * Demonstrated understanding of cybersecurity principles, system hardening (STIGs), and vulnerability management (ACAS/Nessus) Having following skills is a PLUS: * Experience working with the Joint Staff (JS) and COCOMs. * Master's degree in a relevant technical field. * Experience with containerization technologies (Docker, Kubernetes). * Familiarity with DevOps practices and CI/CD pipelines. * Experience with enterprise monitoring solutions (e.g., Splunk, Nagios, Prometheus). * Knowledge of storage area networks (SAN) and network-attached storage (NAS) in Linux environments., * Which operating system certification do you have (RHEL, CompTIA Linux+, Microsoft Server Certification) Experience: * Linux system administration: 5 years (Required) License/Certification: * CompTIA Security+ CE (Required) * DODD-8140/8570 certification (Preferred) ## Description We are seeking a highly skilled and experienced IS/IT Subject Matter Expert (SME) III with a primary focus on Linux System Administration, complemented by strong proficiency in Windows Server environments. This role demands a deep understanding of both operating systems, their interoperability, and the strategic application of IT solutions to meet complex organizational and mission requirements. The successful candidate will serve as a top-tier technical resource, responsible for the design, implementation, maintenance, and optimization of critical IT infrastructure, ensuring high availability, security, and performance across hybrid environments., Linux System Administration: * Design, deploy, configure, and maintain complex Linux server environments (e.g., RHEL, CentOS, Ubuntu, Debian) in physical, virtual, and cloud infrastructures. * Perform advanced troubleshooting, performance tuning, and capacity planning for Linux systems. * Manage user accounts, permissions, file systems, and storage solutions. * Implement and manage system monitoring, logging, and alerting solutions. * Develop and maintain automation scripts (Bash, Python, Ansible, Puppet, Chef) for system provisioning, configuration, and task automation. Windows Interoperability & Administration: * Administer and support Windows Server environments, including Active Directory, DNS, DHCP, and Group Policy. * Ensure seamless interoperability and integration between Linux and Windows systems (e.g., authentication, file sharing, networking). * Provide expertise in troubleshooting issues that span both Linux and Windows platforms. Cybersecurity & Compliance: * Implement and enforce security best practices, including system hardening (STIGs), vulnerability management (ACAS/Nessus), and patch management. * Conduct security audits and ensure compliance with relevant DoD, industry, and organizational security policies. * Participate in incident response activities, providing expert analysis and remediation support. Infrastructure & Operations: * Manage virtualization platforms (e.g., VMware, KVM) and containerization technologies (e.g., Docker, Kubernetes) on Linux. * Support cloud-based Linux instances (e.g., AWS EC2, Azure VMs) and related cloud services. * Collaborate with network, storage, and application teams to ensure optimal system performance and reliability. * Develop and maintain comprehensive documentation for system configurations, procedures, and architectural designs. Mentorship & Leadership: * Serve as a Subject Matter Expert, providing technical guidance, training, and mentorship to junior administrators and cross-functional teams. * Lead complex projects and initiatives related to Linux and Windows infrastructure. * Contribute to strategic planning and architectural decisions for IT systems. Schedule: 8-hour shift Monday to Friday within Core Hours of 07:00 - 17:00 ## Related Videos - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [WebAssembly: The Next Frontier of Cloud Computing](https://www.wearedevelopers.com/videos/972-webassembly-the-next-frontier-of-cloud-computing) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) - [Docker build without Docker](https://www.wearedevelopers.com/videos/100114-docker-build-without-docker) ## Related Articles - [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) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers)