Senior Systems Administrator

Arlluk Technology Solutions, LLC a Koniag Government Services company, is seeking a Senior Systems Administrator with a Top-Secret security clearance to support ATS and our government customer in Winchester, VA.

Benefits include medical, dental, and vision insurance, 401(k) retirement plan, paid time off, paid parental leave, life and disability insurance, flexible spending accounts, commuter benefits and tuition reimbursement.

We are seeking an experienced Senior Systems Administrator to support and maintain a hybrid infrastructure consisting of Windows and Linux servers, end-user workstations, cloud resources, virtualization platforms, networking components, storage systems, and business applications. This position will be responsible for administering approximately 135 servers and desktops while supporting both cloud-hosted and on-premises technologies.

The ideal candidate will have a strong Windows administration background, practical experience with automation and scripting, and the ability to troubleshoot complex issues across the network, hardware, operating system, database, and application layers. This role requires a hands‑on professional who is comfortable learning new technologies, working independently, and supporting a diverse technical environment.

• Administer and maintain Windows Server environments, including Active Directory, Group Policy, DNS, user accounts, security groups, permissions, and related enterprise services.
• Manage the configuration, patching, and ongoing support of approximately 135 servers and desktop systems.
• Develop and maintain Power Shell scripts used for application deployment, system configuration, patching, administration, and task automation.
• Perform software installations and updates across server and desktop environments using Power Shell-based deployment methods.
• Support Linux systems, including manually installing RPM packages, modifying configuration files, managing services, reviewing logs, and performing general troubleshooting.
• Assist with the configuration and support of Docker‑based applications and environments.
• Perform basic installation, configuration, maintenance, and troubleshooting of Microsoft SQL Server.
• Execute basic SQL queries, review database information, and assist application teams with database‑related troubleshooting.
• Provide basic support for MongoDB environments hosted on Linux, when required.
• Support physical and virtual infrastructure, including desktops, servers, storage area networks, and associated network components.
• Maintain and administer a VMware environment consisting of a three‑node cluster and VMware vCenter.
• Create and maintain virtual machine templates, deploy new virtual machines, and patch and manage the VMware vSphere environment.
• Build and maintain custom Windows desktop images using Microsoft Deployment Toolkit and Windows Deployment Services.
• Perform bare‑metal imaging and deployment of desktop systems.
• Support AWS infrastructure and troubleshoot application connectivity within and external to the AWS environment.
• Review and modify AWS security groups, network access control lists, routing tables, and related network configurations.
• Assist with automating AWS administrative and operational tasks using Python or other scripting tools.
• Diagnose system and application performance problems and identify whether bottlenecks originate from the network, hardware, operating system, database, virtualization, cloud, or application layer.
• Document system configurations, administrative procedures, deployment processes, troubleshooting activities, and environment changes.
• Collaborate with application developers, database administrators, network engineers, security personnel, and other technical stakeholders.
• Sup…