Senior Systems Administrator

Company: GD Information Technology
Location: Germantown
Posted on: April 1, 2026

Job Description:

Type of Requisition: Regular Clearance Level Must Currently Possess: None Clearance Level Must Be Able to Obtain: None Public Trust/Other Required: None Job Family: IT Infrastructure and Operations Job Qualifications: Skills: Linux, Microsoft Windows, System Administration Certifications: None Experience: 5 years of related experience US Citizenship Required: Yes Job Description: Senior Systems Administrator Own your opportunity to join our team, bringing professionalism and initiative to a fast-paced environment that offers extensive options for training, certification, and career advancement. When we succeed, you succeed and together our best becomes better. GDIT has an immediate opening for a Systems Administrator to fill a Core Services position supporting the NNSA (National Nuclear Security Administration). The Systems Administrator is responsible for supporting core service functions covering Server, Storage End Point Security (ESS), E-discovery, Microsoft Endpoint Configuration Manager (MECM), Monitoring Tools, Storage, and VMware teams. WHAT YOU WILL DO: Duties and Responsibilities: Enterprise Authorization: Integrate Linux Systems into a primary Windows environment (workstations & servers) where authentication, authorization, and accounting actives are controlled by Active Directory with PKI certificates and Single Sign On. Enterprise Provisioning: Configure new Linux and Windows systems for customer use and ensuring that initial configurations meet the required enterprise baselines & controls (e.g., proper agents installed, proper configs, etc.) Integrate Linux and Windows systems with other enterprise tooling (e.g., ACAS, Splunk, SolarWinds, Backup systems, etc.). Ensure patches are maintained across a diverse Linux environment in a heavily automated manner, where possible. Ensure that already-provisioned Servers are kept in compliance with baseline requirements & ever-changing enterprise policy (e.g., equivalent to Group Policy in the Windows realm for ongoing compliance update. Provide technical support to the administration of enterprise Storage systems including Hyperflex, NAS and SAN platforms. Provide technical and administrative support to system backups, ensuring all backups are completing as scheduled and the system ins operating in an optimized manner. Develop an operating system lifecycle plan with integration of NNSA STIGs and other recommended security standards. Monitor all solutions integrated via a centralized alerting system. Certify log management and forwarding to a single repository. Serves as a technical expert for the development, implementation, management, and support of systems and networks. Plans and execute complex assignments, developing new methods and approaches in a wide variety of IT specialties. Maintains group policy, AD directory structure, and deployment of policies. Provides domain-level configuration, administration, operation, and support for the enterprise. Supports hardware and software management; uses, monitors, and manages a software license repository, across the enterprise, for recording and tracking software licensing/support agreements. Provides configuration management support in accordance with compliance and policies and procedures. Perform account management, e.g. establishing, activating, modifying, disabling, and removing accounts. Provide configuration management, implementation, and sustainment of compliance with applicable system security controls. Provide support to IT systems including day-to-day operations, monitoring and problem resolution for all the client/server/storage/network devices, mobile devices, etc. Optimize system operations and resource utilization, and perform system capacity analysis and planning. Provide in-depth experience in trouble-shooting IT systems. Education and Certifications: Bachelor’s degree in computer science, Information Technology, or a related field (or equivalent work experience) or Technical Training, Certifications, and 8 years of experience. Required Skills: At least 5-7 years of experience as a Systems Administrator or similar role Strong experience with Linux and Windows-based systems administration. Knowledge of cloud platforms (AWS, Azure, Google Cloud). Experience with virtualization technologies (VMware, Hyper-V). Familiarity with containerization technologies like Docker and Kubernetes is a plus. Experience with system monitoring tools (e.g., Nagios, Zabbix, SolarWinds). Experience with Backup strategies and industry tools such as Commvault Knowledge of scripting languages (e.g., PowerShell) for automation tasks. Strong troubleshooting and problem-solving abilities. Solid understanding of networking protocols and concepts (DNS, DHCP, TCP/IP, VPN, etc.). Expert knowledge and experience in current Windows client server to include OS configuration, file sharing, DNS, DHCP, and Active Directory. Experience granting permissions, group policy, responding to trouble tickets Optimize system operations and resource utilization. Implement ongoing system security compliance measures including patches and updates. Knowledge and demonstrated experience and its implementation using VMware vSphere (vCenter/ESXi) and Horizon View (VDI Desktops). Practical experience in implementing and maintaining virtualization (VDI Desktops). Security Clearance Level: DOE Q or TS • Random Drug Screening • Required Skills and Abilities: Written and Oral Communication; Organization, Problem Solving, Communication, and Teamwork. • Location: Washington DC, Germantown, MD, or Albuquerque, NM - 100% onsite with our customer • US Citizenship Required Desired Certifications: Microsoft Windows Hybrid Administrator ITIL 4 Foundation Certification Microsoft Certified: Azure Administrator Associate Red Hat Certified Engineer (RHCE) VMware Certified Professional (VCP) GDIT IS YOUR PLACE At GDIT, the mission is our purpose, and our people are at the center of everything we do. ? Growth: AI-powered career tool that identifies career steps and learning opportunities ? Support: An internal mobility team focused on helping you achieve your career goals ? Rewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time off ? Community: Award-winning culture of innovation and a military-friendly workplace OWN YOUR OPPORTUNITY Explore an enterprise IT career at GDIT and you’ll find endless opportunities to grow alongside colleagues who share your desire to drive operations forward. The likely salary range for this position is $96,569 - $130,651. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range. Scheduled Weekly Hours: 40 Travel Required: Less than 10% T elecommuting Options: Onsite Work Location: USA DC Washington Additional Work Locations: USA MD Germantown Total Rewards at GDIT: Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most. We are GDIT. A global technology and professional services company that delivers consulting, technology and mission services to every major agency across the U.S. government, defense and intelligence community. Our 30,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50 countries worldwide, offering leading capabilities in digital modernization, AI/ML, Cloud, Cyber and application development. Together with our clients, we strive to create a safer, smarter world by harnessing the power of deep expertise and advanced technology. Join our Talent Community to stay up to date on our career opportunities and events at gdit.com/tc . Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans

Keywords: GD Information Technology, West Allis , Senior Systems Administrator, IT / Software / Systems , Germantown, Wisconsin