15726-Systems Administrator 3@ Baltimore, MD

Windows Systems Administrator - Classified Systems

Location: Linthicum, Maryland (Onsite)

Company: Northrop Grumman

Position Overview

Northrop Grumman Mission Systems is seeking a skilled Windows Systems Administrator to support classified infrastructure and enterprise IT environments in Linthicum, Maryland. This role is responsible for administering secure Windows-based systems, supporting virtualization platforms, and ensuring compliance with Department of Defense (DoD) security standards. The selected candidate will maintain system reliability, manage enterprise services, and support mission-critical operations within a secure environment.

Key Responsibilities

• Administer and maintain Windows Server environments, Active Directory, and enterprise domain architecture.

• Manage and support VMware virtualized infrastructure, including high-availability environments.

• Develop and maintain PowerShell scripts and Group Policy configurations.

• Create, deploy, and manage system images within enterprise environments.

• Install, configure, patch, and monitor servers and supporting infrastructure.

• Provide backup, recovery, and storage management to ensure system availability and data protection.

• Manage user accounts, security permissions, and file system access controls.

• Support multiple secure networks and coordinate with system engineers, network teams, and end users.

• Troubleshoot hardware, software, and system performance issues.

• Ensure systems comply with DoD security frameworks and guidelines, including RMF, STIG, and related security requirements.

• Maintain security audit logs and assist with documentation required for classified information systems.

• Document system processes, procedures, and technical configurations.

• Evaluate hardware and software solutions and recommend system improvements.

• Work with vendors and internal teams to resolve technical issues and implement system upgrades.

Basic Qualifications

• Education & Experience:

• Associate's degree with 10+ years of relevant experience, OR

• Bachelor's degree with 8+ years of relevant experience, OR

• Master's degree with 6+ years of relevant experience, OR

• High School diploma with 12+ years of relevant experience may be considered in lieu of a degree.

• Active DoD Secret security clearance with a recent investigation or enrollment in the Continuous Evaluation Program.

• Ability to obtain and maintain Special Access Program (SAP/SAR) clearance.

• CompTIA Security+ CE certification (required to maintain employment).

• Experience managing Windows Server operating systems and domain environments.

• Ability to support multiple networks and perform systems administration tasks independently.

• Ability to lift equipment up to 40 pounds and support after-hours maintenance when needed.

Preferred Qualifications

• Bachelor's or Master's degree in Information Security, Cybersecurity, or related field.

• Experience working in classified DoD environments following NISPOM, RMF, STIG, JSIG, or similar security frameworks.

• Experience installing and maintaining server hardware and networked systems.

• Understanding of network fundamentals, including subnets, routing, and VLANs.

• Experience with Linux operating systems.

• Hands-on experience with VMware virtualization platforms.

• Knowledge of Certification and Accreditation (C&A) processes.

• DoD 8140 certification in Windows or Linux administration.

• Strong communication skills and ability to collaborate with technical and non-technical stakeholders.

Work Environment

This is a full-time onsite role supporting classified systems at the Northrop Grumman campus in Linthicum, Maryland. Candidates must be able to work in secure facilities and adhere to strict information security policies.