Senior Systems Administrator

MANTECH•Chantilly, VA

38d•$141,500 - $236,000•Onsite

About The Position

MANTECH seeks a motivated, mission-oriented Senior Systems Administrator to join our team in Chantilly, VA. As a Systems Administrator, Senior, you will be responsible for providing a full range of Tier 2/3 IT support services and expertise to customer activities, as well as coordinating and/or supervising a team of System Administrators. You will play a key role in the management, optimization, and troubleshooting of our VMware virtualized environment and Active Directory infrastructure, ensuring seamless and reliable operations for the organization. You will demonstrate knowledge and understanding of client and server operations and maintenance with Windows 10 and 11 environments and Windows Server 2016/2019, to include Active Directory, Domain Controllers, DNS, GPO’s, PKI, DHCP, VMware v8, Backup Architectures, Storage Management, and Auditing.

Requirements

Bachelor’s Degree and 8 years’ experience, or high school diploma/GED and 12 years of relevant systems administration experience
Experience in performing hardware/software maintenance, repairs, upgrades, full life cycle support, and cybersecurity in an Enterprise IT environment
Knowledge of Windows file and folder permission & inheritance structure
Intermediate knowledge of networking principles and routing protocols
Ability to restore user configurations from backups for continuity of operations
Ability to identify and implement new technologies at scale
Security+ certification (active)
Must possess a current / active TS/SCI with Polygraph

Nice To Haves

Previous NRO and NRO/COMM experience is highly desired
COMSEC experience desired
Ability to use MS Office and PC
Familiarity with PowerShell and command line interfaces
Knowledge of how to detect and correct technical issues impacting system/server performance
Experience with Microsoft Exchange
Experience with Linux/RHEL 8

Responsibilities

Design, implement, and maintain VMware vSphere environments, including vCenter, ESXi hosts, and virtual machines.
Troubleshoot and resolve VMware-related issues, including performance bottlenecks, connectivity problems, and resource allocation.
Manage, monitor, and troubleshoot Active Directory (AD) and Group Policy infrastructure. Administer and support user and group management, including security and distribution groups within Active Directory.
Collaborate with other IT teams to manage system integration, configuration, and upgrades.
Create and maintain comprehensive documentation for systems architecture, processes, and configurations
Domestic Travel up to 25%