Senior Systems Administrator (Windows) - Military veterans preferred

ManTech (


  full-time   employee   contract

Fort George G Meade
United States

Entering ManTech’s 50th year, we hold the distinct honor of being named a “Top 100 Global Technology Company” by Thomson Reuters. We have earned this and many other accolades over the years for our dedication to serving the missions of our nation’s most important customers: U.S. Intelligence, Defense and Federal Civilian agencies. All know us as a trusted partner offering best-in-class solutions in cyber, data collection & analytics, enterprise IT, and systems and software engineering tailored to meet their specific requirements.

Become an integral part of a diverse team in the Mission, Cyber and Intelligence Solutions (MCIS) Group. Currently, ManTech is seeking a motivated, mission oriented Systems Admin(s), in the Hanover, MD area, with strong Customer relationships.

Become an integral part of a diverse team that leads the world in Mission, Cyber, and Intelligence Solutions. At ManTech International Corporation, you will help protect our national security while working on innovative projects that offer opportunities for advancement.

Responsibilities include:
•Windows Administration
•Responsible for all aspects of Windows 2008-2013 Active Directory and server administration for three disparate network domains, with a large user account base. Design and implement Windows 2008/2010-2013 Active Directory domains in secure and often unique environments.
•Build, configure, and maintain Windows Virtual Machines (VMs), and hardens and conducts patch management for Windows systems. Implement and maintain multiple Microsoft WSUS Servers for automated security patches and update management.
•Implement and maintain several Windows DNS servers, and maintain and create Windows security groups and network file shares.
•Establish and maintain trust relationships with external Windows domains, and perform maintenance and performance tuning to ensure health and optimization of all site Windows based servers, resolved complex Windows operating system and software application problems
•Install, configure, and support numerous desktop and server based software applications
•Ensure system integrity is maintained by deploying McAfee ePolicy Orchestrator servers and monitoring anti-virus software updates as well as Microsoft security patches and all Windows based clients and servers
•Deploy workstations with a standardized desktop load and other specialized software applications. Troubleshoot and resolve connectivity issues on various network topologies.
•Patch and update Windows and VM systems.
•Infrastructure Management: Install and configures VMware Infrastructure Server.
•Build new development, test and production environments utilizing Dell Blade servers and VMware.
•Install and configure VMware ESX server on Dell Blades.
•Build Active Directory Domain Servers.
•Install and configure infrastructure related software such as DNS, McAfee EPO Servers, CENTRIFY, LDAP, DHCP, and Linux repositories for patching and updates.
•Perform daily task of all virtual environments to include building new virtual machines, updating DNS and troubleshooting system problems.
•Create documentation for builds and upgrades.
•Install and configure infrastructure applications and support integration with critical application environment.
•Setup and configure VM client systems using VSAN storage, PURE or NETAPP.
•Support Certification and Accreditation of Systems.
•Introduce and integrate new technologies into existing data center environments
•Analyze system logs and identifying potential issues with computer systems.
•Answer technical queries and assist developers and end users
•Troubleshoot any reported problems.
•Apache NiFI experience (add new NiFi nodes, configure NiFi cluster, create and troubleshoot dataflows).
•Scripting (creating new scripts and updating existing for Apps) Desired.
•Tier III support