Annapolis Junction, Maryland

Secure our Nation, Ignite your Future

Become an integral part of a diverse team while working at an Industry Leading Organization, where our employees come first.  At ManTech International Corporation, you’ll help protect our national security while working on innovative projects that offer opportunities for advancement.

Currently, ManTech is seeking a motivated, career and customer-oriented Windows Subject Matter Expert – L3-Sr to join our team in Annapolis Junction, MD.

Responsibilities include, but are not limited to:

  • This position supports an IT operations environment. The successful candidate should expect to support work on nights and weekends and may be included in an on-call rotation for after-hours support.
  • In coordination with the team of Windows System Administrators, architect and design the environment to automate processes to install, configure, and maintain Windows Operating Systems (OS). The successful candidate will be able to analyze and resolve problems associated with the operating system, hardware, architecture, applications, and software. They detect, diagnose, and report Windows related problems on servers.  They must possess expertise with varied concepts, standard best business practices, and procedures and rely on experience and judgment to plan and accomplish goals. They are expected to perform a variety of tasks without supervision.
  • Provide Subject Matter Expertise for the following services supported by the team in a multitenancy environment: Active Directory (AD), System Center Configuration Manager (SCCM), Virtualized Machines in Hyper-V and VMware running Windows OS (Includes Virtual Desktops and Servers)
  • Responsible for the security and management of Windows servers and desktops in non-production and production environments
  • Solve complex integration and technical problems in a dynamic fast-paced environment
  • Work with other Systems Administrators, DBAs, and application developers to resolve various system issues
  • Requires 24x7 on call support on a rotating basis

Basic Qualifications:

  • Microsoft Certified Solutions Associate (MCSA) AND Microsoft Certified Solutions Expert (MCSE) or replacement Microsoft certification
  • Expert with design, installation and configuration of Windows operating systems and applications to include Server 2012R2, Windows Server 2016 and Windows 10 machines
  • Expert with design, installation, configuration and management of Virtual Desktop Infrastructure to include Hyper-V
  • Ability to architect and design an AD transformation to maximize the efficiency of the AD implementation,
  • Expert in troubleshooting servers, workstations, and user experience issues with various COTS and Custom applications
  • Expert with SCCM for software patch management in a multi-tenancy environment
  • Knowledge and experience working with TOMCAT, McAfee, SolarWinds and NetBackup applications
  • Ability to architect, develop, and maintain documentation reflecting the current operational environment and any future state operational environments
  • Possess excellent communication and written skills
  • A Bachelor's degree or equivalent in Computer Science, Information Systems, Engineering, Business, or other related scientific or technical discipline with 10 or more years related professional experience. (Education can be substituted for 9 years of experience).

Preferred Qualifications:

  • Experience with Perl/Shell Scripting
  • Experience with SAN or Network storage setup/administration
  • ITIL Certification

Security Clearance Requirements:

  • Active DOD Secret clearance and ability to obtain agency suitability clearance

Physical Requirements:

  • Must be able to type

For all positions requiring access to technology/software source code that is subject to export control laws, employment with the company is contingent on either verifying U.S.-person status or obtaining any necessary license. The applicant will be required to answer certain questions for export control purposes, and that information will be reviewed by compliance personnel to ensure compliance with federal law. ManTech may choose not to apply for a license for such individuals whose access to export-controlled technology or software source code may require authorization and may decline to proceed with an applicant on that basis alone.

ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment because of race, color, sex, religion, age, sexual orientation, gender identity and expression, national origin, marital status, physical or mental disability, status as a Disabled Veteran, Recently Separated Veteran, Active Duty Wartime or Campaign Badge Veteran, Armed Forces Services Medal, or any other characteristic protected by law.

If you require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please contact ManTech's Corporate EEO Department at (703) 218-6000. ManTech is an affirmative action/equal opportunity employer - minorities, females, disabled and protected veterans are urged to apply. ManTech's utilization of any external recruitment or job placement agency is predicated upon its full compliance with our equal opportunity/affirmative action policies. ManTech does not accept resumes from unsolicited recruiting firms. We pay no fees for unsolicited services.

If you are a qualified individual with a disability or a disabled veteran, you have the right to request an accommodation if you are unable or limited in your ability to use or access as a result of your disability. To request an accommodation please click and provide your name and contact information.

Annapolis Junction, Maryland

ManTech was founded in 1968 to provide advanced technological services to the United States government. We began with a single contract with the U.S. Navy to develop war-gaming models for the submarine community. Over the years, our government's technology needs have increased dramatically in scope and sophistication, and we have grown to meet that challenge.


For more than 4 decades, we kept a careful eye on where emerging technologies were taking the government, and we developed the resources to master those technologies—by staying close to our customers and anticipating their needs, hiring talented professionals to propel us into the future, and acquiring companies with proven capabilities.


Today, we are a multi-billion-dollar public company that provides the innovation, adaptability, and critical thinking our government needs for success in defense, intelligence, law enforcement, science, administration, health, and other fields—throughout the nation and in many countries throughout the world. We are now applying the lessons learned in the unforgiving arena of national security to help the private sector protect networks and critical information.

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