Patuxent River, Maryland

Where applicable, confirmation that you meet customer requirements for facility access which may include proof of vaccination and/or attestation and testing, unless an accommodation has been approved.

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 Senior System Administrator to join our team in Patuxent River, MD

Responsibilities include, but are not limited to:

  • Maintain/troubleshoot customer Windows based servers, workstations, and related peripherals, both on-site and remotely.

  • Providing IT Systems support on a wide range of technologies, including Microsoft Windows 10 Desktop Operating Systems, Microsoft Windows 2008/2012/2016 Server, DHCP, DNS, Active Directory, Group Policies, administering Microsoft Exchange, and Microsoft Office 2010/2016.

  • Walking customers through problem solving process and follow up with customers to ensure proper incident closure

  • Perform account management duties to include the creation, modification, and deactivation of Windows accounts through Active Directory.

  • Responsibility for investigating and resolving operational problems in conjunction with other engineering and technical personnel.

  • Troubleshooting of basic network issues.

  • Administer network monitoring capabilities using government-provided monitoring tools on large, classified enterprise.

  • Properly evaluate and escalate unresolved tickets to the next level of support

  • Following standard operating procedures; accurately logging all tickets using the defined tracking software

  • Writing and maintaining documentation for supported services, processes, configurations, etc. through Standard Operating Procedures (SOP’s).

  • Providing direction and guidance to less experienced systems engineers.

  • Other duties as assigned

Basic Qualifications:

  • BS or BA degree in a Computer Science or a related scientific discipline or five (5) or more years of relative experience may be substituted for a BS or BA degree.

  • Must possess 3-5 years of experience in a Microsoft Windows dominant administrator position.

  • Must be a self-starter who can take senior-leader guidance and intent and oversee the operations of collaborative and assigned projects.

  • Must be DoD 8570.01-M compliant, IAT II. (CCNA Security, CySA+, GICSP, GSEC, Security+, or SSCP)

  • Must be open to 10% annual CONUS/OCONUS travel and hold a valid US Driver’s License and US Passport.

  • Willingness to work after normal duty hours (nights and weekends) on occasion to support system maintenance or service outages.

  • Must be able to lift at least 40 lbs.

  • Must be able to ascend/descend steep stairs unassisted.

  • Must be able to remain in a stationary position up to 75% of the time

  • Must be able to effectively communicate with co-workers, customers, and management.

Preferred Qualifications:

  • Certification in a Microsoft Windows, Server or Office discipline

  • ITIL Foundations certification

  • Scripting experience or willingness to learn

  • VMware vCenter, Horizon View, HPAC Secure Printing

Security Clearance Requirements:

  • Active Top Secret clearance with SCI eligibility adjudicated within the past 6 years.  Candidate must be open to CI poly.

Physical Requirements:

  • Must be able to remain in a stationary position 50%.

  • Needs to occasionally move about inside the office to access file cabinets, office machinery, etc.

  • Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer.

  • Often positions self to maintain computers in the lab, including under the desks and in the server closet.

  • Frequently communicates with co-workers, management and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations.

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.

Patuxent River, 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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