Washington, District Of Columbia

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 Systems Engineer to join our team in Washington DC.

Responsibilities include, but are not limited to:

  • Designing, implementing, and documenting technology solutions in a wide variety of application and/or service areas, including client/server solutions, VDI solutions, client/server applications, and new technologies as identified by the customer

  • Solutions include developing full ITIL Service Design Packages, including documenting requirements, creating SLAs, developing Capacity Management plans, IT Service Continuity Plans, and other areas composing ITIL service design

  • Designing and deploying enterprise level disaster recovery solutions

  • Designing and deploying enterprise class SAN deployments and backup infrastructures, including Data-at-Rest

  • Designing and deploying new applications and services to the infrastructure

  • Writing implementation and design documents describing how security features are implemented

  • Participating in a Change Management processes

  • Providing IT Systems and Applications Engineering support for a large, distributed IT infrastructure.

  • Providing direction and guidance to less experienced systems engineers. 

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

  • Providing IT Systems Engineering support on a wide range of technologies, including Microsoft Exchange, Microsoft SharePoint, Microsoft SQL Server, Microsoft Office, Internet Explorer, Adobe Acrobat, HBSS, Splunk, customer line-of-business applications, VMware vCenter, HP Secure Printing, HP Blade Servers, HP SANs, Certificate Services, DHCP, DNS, Active Directory, Group Policies and Microsoft Windows and Red Hat Linux Operating Systems.

  • Other tasks may include requirements specification, performance modeling, end-to-end functional analysis, cost estimation, and joint application design.  

  • Participate in technology evaluation and reengineering teams to support strategy-definition and continuous process improvement activities

  • Provide SME input to the customer and PM in support project.

  • Participate in the design, implementation, and management of workload automation initiatives

  • Adhere to firm Change Management, Problem Management policies and familiarity with ITIL or other formalized IT operations foundations

  • Participating in processes throughout all phases of ITIL Service Lifecycle, including submitting Change Requests

Basic Qualifications:

  • Bachelor’s Degree in an IT or STEM field or equivalent experience and 7 to 12 years of relevant IT experience

  • 7+ years of experience as an enterprise systems engineer in a client or server environment, including deployment automation tools

  • DoD 8570 IAT Level 2 certification required (CCNA Security, GICSP, GSEC, Sec+, CND or SSCP)

  • DoD 8570 computing environment certification within 6 months of hire. 

  • Extensive knowledge of Windows based systems including Hardware, software, networking, and storage

  • Proficiency in PowerShell and/or other scripting languages

Preferred Qualifications:

  • Certifications such as MCSE: Core Infrastructure, VMware: VCTA – CMA, Red Hat RHCA, RHCE, or RHCA

  • Juniper Router Switch experience a plus

  • Willingness to work after normal duty hours (nights and weekends) during scheduled maintenance windows 1 to 2 times a month on average

Security Clearance Requirements:

  • US Citizenship required and active TS-SCI clearance adjudicated within the last 6 years

  • Candidate must be open to CI poly

Physical Requirements:

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

  • Must be able to move about inside the office and datacenter to access IT equipment

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

  • Must be able to observe and detect employee deviations from established policy

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 http://www.mantech.com/careers/Pages/careers.aspx as a result of your disability. To request an accommodation please click careers@mantech.com and provide your name and contact information.

Washington, District Of Columbia

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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