Springfield, Virginia

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 Software Engineer to join our team in Springfield, VA.

Responsibilities include, but are not limited to:

  • The Senior Software Engineer support the Information Technology (IT) Architecture and Engineering (A&E) team by providing software engineering knowledge, skills, abilities, standard and best practices to implement modern and Next Generation (NexGen) IT solutions leveraging a wide array of vendors and technologies across the full stack: physical, networking, storage, virtualization, servers, applications, and services.

  •  The Senior Software Engineer will primarily be responsible for the detailed design, documentation, coding, code optimization, unit testing, code deployment, and code improvements of both desktop and web-based solutions on Microsoft platforms (i.e., desktops, servers, and web sites) with Microsoft technologies (.NET, ASP.NET, C#, etc.) for multiple internal business/proprietary software products.

  • The Senior Software Engineer directly participates in, and may be asked to personally oversee, the full software development life cycle (SDLC): requirements gathering, analysis, solutions design, development, code reviews, test automation, and implementation using Agile methodologies.

  • The Senior Software Engineer will also ensure all software code is developed and maintained in accordance with U.S. Government (USG) Information Assurance (IA) and Security (INFOSEC) standards, policies and best practices.

Basic Qualifications:

  • Shall have 5 or more years of experience securely developing software products (client applications, web applications, and automation and/or orchestration scripts) using common/standard programming languages for deployment and utilization across an enterprise-level multi-platform (Windows, *nix, etc.) information system.

  • Shall have 5 or more years actively programming and debugging with modem languages to include .NET, ASP.NET, C#, and JavaScript related programs.

  • Shall have 3 or more years of experience directly working with and using relational database technologies.

  • Shall have 3 or more years of experience supporting, maintaining, and documenting software functionality.

  • Shall have 3 or more years of experience working independently within an Agile/Scrum development environment.

  • Demonstrated experience in capturing, analyzing, and decomposing stakeholder and/or product requirements in order to generate design solutions that will be implemented, tested, and eventually transitioned to the operational environment that acknowledge technical, compliance, schedule, and cost constraint.

Education: Bachelor Degree from accredited University

Preferred  Qualifications:

  • Strongly desired to be ISC(2) Certified Secure Software Lifecycle Professional (CSSLP), or be able to obtain CSSLP certification after hiring.

  • Strongly desired to have 5 or more years of experience conducting SDLC analysis to include: software analysis, code analysis, requirements analysis, software review, and identification of code metrics, system risk analysis, security analysis, and software reliability analysis.

  • Strongly desired to have 5 or more years of experience designing, engineering, implementing, and maintaining software developed solutions in secure processing environments which must adhere to U.S. Government Information Assurance and Security standards such as the Defense Information Systems Agency (DISA) Security Technical Implementation Guides (STIGs).

  • Strongly desired to have 3 or more years of experience conducting and evaluating formal software testing and quality assurance.

  • Strongly desired to have 3 or more years of experience writing production-grade software products leveraging Object Oriented and/or Functional Programming skills.

  • Demonstrated experience with additional programming, scripting, and web-based languages to include, but not be limited to, AngularJS, C++, Cascading Style Sheets (CSS), HTML, Java, JQuery, Ruby, Hypertext Preprocessor (PHP), Python, PowerShell, Visual Basic, etc.

  • Demonstrated experience with current development, source code, project management, and version control management tools (i.e., Git, Jira, Subversion).

Clearance Requirement: Top Secret/SCI with counterintelligence (CI) polygraph (in-scope within the past 7 years)

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.

Springfield, Virginia

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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