Herndon, Virginia

All ManTech employees will need to meet the requirements set forth in Executive Order 14042 and the Safer Federal Workforce Task Force Guidance requiring all covered contractor personnel to be fully vaccinated against COVID-19.

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 CNO Developer, Mid-level to join our team in Herndon, VA.

Responsibilities include, but are not limited:

  • Maintains a working knowledge of the customer's requirements for the team product and posses a working knowledge of how the product functions in the larger ecosystem

  • Creates, implements, tests, documents, and supports features and product capabilities and data processing methods that ensure highest levels of information system security

  • Collaborates with Product Owners, Scrum Masters, team leads, and team members to ensure product capabilities that meet or exceed customer requirements

  • Performs maintenance on existing products.

Basic Qualifications:

  • Bachelor's degree in Computer Science, Information Systems or equivalent

  • At least 3 years of experience developing in Java, Kotlin or Spring Boot

  • Demonstrated on-the-job experience documenting program development and subsequent revisions, inserting comments in the coded instruction so others can understand the program.

  • Demonstrated on-the-job experience with identifying complex problems and translating information to form solution options and implement strategies.

  • Demonstrated on-the-job experience developing customized applications to run on a Linux-based system.

  • Demonstrated on-the-job experience with VMWare ESXi or Docker

  • Developing software applications using relational databases (SQL/Postgres) and database persistency using JPA.

Preferred Qualifications:

  • Understanding of Continuous Integration and Continuous Deployment (CI/CD) concepts and experience with Git or Kubernetes

  • Working knowledge of object-oriented design

  • Hands on experience with Linux/Unix, shell scripting, Junit, or Maven

  • Demonstrated on-the-job experience with computer networking, Agile project management principles and processes

  • Experience documenting program development and subsequent revisions, inserting comments in the coded instruction so others can understand the program

Security Clearance Requirements:

  • Must have an active TS/SCI clearance

Physical Requirements:

  • Must be able to remain in a stationary position 50%, capable of operating a computer and other office productivity machinery, and frequently communicate with co-workers, management, and customers

  • Working with Data

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.

Herndon, 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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