Senior Test Engineer

Mantis Security Corporation
Reston, VA


Mantis Security is a leading specialty firm of high caliber talent who specialize in Cyber Operations, Cyber Defense, Information Assurance, Software Development, DevSecOps, Security Engineering, and Cloud Engineering. We enable and protect our nation's most important IT assets and invest in the long-term career development of every employee! We are currently looking for the next Senior Test Engineer to join our team of experts!

Position Description:
Seeking an experienced Test Engineer to join our SITE III Directorate Operations (DO) team supporting the U.S. Intelligence Community. This role supports web applications focused on CI/HUMINT for the worldwide IC.

Key Responsibilities:
• Standard Setting: Establish and uphold integration and testing standards.
• Test Strategy: Develop and implement test strategies to ensure system reliability.
• Stakeholder Coordination: Coordinate with various organizations for integration and testing activities.
• System Readiness: Prepare and assess readiness for system activities.
• Process Implementation: Ensure compliance with testing processes and track metrics.
• Discrepancy Management: Evaluate reports and validate fixes affecting systems.
• Test Procedures: Prepare system test procedures and user acceptance procedures following defined standards.
• Agile: Operate in a fast-paced, Agile development environment as part of the scrum team.

Required Qualifications:
• A Bachelor’s degree in an area applicable to the position with 10+ years of relevant experience OR a Master’s degree in an area applicable to the position with 8 years of relevant experience; an additional 4 years of experience maybe considered in lieu of a degree requirement
• Active TS/SCI or SCI eligibility and active polygraph or ability to obtain a polygraph
• Experienced tester, front end, back end, middle tier. Development environments include Java, Wildfly, Openshift, Docker, Jenkins, Git, Redmine, Artifactory, Postgres, some Cloud technologies (such as S3 and ElastiCache), and Oracle.
• Knowledge of Agile processes is required.
• The candidate must have recent experience in some of these key areas and be willing/able to be in lead tester positions for Agile scrum teams.

Desired Qualifications:
• Extensive knowledge and experience with software testing Experience using Gitlab
• Experience with Agile
• Experience interacting with the end users and functional customer in support of sprint reviews, sprint demos and In-Plant Acceptance testing is preferred but not required

We believe that our strength is in our employees. We offer employees the chance to work with great people on projects of high importance and are committed to providing the best culture that fosters technical innovation and personal growth. To help our staff achieve a productive work-life balance, we offer a full range of highly competitive benefits for our employees and their families. For more information visit our website at

Posted 2026-03-07

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