Senior CNO Test Engineer - Military veterans preferred

ManTech (


  full-time   employee

United States

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 CNO Test Engineer to join our team in the Hanover, MD.

Responsibilities include, but are not limited to:

  • Develop operational test scenarios and produce test artifacts that provide suggestions regarding improvements to the development team.

  • Develop test automation scripts using Python scripts that improve performance testing and aid in the reduction of time to market.

  • Effectively communicate to the technical team, management, and the customer to keep all parties informed of progress, plans and potential problems

  • Collaborate with other organizations and teams to thoroughly exercise the system and verify requirements are satisfied.


  • Bachelor’s degree (or equivalent) in Computer Science or a related field, and 5 to 7 years of relevant work experience

  • Development experience using Python, Ruby, or JavaScript.

  • Experience working with and testing embedded systems.

  • Knowledge of networks and IP subnets/routing is required.

  • Ability to configure network interfaces, set IP addresses and subnets.

  • Familiarity with signal analysis tools such as Wireshark.

  • Familiarity with the Linux operating system.

Preferred Qualifications:

  • Development experience using SmartBear.

  • Familiarity with SVN or GIT version control systems along with an understanding of basic Configuration Management principles.

  • Experience using the Atlassian suite.

Security Clearance Requirements:

  • Active/Current TS/SCI with Full Scope Polygraph

Physical Requirements:

  • Sedentary work that primarily involves sitting/standing/walking/talking and must be able to remain in a stationary position 50%.

  • Moving about to accomplish tasks or moving from one work site to another (at customer site).

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

  • Working with computers.

Our amazing benefits include:
•    Enhanced health benefit package – Apply for more information
•    ManTech HSA contribution
•    25 days PTO plus 10 holidays
•    PTO sellback
•    PTO carryover of up to 240 hours
•    Up to 8% 401k match
•    Up to 4 weeks parental leave
•    Eligibility for annual program bonus
•    Training and conference opportunities including the industry’s leading cyber courses (ACTP)
•    Tuition assistance (selected BS/MS programs are fully paid)
•    Free snacks and monthly social events
•    Very flexible schedule with compensation or flex hours for extra time worked

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.