Secure our Nation, Ignite your FutureBecome an integral part of a diverse team while working at an Industry Leading Organization, where our employees come first. At ManTech International Corporation, youll help protect our national security while working on innovative projects that offer opportunities for advancement.Currently, ManTech is seeking a motivated, career and customer-orientedLead CNO Developer Test Engineerto join our team in Hanover, MD.Responsibilities include, but are not limited to:As a Lead CNO Developer Test Engineer, you will work in agile environment and leverage your skills in Systems Engineering, Test Engineering, and Networking to devise operational scenarios, performance tests, and support operations.You will be a contributing member of a small multi-disciplinary team and responsible for characterizing system behavior, analyzing performance and contribute to readiness reviews and product release cycles.You must be able to effectively communicate with the technical team, management, and customer to keep them informed of progress, plans and potential issues.You may be expected to collaborate with other organizations and teams to gain the necessary insight to accurately assess system performance.Basic Qualifications:Bachelors Degree or equivalent in Computer Science, Engineering, or Information Technology and 10 to 12 years of relevant experience.Development experience using Python in a CNO environmentExperience testing large scale systems.Experience developing System Test Plans, Requirements Test Verification Matrices and System Test Cases.Experience working with, configuring, and testing embedded systems.Participation in system test readiness reviews and operation readiness reviews.Knowledge of networks and IP subnets/routing is required. Ability to configure network interfaces, set IP addresses and subnets.Experience creating and configuring Virtual Machines to emulate operational environments.Familiarity with basic VLAN/VPN/NAT concepts.Familiarity with signal analysis tools such as Wireshark.Development experience using Python, Ruby, or JavaScript.Familiarity with the Linux operating system.Experience working in an Agile environment utilizing the Atlassian suite.Preferred Qualifications:Experience testing systems that host Real-Time Operating Systems such as VxWorks, Integrity, eCos or POSIX compliant Operating Systems such as Solaris or BSD.Familiarity with SVN or GIT version control systems along with an understanding of basic Configuration Management principles.Experience with network test equipment such as Spirent/Ixia/Xena packet testers.Security Clearance Requirements:Active/Current TS/SCI with Polygraphis required to start6.24.CNO.SC.SB.MF.23For 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.