ManTech is seeking a motivated career- and customer-oriented **Cyber Security Software Engineer** to join our team in **Dahlgren, VA.** **Job Summary:** This position will focus on developing, maintaining, and enhancing cybersecurity systems. **Responsibilities include but are not limited to:** + Work as a mid-level RPM package maintainer with emphasis on injecting cybersecurity features into pre-existing applications and packaging them for use in DoD applications. + Develop, maintain, and enhance software systems, focusing on Linux systems administration, automation, and scripting, particularly in Python. + Build and maintain C/C++ applications to meet mission requirements. + Work with virtualized environments, including KVM and Xen, to support software development and deployment. + Collaborate with teams to ensure system-level requirements are met, including writing test cases, scenarios, and procedures. + Execute test procedures, analyze results, and produce detailed trouble reports to support system developers and subject matter experts. + Participate in Test and Evaluation (T&E) of cybersecurity systems, with a focus on software certification. **Minimum Qualifications:** + Associate’s Degree in Computer Science, Information Technology, or a related discipline. + Advanced RHEL certification (like RHCE). + A minimum of 6 years of professional experience in software engineering, including: + Experience with Linux systems administration, scripting/automation, and Python programming. + Building and maintaining C/C++ applications. + Experience with virtualized environments (KVM, Xen). + Must possess an active cybersecurity certification to meet compliance with IAT II Cybersecurity Workforce IA requirements (ex. Security+, CISSP, CCNA Security, CySA+, etc.). + The ability to travel to locations within the United States including Dahlgren, VA, Washington DC, Philadelphia, PA to support test events and meetings (up to 20%) **Preferred Qualifications:** + Bachelor’s degree in Computer Science, Information Technology, or a related discipline. + Experience in operations and build toolchains. + Preferred familiarity of Operational Technology, like ICS and SCADA systems. + Strong problem-solving and analytical skills, with the ability to develop and implement innovative solutions. + Ability to work independently as well as in collaborative team environments. **Clearance Requirements:** + Must be a United States citizen with an active Secret clearance, or ability to gain an interim secret clearance. **Physical Requirements:** + Ability to work effectively in a remote working environment. + A dedicated, quiet, and ergonomically appropriate workspace conducive to productivity. + Ability to sit at a desk or workstation for extended periods while working on a computer. + Occasional movement within the office for communication and accessing resources. 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. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran. If you are a qualified individual with a disability and require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please email us at careers@mantech.com and provide your name and contact information.