**ManTech** is seeking a motivated, career and customer-oriented **Cyber Security Engineer, Senior** to join our team in **Chantilly, VA.** **Responsibilities include, but are not limited to:** + Deploys Enterprise Perimeter Protection solutions with focus in cyber security + Engineers and deploys capabilities to provide new functionality, improve system performance/availability, and for generating efficiencies in the maintenance of the operational environment + Provides Tier 3 maintenance support for deployed technologies + Supports Assessment and Authorization activities related to deployed technologies + Identifies potential conflicts with implementation of deployed technologies within the enterprise and develops recommendations to remediate these conflicts + Contributes to the completion of milestones associated with specific projects + Provides solutions to a variety of complex technical problems + Develops plans to safeguard computer files against unauthorized modification, destruction or disclosure **Minimum Requirements:** + Bachelor's Degree or 4+ years of additional work experience in lieu of degree + 5+ years of cyber experience + Experience with network defense technologies in the following areas: Firewalls, IDS/IPS and/or email security + Knowledge of Windows and Linux systems, general operating system security practices, TCP/IP networking, and network security concepts + Must have or be willing to obtain IAT Level II certifications within six (6) months of hire **Preferred Qualifications:** + Experience with the development, engineering, test, sustainment, and overall O&M activities for a secure government system + Experience with F5 and FireEye security products + Experience with Information Assurance concepts and processes + Knowledge of cybersecurity architectural principles such as defense in depth, resilience, and integrated security operations + Knowledge of database and operating system security + Knowledge of defensive cyber operations + Knowledge of fundamental cloud computing concepts + Ability to apply security principles to the systems and enterprise system designs **Clearance Requirement:** + Must possess an active TS/SCI w/ Polygraph **Physical Requirements:** + Must be able to remain in a stationary position 50% + Constantly operates a computer and other office productivity machinery + The person in this position frequently communicates with co-workers, management, and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations 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.