**MANTECH** seeks a motivated, career and customer-oriented **Senior Cyber Security Detections Engineer** to join our team in **Springfield, VA.** This role supports our Cyber Operations mission by providing critical detection and response capabilities. You will be part of an industry-leading organization where employees come first, and you'll help defend national security while working on rewarding projects with room for growth and innovation. **Responsibilities include but are not limited to:** + Formulating and publishing custom Security Information and Event Management (SIEM) tool content and IDS/IPS signatures to address threats + Performing security event and incident correlation using information gathered from a variety of sources within the enterprise + Analyzing and assessing damage to the data/infrastructure as a result of cyber incidents + Performing cyber incident trend analysis and reporting + Characterizing and analyzing network traffic and system data to identify anomalous activity and potential threats to resources + Providing detection, identification, and reporting of possible cyber-attacks/intrusions, anomalous activities, and misuse activities + Creating, deploying, and implementing threat-based signatures and detection rules for operational intrusion detection capabilities **Minimum Qualifications:** + Bachelor’s degree or 4+ years of additional cyber experience in lieu of a degree + 5+ years of related cyber experience + Experience with modern Windows, UNIX, network operating systems, databases, and virtual computing environments + DoD 8570 certification meeting IAT Level II (e.g., GSEC, Security+, SSCP, or CCNA-Security) + Knowledge of counter-measures or mitigating controls + Experience with enterprise security tools, including SIEMs, Threat Intelligence Platforms (TIPs), or network monitoring tools + Proficiency in creating, modifying, tuning IDS signatures/SIEM correlation searches and other detection signatures **Preferred Qualifications:** + Advanced skills in Linux/Unix (command line user—proficient and used in the last 6 months) **Clearance Requirements:** + Must have a current/active TS/SCI with Polygraph **Physical Requirements:** + Must be able to remain in a stationary position 50% of the time + Occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers via email, phone, and/or virtual communication, which may involve delivering presentations 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.