ManTech seeks a motivated, career and customer-oriented **Principal Cyber Security Engineer** to join our team in **Chantilly, VA.** **Responsibilities include but are not limited to:** + Assume hands-on Cyber engineering and operations responsibilities for an existing IdAM enterprise system + Monitor, troubleshoot, and report system and service performance status + Utilize, monitor, and update ticket management (JIRA, ServiceNow) and collaboration/documentation (GitLab, Confluence) systems + Collaborate with engineering and A&A staff with feature enhancements, security patches, hardening, and associated documentation to maintain security RMF requirements + Provide support for Enterprise Directory Services, Identity Management Services, and Credentialing Services (PKI based Authentication and Authorization), and Enterprise Authorization services + Support routine vulnerability scanning (EVSS), auditing, onboarding, and all systems have up to date security patches + Assist developers with integration and deployment of Identity and Access Management (IdAM) solutions **Minimum Qualifications:** + Bachelor’s degree or 4+ additional years of cyber experience in lieu of degree + 10+ years of combined IT, O&M, sustainment, break-fix, and cloud computing experience + 5+ years of experience working with Linux (RHEL) based operating systems + 3+ years of experience supporting system break-fix activities + 2+ years of experience working with cloud and virtual environments + Experience with PKI, IdAM COTS and customized solutions + Experience with Prior Agile and DevOps **Preferred Qualifications:** + Experience with Oracle IdAM software including: Oracle Access Manager (OAM), F5 appliances, ABAC solutions, and Identity and Access and PKI management concepts **Clearance Requirements:** + Must have a current/active TS/SCI w/Polygraph **Physical Requirements:** + The person in this position 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.