ManTech seeks a motivated, career and customer-oriented Information System Security Officer ISSO to join our team in the Chantilly, VA area. A qualified mid level ISSO will ensure that the appropriate operational security posture is maintained for assigned information systems and as such, works in close collaboration with the Information System Security Manager ISSM. Ensure that cyber security requirements are effectively integrated into information systems’ operations, management, and documentation. Provide critical systems, application and infrastructure support to the customer and work with a team across multiple technical areas to include security and systems administration. **Responsibilities include, but are not limited to:** + Coordinate with government information system owners and industry partners to maintain compliance of information systems with customer requirements to include supporting ICD503 Assessments and Authorizations of industry partners’ systems. + Support the Assessment and Authorization of information systems by performing risk assessments, preparing and reviewing documentation in accordance with the Risk Management Framework (RMF), identify deficiencies an provide recommendations for solutions, track Plan of Action and Milestones (POA&M) through mitigation and risk acceptance, and conduct weekly, monthly, and annual Continuous Monitoring (CONMON) activities. + Implement vulnerability management programs, including tracking and addressing IAVAs and security patches, accessing applicability to existing systems, and ensuring closure. + Perform data transfers between air-gapped systems at varying classification levels using tools for virus and dirty word scanning in accordance with media control and data transfer policies + Assess and respond to security-related incidents, alerts, and requests to include software requests. + Prepare systems and components for disposal and assist industry partners with disposal of equipment. + Domestic travel up to 25% **Minimum Qualifications:** + Bachelor’s degree and 8 or more years of relevant information system security experience. + Familiarity with information system security principles. + Experience with interfacing and briefing military, civilian, and contractor personnel at all levels. + Knowledge of security-related IC and DoD policies, procedures and operating instructions. + One of the following certifications required Information Assurance Management (IAM) Level I: CAP, GSLC, CISM, CASP, CISSP, CCISCO, Security+. **Preferred Qualifications:** + Experience with Insider threat is highly desired. **Security Clearance Requirements:** + Must have a current / active TS/SCI with Polygraph **Physical requirements:** + Must be able to be in a stationary position more than 50% of the time + Frequently communicates with co-workers, management, and customers, which may involve delivering presentations + Needs to occasionally move about inside the office to access file cabinets, office machinery, etc. 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.