**ManTech** is seeking a motivated, career and customer-oriented **Program Security Officer 1 (PSO 1)** to join our team at our **Chantilly, VA** location to provide unparalleled support to our customer and to begin an exciting and rewarding career within ManTech. The Program Security Officer 1 will assist in providing general security support for a multi-disciplined and complex organization under the supervision of the program security manager. **Responsibilities include, but are not limited to:** + Work security issues with the Directorates and Offices in physical, personnel, operational, technical, information, industrial and information system security + Provide assistance to defense contractors in all industrial security disciplines + Perform Classification Reviews + Review and prepare DD 254s + Review and prepare CDCWs + Coordinate Co-Use Agreements and Memorandums of Understanding + Coordinate and prepare Security Engineering Service Requests per Customer instructions + Provide assistance to defense contractors on personnel security related issues; perform briefings/debriefs, and review program related information for proper markings in accordance with Executive Order 13526 + Other duties as necessary **Basic Qualifications:** + HS Diploma and 4 or more years of relevant experience or Associate’s degree and less than 5 years of experience + Have a working knowledge and be able to implement Intelligence Community Directives as well as NRO Directives and Instructions + Knowledge of the NRO and/or the IC security policies and procedures, tools, databases + Ability to implement Government security requirements for Government and Industry facilities accreditation and information systems certification and accreditation + Demonstrated ability to establish effective working relationships with other Government Agencies and mission partners + Ability to analyze complex information, take appropriate actions, and review and approve recommendations from others + Demonstrated ability to prioritize competing requirements and tasks and managing long-term tasks as well as short-term obligations + General knowledge of general program security processes (badge requests, visit requests, DD254) + General knowledge of ICD 503 and 705 + General knowledge of NISPOM + Demonstrated ability to effectively operate independently or on teams + Demonstrated ability to communicate one-on-one or in large groups and effectively communicate with government personnel + Capable of developing and implementing a specific security task or specialty in support of a SCIF environment + General knowledge of the acquisition lifecycle security requirements + Ability to work high-level, complex or sensitive security issues and with discretion + Ability to handle security classification issues + Ability to identify and assess sources for classification determinations + Travel required up to 25% CONUS **Preferred Qualifications:** + Demonstrated ability in research, analysis and writing + Have outstanding interpersonal skills + Ability to think strategically and tactically + Must be able to multi-task **Security Requirements:** + Must possess an active TS/SCI with Polygraph **Physical requirements:** + Must be able to be in a stationary position 50% of the time + Must be able to communicate, converse, and exchange information with peers and senior personnel + Constantly operate a computer and other office productivity machinery 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.