Information System Security Officer (ISSO)

Why Castelion, Why Now Castelion is moving incredibly fast to develop and deliver advanced defense systems at a time when execution matters more than ever. We believe focus, ownership, and excellence are decisive advantages - and we're building a world-class team to turn bold ideas into real capability. This is a rare opportunity to join at an early stage, where you'll have significant ownership, collaborate with exceptional teammates, and make a direct, measurable impact on our mission and the future of the company - regardless of your function. Information System Security Officer (ISSO) Castelion is seeking a classified cyber assurance practitioner to assist the ISSM in driving the Castelion classified cyber assurance program forward. The program focuses on three major areas: Assessment: Assessing the state of the classified cyber assurance program against industry standards, requirements (contractual and regulatory), and organizational needs. Governance: Managing and spearheading governance of the classified cyber assurance program to interpret and drive implementation of industry standards, requirements (contractual and regulatory), and organizational needs. Communications: Be "the face" of classified cyber assurance program to both internal and external stakeholders (e.g. customer, regulatory, government and supplier entities). The successful candidate will assist in driving the classified assurance team to ensure Castelion delivers on customer requirements, reduces risk, and ensures mission success. We are a fast paced, multi-tasking, highly dynamic work environment with high degrees of autonomy and accountability. Responsibilities Assist the ISSM in the completion of the RMF A&A lifecycle process for assigned Castelion classified information systems Ensure compliance with existing regulatory, policy, and contractual requirements as they pertain to Castelion classified information systems Able to identify, triage, and implement new regulatory and contractual requirements into both broad and specific applications Keep apprised of emerging community practices, risks, and threats Plan, prepare for, schedule and coordinate audits, assessments, and tests Identify, evaluate, and select various automation, assessment, and management tool sets to drive effectiveness and efficiencies Provide advanced knowledge of Nessus, Splunk and Security Center tools Provide advanced knowledge of Service Now (SNOW), eMASS, and other GRC tools Build and maintain positive relationships with internal stakeholders, contractual partners, and government customers Successfully further Castelion objectives and initiatives Responsible for auditing all classified information systems Deliver user briefings and agreements in accordance with government requirements Create and maintain data transfer/assured file transfer policies and logs Assist ISSM in record maintenance of all classified network equipment Basic Qualifications Bachelor's degree; OR 3+ years of experience managing cyber assurance for classified computer systems/networks in lieu of a degree 1+ years of experience in cyber assurance Preferred Skills and Experience Demonstrated experience with NRO A&A processes and the JSIG A&A processes Subject matter expertise in the RMF 7 step process Experience working within highly technical and demanding teams and environments Experience with obtaining ATO(s) for networks, weapon systems, and satellite systems Demonstrated experience with COMSEC procedures and practices Exceptional written and verbal communication skills Exceptional organizational skills Demonstrated project management skills, and continued track record of getting things done quickly with high quality Demonstrated record for providing unique and/or novel solutions Demonstrated record of integrating with I.T. and product security functions Ability to perform within mission and time constrained environments High comfort with and acceptance of performing individual contributor functions/tasks Additional Requirements Must be able to work extended hours and/or weekends as needed Ability to travel both locally and domestically DoD IAM Level III eligibility based on active certifications Counterintelligence (CI) scope polygraph (full-scope or lifestyle also acceptable), or ability to successfully complete This position is based in Torrance, CA and requires being onsite - remote work not considered Active Top Secret clearance with SCI eligibility. Castelion offers a generous benefits package. Please refer to the bottom of our Careers page for more details. Other Duties Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice. Additional Eligibility Requirements This position may require access to classified information or restricted U.S. Government sites, systems, or information, as determined by the Company and/or applicable U.S. Government requirements. If the position is so designated, your employment in the role may be contingent upon your ability to obtain and maintain the required U.S. Government security clearance or other government authorization, and to satisfy any citizenship or other eligibility requirements imposed by applicable law, regulation, executive order, or government contract requirements. You will be notified if and when such requirements apply. Affirmative Action/EEO Statement Castelion is an Equal Opportunity Employer. We are committed to providing equal employment opportunities to all applicants and employees without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, genetic information, protected veteran status, or any other characteristic protected by applicable federal, state, or local law. Castelion is committed to providing reasonable accommodations to qualified individuals with disabilities throughout the application and hiring process. If you require a reasonable accommodation to complete an application, participate in the interview process, or otherwise participate in the hiring process, please contact View email address on click.appcast.io. Requests for accommodation will be considered on an individual basis and handled in accordance with applicable law. Castelion is committed to fostering a workplace where employment decisions are based on qualifications, business needs, and the ability to perform the essential functions of the role, with or without reasonable accommodation. EAR/ITAR Requirements This position requires access to export-controlled information, and as such, employment (or hiring of a contractor) is contingent upon the candidate’s ability to access all applicable export-controlled information without additional export licensing being required by the Bureau of Industry and Security and/or the Directorate of Defense Trade Controls.