Senior Cloud Information System Security Engineer

Requisition #: R70419Locations: USA-DC-Washington, USA-AL-HuntsvillePosting Date: 09/02/2026Security Clearance Required: TS/SCIRemote Type: OnsiteTime Type: Full timeContact Email: View email address on click.appcast.io: Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we’ve been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now—unleash your potential with MANTECH!***This is for a future opportunity***MANTECH seeks a motivated, career- and mission-focused Senior Cloud Information Systems Security Engineer (ISSE) to join our team in Washington, D.C. or Huntsville, AL. This is an onsite position. Responsibilities include but are not limited to: Lead, mentor, act as a SME (Subject Matter Expert) and supervise a team of contractor security professionals responsible for the end-to-end implementation of the Risk Management Framework (RMF) lifecycle for FBI IT systems. Oversee and coordinate activities within the Prepare step, ensuring roles, responsibilities, and risk management strategies are clearly defined and maintained. Guide system categorization efforts to ensure all information systems are appropriately classified based on mission/business impact and regulatory requirements. Advise on the selection, tailoring, and documentation of security controls aligned with system categorizations, Bureau risk appetite, and compliance requirements. Oversee the implementation of technical, operational, and management controls throughout system and application lifecycles, with a particular focus on quality and completeness of all deliverables. Ensure comprehensive security control assessments are planned, executed, and documented to validate the effectiveness of implemented safeguards. Serve as a principal technical advisor on cybersecurity, bringing subject-matter expertise to risk analysis, incident response, system remediation, and audit support efforts. Minimum Qualifications: 10 + years of experience in secure design, analysis, and test of information security systems and products. 10 + years of experience applying methods, standards, and approaches for ensuring baseline security safeguards are appropriately implemented and documented. 10 + years of experience creating and updating security test plans for detecting and mitigating risk to information systems. Bachelor's degree or equivalent (6 additional years of experience) or Master's degree with 7 + years of relevant experience.Must possess one of the following DoD 8140.03 Advanced proficiency certifications: CCISO, CISA, CISM, CISSP, CISSP-ISSEP, CISSP-ISSAP, CySA+, GSLC, GSNA, CCNP Enterprise, GCIA, GDSA, or GICSP.Preferred Qualifications:Possession of a Cloud certification (e.g., AWS Certified Security - Specialty, CCSP, AWS Solutions Architect Associate, AZ-500, or Google Professional Cloud Security Engineer). Demonstrated experience leading RMF lifecycle teams across cloud and hybrid enterprise environments. Experience with DOJ/FBI GRC applications such as Xacta or JCAM. Clearance Requirements:Active Top Secret clearance with SCI eligibility is required. Physical Requirements: Must be able to remain in a stationary position 50% of the time. Needs to occasionally move about inside the office to access file cabinets and office machinery. Frequently communicates with co-workers, management, and customers, and must be able to exchange accurate information in these situations. MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.If you need a reasonable accommodation to apply for a position with MANTECH, please email us at View email address on click.appcast.io and provide your name and contact information.