Senior Information Systems Security Officer (Clearance Required)

Location: Fort Meade, MDClearance Required: Top Secret/SCI with Active Full Scope Polygraph (no Conditional Clearance Access/CCA status allowed)Kroll is seeking a highly experienced Senior ISSO-S. The ISSO-S is responsible for leading the development, implementation, and oversight of cybersecurity policies and procedures for complex, classified systems. This role ensures compliance with federal regulations and industry standards, manages risk, and supports the system lifecycle from design through decommissioning.Security Governance & ComplianceDevelop, implement, and maintain security policies, procedures, and protocols.Ensure compliance with NIST SP 800-53, RMF, FISMA, JSIG, DAAPM, and other applicable frameworks.Lead efforts to achieve and maintain Authority to Operate (ATO).Risk Management & AssessmentConduct risk assessments and vulnerability scans using tools like ACAS, SCAP, and STIGs.Manage POA&Ms and ensure timely mitigation of identified vulnerabilities.Oversee configuration management and change control processes.System Lifecycle SupportIntegrate security requirements into the System Development Lifecycle (SDLC).Maintain and update System Security Plans (SSPs) and other authorization documentation.Register and manage systems in eMASS or equivalent platforms.Incident Response & MonitoringCoordinate cybersecurity incident response and reporting.Monitor system logs and network traffic for anomalies.Investigate security breaches and recommend corrective actions.Collaboration & LeadershipServe as a key advisor to system owners and stakeholders.Collaborate with ISSMs, ISSEs, PMs, and AOs to ensure security posture is maintained.Provide security awareness training and guidance to users.Your recruiter will be happy to walk you through your U.S.-specific benefits, which include:Healthcare Coverage: Comprehensive medical, dental, and vision plans.Time Off and Leave Policies: Generous paid time off (PTO), paid company holidays, generous parental and family leave.Protective Insurances: Life insurance, short- and long-term disability coverage, and accident protection.Compensation and Rewards: Competitive salary structures, performance-based incentives, and merit-based compensation reviews.Retirement Plans: 401(k) plans with company matching.Please note that benefits may vary by region, department and role. We encourage you to speak with your recruiter to learn more about the specific benefits available for your position.About Kroll Join the global leader in risk and financial advisory solutions—Kroll. With a nearly century-long legacy, we blend trusted expertise with cutting-edge technology to navigate and redefine industry complexities. As a part of One Team, One Kroll, you'll contribute to a collaborative and empowering environment, propelling your career to new heights. Ready to build, protect, restore and maximize our clients’ value? Your journey begins with Kroll. In order to be considered for a position, you must formally apply via careers.kroll.com.We are proud to be an equal opportunity employer and will consider all qualified applicants regardless of gender, gender identity, race, religion, color, nationality, ethnic origin, sexual orientation, marital status, veteran status, age or disability.The current salary range for this position is $100,000 to $150,000#LI-CN1Full timePosting Date: 2026-06-02