Cyber Security Engineer IV at SOSi1

SOSi is seeking an experienced Cybersecurity Engineer to join our team at SOS International in Reston, VA. This role strengthens SOSi’s enterprise and customer-facing security posture across on-prem, Microsoft 365/Azure, and multi-cloud environments (AWS, GCP, OCI). You will engineer, implement, and continuously improve controls that protect CUI/FCI and other sensitive data, align with federal frameworks, and enable secure, reliable mission delivery.  In this role you will be part of SOSi’s internal cybersecurity team. Essential Job Duties Classified Systems Leadership (ISSM) • Program Oversight: Lead SOSi Corporate Classified Information Systems and serve as the primary ISSM for all classified spaces. • Compliance Frameworks: Develop and conduct risk assessment procedures to verify RMF/A&A safeguards in accordance with NISPOM/DAAPM, RMF, JSIG, and NIST 800-series (800-53, 800-171) guidelines. • A&A Management: Direct all cybersecurity tasks including Authorization and Accreditation (A&A), risk management, and vulnerability management • eMASS Administration: Utilize the Enterprise Mission Assurance Support Service (eMASS) to record, manage, and track the security posture and RMF lifecycle of various systems. • Authorization to Operate (ATO): Author and maintain critical security documentation, including System Security Plans (SSP) and Security Controls, to obtain and sustain system ATOs. • Remediation: Collaborate with system owners to address Plan of Action and Milestones (POA&M) and conduct continuous evaluations of system security controls.Security Engineering & Architecture • Zero-Trust Implementation: Design and implement security reference architectures for endpoints, networks, identity, and cloud workloads aligned with zero-trust principles. • Cloud Security: Engineer guardrails (policies, blueprints, landing zones), encryption, secrets management, and container security (Kubernetes) across Azure, AWS, GCP, or OCI using Infrastructure as Code (Bicep/Terraform).Threat Detection & Incident Response   • Operations: Tune detections (SIEM/EDR) and manage the end-to-end incident lifecycle: triage, evidence preservation, containment, eradication, and recovery. • Continuous Monitoring: Define audit events, ensure reliable log collection/integrity, and generate compliance reports for leadership and external auditors. • Active Defense: Coordinate with incident response teams to facilitate penetration testing, forensic analysis, and tabletop exercises.Vulnerability & Data Protection • Vulnerability Management: Operate and mature the vulnerability management program (e.g., Qualys), tracking findings through remediation and Change Advisory Board (CAB) control. • Data Safeguarding: Enforce classification/labeling and FIPS-validated encryption for CUI/FCI data at rest and in transit, including secure handling of removable media and sanitization. • Secure Baselines: Implement and maintain secure configuration baselines based on CIS/STIG requirements.