Security Engineer

CACI International•Washington, DC

7d•$90,300 - $189,600

About The Position

CACI is seeking a dedicated Security Engineer to support the Department of Homeland Security (DHS) Office of the Inspector General (OIG). This role offers a unique opportunity to safeguard cutting-edge AI and data analytics capabilities that strengthen national security oversight through investigative, audit, and inspection operations. As a Security Engineer, you will design, implement, and maintain comprehensive security controls that protect sensitive investigative data, ensure compliance with federal security requirements, and enable secure AI and analytics capabilities. You will implement role-based access controls, encryption, logging and monitoring infrastructure, and data protection measures across AI applications, enterprise data platforms, and cloud infrastructure. From integrating with SIEM tools and enforcing controls for Law Enforcement Sensitive (LES) data to supporting Authority to Operate (ATO) processes and conducting security testing, you will be the guardian of data security and compliance. Working within Azure Government environments, you will ensure that transformational AI and data capabilities meet the highest standards of federal cybersecurity. Join us to make a meaningful impact by securing mission-critical systems on a program of national importance.

Requirements

Bachelor's degree + 7 years of experience in cybersecurity, information security, security engineering, or related field; equivalencies considered (Master's + 4 years; 13 years with no degree; AA + 9 years)
Must be able to obtain DHS / EOD Clearance.
Proven experience implementing security controls, access management, encryption, and logging/monitoring solutions for enterprise applications and cloud infrastructure
Strong understanding of federal security requirements including NIST 800-53, FedRAMP, FISMA, and experience supporting Authority to Operate (ATO) processes and continuous monitoring programs
Hands-on experience with cloud security in Azure (or AWS/GCP) including identity and access management (Entra ID/Azure AD), network security, encryption services, and security monitoring tools
Demonstrated experience with SIEM platforms, log analysis, security monitoring, intrusion detection, and incident response practices

Nice To Haves

Experience securing AI/ML applications, data analytics platforms, or sensitive data environments in federal government, law enforcement, or national security contexts with understanding of investigative data handling requirements
Hands-on experience with Azure Government or other secure government cloud environments (AWS GovCloud) including implementation of security controls for FedRAMP High or DoD Impact Level environments
Professional security certifications such as CISSP, CEH, GIAC (GSEC, GCIH, GCIA), Security+, or equivalent demonstrating advanced security knowledge and commitment to the profession

Responsibilities

Design, implement, and maintain comprehensive security controls including application and infrastructure logging, access controls, audit trails, encryption, and least-privilege access policies across AI platforms, data environments, and mission applications
Implement and enforce role-based access controls (RBAC), data security policies, and protective measures for sensitive data including Sensitive Personally Identifiable Information (SPII), Law Enforcement Sensitive (LES), and For Official Use Only (FOUO) data consistent with DHS OIG policies
Integrate applications, data platforms, and cloud infrastructure with OIG-approved Security Information and Event Management (SIEM) systems and log aggregation tools to enable security monitoring, alerting, and incident response
Monitor and analyze security logs, access patterns, and user behavior to detect unauthorized access attempts, anomalous activity, data exfiltration risks, and potential security incidents across all platform layers
Support Authority to Operate (ATO) processes including security control implementation documentation, security testing coordination, vulnerability assessment, remediation evidence preparation, and ongoing compliance monitoring aligned with NIST 800-53 and FedRAMP requirements
Perform comprehensive security testing including vulnerability assessments, penetration testing coordination, secure code review, configuration assessments, and validation that pilot applications and production systems meet security requirements
Implement application-level security controls including input validation, output encoding, authentication/authorization mechanisms, session management, secure API design, and protection against OWASP Top 10 vulnerabilities
Provide specialized forensic analysis and incident response support including server/virtual machine reconstruction, security-focused data analysis, digital evidence preservation, and technical declarations for investigative or administrative matters
Coordinate with DHS OIG cybersecurity teams, privacy officers, DevSecOps teams, and Authorizing Officials to ensure integrated security posture, compliance with enterprise security policies, and alignment with continuous monitoring programs
Develop and maintain security documentation including security architecture diagrams, control implementation evidence, configuration standards, incident response procedures, and security knowledge transfer materials