Security Engineer

Join to apply for the Security Engineer role at CACI International Inc
.

Job Category:
Information Technology

Time Type:
Full time

Minimum Clearance Required to Start: TS/SCI with Polygraph

Employee Type:
Regular

Percentage of

Travel Required:

Up to 10%

Type of Travel:
Local

CACI enhances the ability of federal government customers to preserve national security, deliver justice and serve the public with advanced technologies and quality analysis. We work closely with agencies and industry to overcome technical and cultural hurdles to innovation, empowering them with the latest end-to-end cloud infrastructure, big data and cyber capabilities. Our expertise in cross-domain and boundary solutions, network analytics, Dev Ops and low-to-high development is unique in our industry.

We develop and deliver innovative products and applications that are deployed in highly sensitive customer environments and have broad applications for federal missions.

We are looking for a proactive and experienced Technical Security Engineer to join our cybersecurity team. As a security engineer, you will play a critical role in designing, implementing, and maintaining security solutions that protect our organization's data, networks, and systems. You will collaborate with cross-functional teams to identify vulnerabilities, ensure compliance with security policies, and respond to incidents. The ideal candidate will have a strong background in system security, threat detection, and network defense, with hands‑on experience in implementing security best practices.

• Implement and manage security technologies including firewalls, intrusion detection/prevention systems (IDS/IPS), endpoint protection, and security information and event management (SIEM) tools.
• Conduct vulnerability assessments, penetration testing, and regular security audits to identify risks and develop mitigation strategies.
• Monitor and respond to security incidents and alerts, performing root cause analysis and incident handling.
• Collaborate with development, IT, and operations teams to integrate security best practices across infrastructure and applications.
• Assist in the creation and maintenance of security policies, standards, and procedures, ensuring compliance with industry standards (e.g., NIST, ISO 27001).
• Manage identity and access management (IAM) solutions to enforce least privilege and role‑based access controls (RBAC).
• Implement and manage encryption solutions to secure sensitive data at rest and in transit.
• Conduct threat modeling and risk assessments to improve the security posture of systems and applications.
• Assist in the development of automated security workflows using scripting (Python, Bash, or similar).
• Keep up with the latest cybersecurity trends, threat landscapes, and vulnerabilities to ensure proactive measures are taken.
• Participate in incident response and disaster recovery planning, testing, and documentation.

Required:

• Three (3) years of experience in Infrastructure Engineering and a Bachelor’s Degree from an accredited college or university in Computer Science or a related discipline, or a Master’s Degree with one (1) year experience, or a Ph.D with zero (0) years experience. In lieu of a Bachelors’ degree an additional four (4) years experience is required for a total of seven (7) years.
• 1-2 years of experience in Python development, including hands‑on coding projects.
• Proficiency in Linux operating system, network security, including firewalls, VPNs, IDS/IPS, and monitoring tools.
• Hands‑on experience with SIEM platforms such as Splunk, QRadar, or similar.
• Knowledge of security frameworks and standards (e.g., NIST, CIS, ISO 27001) and their application.
• Experience with vulnerability management tools (Nessus, OpenVAS, Qualys) and penetration testing tools (Kali Linux, Metasploit).
• Understanding of encryption technologies, identity management, and access controls.
• Familiarity with cloud security best practices for AWS, Azure, or GCP environments.
• Strong scripting skills (e.g., Python, Power Shell, Bash) to automate security tasks.
• Experience responding to security incidents and performing investigations.
• DOD…