Information Systems Security Officer

Job Title:

Information Systems Security Officer 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:
Continental US Anticipated Posting End: 1/4/2027

The Opportunity:

The Information Systems Security Officer (ISSO) will assist the Information System Security Manager (ISSM) with authorization, security-control implementation, continuous monitoring, vulnerability management, and maintenance of the cybersecurity posture for assigned authorization boundaries. You will collaborate with software developers, systems engineers, and government stakeholders to navigate the Risk Management Framework (RMF) lifecycle and maintain the Authority to Operate (ATO) for complex cloud environments.

Responsibilities:
• RMF & ATO Management:
Build and update standard RMF packages, including the Systems Security Plan (SSP), Plan of Actions and Milestones (POAMs), hardware and software inventories, and network topology diagrams.
• Security Engineering & Cloud Oversight:
Drive  security by design  by reviewing technical change requests, evaluating new technologies, and providing security oversight for cloud-based platforms (AWS/Azure).
• Vulnerability & Risk Mitigation:
Perform vulnerability/risk assessment analysis to support continuous monitoring and the certification and accreditation process.
• Technical Compliance & Monitoring:
Establish continuous monitoring protocols to track security posture, enforce cybersecurity policies, and brief complex technical risks to senior stakeholders.

Qualifications:

Education and Experience:

• 3-6 years of experience in Cybersecurity, Information Assurance, or related background.

Clearance &

Certifications:

• Active TS/SCI w/Poly.
• DoD 8140 IAT Level II Compliance (e.g., Security+, CCNA Security, or SSCP).Risk Management & Compliance:
• RMF Lifecycle:
Support RMF, IATT, ATO, and continuous-monitoring activities for cloud environments.
• Control Implementation:
Knowledge of NIST 800-53 and 800-171 control sets, including managing control inheritance and applying overlays.
• Governance & Documentation:
Develop and maintain SSPs, SCTMs, POA&Ms, SOPs, contingency plans, configuration documentation, and assessment evidence.

Engineering & Operations:
• Technical Oversight:
Experience reviewing system changes for security impact and collaborating with dev teams to integrate new technologies securely.
• Continuous Monitoring:
Proficiency in conducting security inspections, audits, and vulnerability analysis to track patch effectiveness and system health.

Desired:
• Experience working with governance risk and compliance tools (i.e. Xacta, SNOW, etc.).
• Experience utilizing common industry tools (i.e. Nessus, Splunk, Anchore, etc.).
• Experience with Cloud security. Analyzing evidence from Cloud Trail, Config, Security Hub, Guard Duty, Cloud Watch, Systems Manager, Inspector, and AWS Backup.

-What You Can Expect: A culture of integrity.

At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.

An environment of trust.

CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.

A focus on continuous growth.

Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new…