Information System Security Officer (ISSO) / Security Engineer (ISSE)

Job Title: Information System Security Officer (ISSO) / Security Engineer (ISSE) Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: Secret Employee Type: Regular Percentage of Travel Required: Up to 10% Type of Travel: Local * * * The Opportunity: Join a mission‑driven team securing the technologies that protect our nation. As an ISSO/ISSE supporting the Capability Program Executive for Chemical, Biological, Radiological and Nuclear Defense (CPE‑CBRND), you will play a critical role in safeguarding systems that enable warfighters to operate safely in contested CBRN environments. You will influence next‑generation capabilities—from tactical sensor networks to cloud‑enabled analytic systems—by embedding cybersecurity into every stage of the acquisition lifecycle. This role is ideal for a forward‑leaning cybersecurity professional who wants to shape secure architectures and lead RMF compliance from concept through fielding. Hybrid! Responsibilities: As an Information System Security Engineer (ISSE) Design, integrate, and test secure system architectures for tactical CBRN sensors, UAS platforms, and medical readiness networks. Apply DISA STIGs and SRGs across hardware, software, and operating systems to ensure hardened configurations. Conduct detailed technical vulnerability assessments, code reviews, and automated system scans using ACAS, Nessus, and SCAP tools. Collaborate with developers to remediate findings using secure DevSecOps practices and engineered security enhancements. As an Information System Security Officer (ISSO) Lead full RMF lifecycle activities, including A&A package development, to achieve and maintain IATT/ATO approvals. Develop and maintain RMF documentation in eMASS, including SSPs, POA&Ms, SCA evidence, and continuous monitoring artifacts. Serve as a key liaison between AOs, SCAs, engineering teams, and program management—ensuring technical requirements align with federal cybersecurity policy. Oversee ongoing security activities including log reviews, configuration management updates, and continuous monitoring actions. Qualifications: Required: Clearance: Active Secret (Top Secret‑eligible preferred). Experience: 3–5+ years of cybersecurity experience supporting RMF, A&A processes, system hardening, and/or systems/cloud engineering within the DoD. Education: Bachelor’s degree in Cybersecurity, Computer Science, IT, Engineering, or related technical discipline. Certifications: DoD 8570/8140 IAM/IAT Level II or III (Security+, CISSP, CASP+, CISM, etc.). Technical Skills: Hands‑on experience with eMASS, ACAS, STIG Viewer, and vulnerability scanning workflows. Knowledge: Familiarity with NIST SP 800‑37, NIST SP 800‑53, and CNSSI 1253. Communication: Strong ability to translate complex security requirements for diverse technical and non‑technical audiences. Desired: Experience supporting CBRN defense programs or tactical C4ISR/CBRN‑related systems. Understanding of cloud architectures (AWS/Azure GovCloud), containers/Kubernetes, and modern software acquisition pathways. Prior support to Army or Joint‑Service program offices, including ASA(ALT) or Joint PM structures. - 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 ground — in your career and in our legacy. Pay Range: There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits. The proposed salary range for this position is: $99,300 - 208,600 USD CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic. Click on Search Jobs to find and apply to CACI openings.