Information Systems Security Engineer (ISSE)

Company: CACI
Location: Denver
Posted on: April 2, 2026

Job Description:

Job Title: Information Systems Security Engineer (ISSE) Job Category: Engineering Time Type: Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee Type: Regular Percentage of Travel Required: None Type of Travel: None Anticipated Posting End: 3/27/2027 The Opportunity: We are seeking an Information Systems Security Engineer (ISSE), who will perform advanced Information System Security Engineering support for various information systems throughout the system development lifecycle. Responsibilities: Research and Development: Conduct research on emerging technologies, vulnerability information, and innovative solutions to enhance enterprise-wide cyber systems and networks. System Design and Architecture: Design and develop new cyber systems, applications, and solutions that meet the organization’s security requirements and standards. Prototype Development: Create prototypes and proof-of-concept solutions to demonstrate the feasibility and effectiveness of new cyber technologies. Testing and Validation: Perform rigorous testing and validation of new cyber systems and applications to ensure they meet performance, security, and compliance requirements. Integration and Deployment: Oversee the integration and deployment of new cyber solutions into the enterprise environment, ensuring minimal disruption to operations. Security Assessments: Conduct vulnerability assessments and security evaluations of new systems using standardized tools (e.g., Nessus, DISA STIGs) to identify and mitigate potential risks. Documentation: Prepare comprehensive documentation, including design specifications, testing reports, and user manuals, to support the implementation and maintenance of new cyber solutions. Continuous Improvement: Continuously monitor and evaluate the performance of deployed cyber systems, identifying areas for improvement and implementing enhancements as needed. Collaboration: Work closely with cross-functional teams, including developers, system administrators, and security analysts, to ensure the successful delivery of new cyber solutions. Customer Interaction: Engage with customers and stakeholders to gather requirements, provide updates on project progress, and ensure that new solutions align with business objectives. Compliance: Ensure that all new cyber systems and solutions comply with relevant regulations, standards, and policies (e.g., NIST, ICD 503). Qualifications: Required: Clearance: An active TS/SCI clearance with CI polygraph Certification: Must have a current certification compliant with DoD 8570 IAM or IAT level 2. Education and Experience: Bachelor’s degree in Computer Science, Information Assurance, Information Security System Engineering, or equivalent and seven (5) years of directly related experience. Knowledge: In-depth knowledge of cyber engineering principles, practices, and methodologies. Familiarity with industry standards and frameworks (e.g., NIST, ICD 503, CNSSI 1253). Understanding of enterprise-wide cyber systems and networks. Experience: Designing and developing new cyber systems, applications, and solutions. Conducting vulnerability assessments and security evaluations of new technologies. Implementing and testing prototypes and proof-of-concept solutions. Integrating and deploying new cyber solutions into enterprise environments. Collaborating with cross-functional teams to deliver complex projects. Preparing comprehensive documentation for new cyber systems and solutions. Soft Skills: Excellent Communication: Strong verbal and written communication skills. Interpersonal Skills: Ability to work effectively in a team environment and with various stakeholders. Problem-Solving: Strong analytical and problem-solving skills. Innovation: Creative thinking and ability to propose innovative solutions. Attention to Detail: Meticulous attention to detail in design, testing, and documentation. Adaptability: Ability to adapt to changing requirements and technologies. Desired: Proficient in Microsoft Application tools (i.e., Excel and PowerPoint). Experience with Sharepoint, Confluence, JIRA. Experience with developing test plans for information systems. Demonstrated system administration experience with Linux (Red Hat, CentOS) and/or Windows. Experience with DevOps. Familiarity with code quality and code analyzing security tools. Experience with Amazon Web Services (AWS): Should have current or ability to obtain an Amazon Cloud certification, such as AWS Certified Solutions Architect – Associate or AWS Certified Security Specialty. Audit log review: Ability to query and perform analysis in Splunk. Experience within the Intelligence Community. - 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: $90,300 - 189,600 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.

Keywords: CACI, Loveland , Information Systems Security Engineer (ISSE), IT / Software / Systems , Denver, Colorado