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Information System Security Engineer

Job in Denver, Denver County, Colorado, 80285, USA
Listing for: CACI International Inc.
Full Time position
Listed on 2026-06-18
Job specializations:
  • IT/Tech
    Cybersecurity, Systems Engineer
  • Engineering
    Cybersecurity, Systems Engineer
Salary/Wage Range or Industry Benchmark: 150000 - 200000 USD Yearly USD 150000.00 200000.00 YEAR
Job Description & How to Apply Below
Job ID327029

Job Title:

Information System Security Engineer Job Category:
Engineering 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: 1/1/2100

This position will provide Information Assurance support for various information systems throughout the system development lifecycle. Our ISSE must be comfortable with providing customer and program teams with input as to how to meet various security requirements.

What You’ll Get to Do:

Navigating projects through the RMF process to achieve IATT and ATOWriting NIST 800-53 responses to security controls, including inherited, shared, or systems level controls

Providing technical guidance regarding the system’s Assessment and Authorization (A&A) process

Participating in security testing and assessments

Prepare, Present, and Maintain all security related documentation for system including, but not limited to, system security plan, body of evidence, Plan of Action and Milestones (POAM), and Certification and Accreditation (C&A) documentation leveraging online record keeping systems

Identifying missing, inaccurate, or duplicate data Establishing and maintaining strong relationships with the organization’s Information Systems Security Managers (ISSM) and seeking guidance for approval, as needed

Working with the team to mitigate the risk elements (POAMs) identified during assessment and seeking validation from enterprise security depending on level of risk element

Facilitating and attending Technical Exchange Meetings (TEMs) with engineers and other partners to gather requirements for project registration and control implementation

Supporting weekly and ad hoc reporting requirements

Preparing and presenting briefing material

Qualifications:

Required:

Typically requires bachelor's degree or equivalent and 5 plus years of directly related experience

Minimum of 5 years ISSE /System Engineering experience, or directly related.

Experience with implementing NIST 800-53 controls/ICD 503

Knowledge of the NRO environment and the Xacta 360 tool to navigate projects through the RMF process to achieve IATT & ATOExperience participating in Assessment and Authorization (A&A) process

Experience preparing systems security documentation (e.g., security plans, risk assessment reports, Plan of Actions and Milestones (POA&Ms), etc.)Experience with Continuous Monitoring, mitigating scan findings, maintaining network cut sheets/PPS sheets

Experience with system integration and hardening in the NRO cloud environment

Experience working with engineers and system administrators to correct scan findings / system vulnerabilities

Must have a current and active TS/SCI with CI Polygraph to begin employment

Must have current Security+ Certification or another DoD 8570 Complaint IA Certification, or ability to obtain immediately upon hiring

Vulnerability assessment scanning experience (Security Center/NESSUS)
Desired:

Information Systems Security Officer (ISSO) knowledge and/or experience

Experience with developing test plans for information systems

Demonstrated experience with Linux (Red Hat)

Experience with Dev Sec Ops 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 Netwitness, Splunk, etcWhat 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…
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