Mid Security Specialist

CACI; Denver (CO); On-site; USD 63,300 - 129,700; Full time

Job summary

CACI is seeking a Mid Security Specialist in Denver, CO to join an Agile program delivering GEOINT capabilities for NGA. You will be a hands-on security professional supporting RMF activities, vulnerability management, STIG hardening, and security documentation across the development and deployment lifecycle.

You will work with developers, platform engineers, and Government security stakeholders to ensure secure, compliant mission systems.

Qualifications

• Bachelor's degree in Cybersecurity, Information Systems, or a related technical discipline (equivalent experience accepted).
• 4+ years of information security or information assurance experience.
• Working knowledge of RMF and NIST SP 800-53 security controls.
• Hands-on experience with vulnerability scanning and STIG compliance tools.
• DoD 8570/8140 IAT Level II certification (Security+ CE or equivalent).
• Strong documentation and communication skills.

Responsibilities

• Support RMF activities including security control implementation, assessment, and continuous monitoring.
• Conduct vulnerability scanning and analysis using ACAS/Nessus; track remediation through POA&Ms.
• Apply and validate DISA STIG hardening across applications, operating systems, and infrastructure components.
• Develop and maintain security documentation supporting Authorization to Operate (ATO) packages.
• Coordinate with development teams to integrate security requirements into design and delivery.
• Monitor security posture and report findings, risks, and metrics to program and Government stakeholders.
• Support incident response, audit, and inspection activities as required.

Skills

RMF

NIST SP 800-53

Documentation

Communication

Education

Bachelor's degree in Cybersecurity or related field

Tools

ACAS

Nessus

STIG compliance tools

Xacta

Job description

Job Title: Mid Security Specialist

Job Category: Information Technology

Time Type: Full time

Minimum Clearance Required to Start: TS/SCI

Employee Type: Regular

Percentage of Travel Required: Up to 10%

Type of Travel: Continental USA

Anticipated Posting End: 12/31/2026

The Opportunity:

• Join an Agile program delivering GEOINT capabilities to the National Geospatial-Intelligence Agency (NGA) as a hands-on security professional.
• Help keep mission systems secure and compliant across the full development and deployment lifecycle.
• Work alongside developers, platform engineers, and Government security stakeholders in a fast-moving environment.
• Directly support the security posture of systems that enable intelligence analysis and mission execution.

This position is contingent upon contract award

Responsibilities:

• Support Risk Management Framework (RMF) activities including security control implementation, assessment, and continuous monitoring.
• Conduct vulnerability scanning and analysis using tools such as ACAS/Nessus; track remediation through POA&Ms.
• Apply and validate DISA STIG hardening across applications, operating systems, and infrastructure components.
• Develop and maintain security documentation supporting Authorization to Operate (ATO) packages.
• Coordinate with development teams to integrate security requirements into design and delivery.
• Monitor security posture and report findings, risks, and metrics to program and Government stakeholders.
• Support incident response, audit, and inspection activities as required.

Qualifications:

Required:

• TS/SCI Security Clearance with ability to obtain Polygraph
• Bachelor's degree in Cybersecurity, Information Systems, or a related technical discipline (equivalent experience accepted).
• 4+ years of information security or information assurance experience.
• Working knowledge of RMF and NIST SP 800-53 security controls.
• Hands-on experience with vulnerability scanning and STIG compliance tools.
• DoD 8570/8140 IAT Level II certification (Security+ CE or equivalent).
• Strong documentation and communication skills.

Desired:

• Experience witheMASS, Xacta, or similar A&A management tools.
• Familiarity with container and cloud security practices.
• Experience operating withinSAFeor Agile delivery frameworks.

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.

Since this position can be worked in more than one location, the range shown is the national average for the position.

The proposed salary range for this position is:

$63,300-$129,700

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 other protected characteristic.