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Information Systems Security Officer (ISSO)

CACI


Job Location:

Reston, VA - USA

Yearly Salary: USD 120800 - 265800
Posted: 1 October 2026 (Yesterday)
Application Deadline: 29 December 2026
Vacancies: 1 Vacancy

Job Summary

Job Title: Information Systems Security Officer (ISSO)

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

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The Opportunity:

CACI is seeking an Information Systems Security Officer (ISSO) for the Global Mission Operations Support (GMOS) contract supporting the Department of State. This role offers a unique opportunity to enhance national security through advanced IT solutions. You will collaborate with experienced professionals in an innovative environment guiding a high-performing team to deliver excellence. The GMOS contract aims to provide world-class IT support by modernizing and maintaining applications and infrastructure using an integrated IT Service Management approach. Join us to make a meaningful impact on a program of national importance.

Responsibilities:

  • Leads comprehensive security and internal controls maintenance in accordance with DOS policies and procedures across CA IT enterprise supporting 40000 users

  • Maintains comprehensive security-approved thresholds for sites ensuring enterprise compliance with DOS security policies

  • Leads monitoring and response to vulnerability and threat reports coordinating remediation activities with bureaus and agencies

  • Provides comprehensive security guidance for service portfolio management ensuring alignment with Federal accessibility standards and compliance requirements

  • Ensures all infrastructure architecture and standards development align with DOS and Federal security requirements

  • Ensures all engineering designs for physical and virtual hosting environments incorporate comprehensive security best practices complying with DOS security policies FISMA requirements and NIST standards

  • Leads security compliance for engineering IT services including Exchange AD DNS DHCP and backup services ensuring alignment with modern security protocols

  • Provides comprehensive security guidance for network engineering services ensuring secure connectivity and compliance across 350 facilities

  • Leads infrastructure audits assessments and compliance analysis ensuring system baselines meet DOS and DT/EA/CST security requirements

  • Possesses and applies a comprehensive knowledge across key tasks and high impact assignments plans and leads major technical assignments and functions as a technical expert across multiple project assignments; may supervise others

Qualifications:

  • BA/BS degree and 13 years of relevant cybersecurity information assurance information systems security or related experience; equivalencies considered.

  • Active Secret clearance.

  • Extensive experience serving as an ISSO ISSM cybersecurity engineer or equivalent security professional supporting complex enterprise IT environments.

  • Demonstrated experience implementing and maintaining cybersecurity requirements in accordance with NIST Risk Management Framework (RMF) FISMA NIST SP 800-53 and applicable Federal security standards.

  • Experience supporting the Assessment & Authorization (A&A) lifecycle including security controls authorization packages continuous monitoring and system reauthorization.

  • Experience developing and maintaining cybersecurity documentation including System Security Plans (SSPs) POA&Ms risk assessments security controls and authorization artifacts.

  • Demonstrated experience conducting security assessments compliance reviews vulnerability analysis and continuous monitoring including tracking findings through remediation and closure.

  • Experience with enterprise vulnerability management security monitoring configuration compliance and system hardening tools and practices.

  • Strong understanding of security requirements across enterprise infrastructure including Windows/Linux Active Directory Exchange network services virtualization hosting/cloud environments and identity and access management.

  • Experience reviewing system architectures engineering designs configurations and changes to identify cybersecurity risks and ensure security requirements are incorporated throughout the system lifecycle.

  • Experience supporting incident response threat management vulnerability remediation and security escalation in coordination with technical teams and Government cybersecurity stakeholders.

Desired

  • Prior cybersecurity experience supporting Federal Government enterprise IT environments particularly the Department of State.

  • Familiarity with Department of State cybersecurity policies security authorization processes and enterprise security tools.

  • Experience securing large-scale globally distributed on-premises virtualized hybrid or cloud environments.

  • Experience with ServiceNow SIEM/SOC technologies EDR vulnerability management platforms or comparable enterprise security tools.

  • Knowledge of Zero Trust Architecture (ZTA) principles and Federal Zero Trust requirements.

  • Relevant cybersecurity certification such as CISSP CISM SecurityX/CASP CGRC CCSP or equivalent.

  • ITIL 4 Foundation certification or experience supporting an ITIL-based enterprise service management environment.


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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 youll be part of a high-performing group dedicated to our customers 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. Youll 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 nations 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:

$120800 - $265800

CACI is anEqualOpportunity 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 otherprotectedcharacteristic.

Required Experience:

Unclear Seniority


About Company

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CACI employs a diverse range of talent to create an environment that fuels innovation and fosters continuous improvement and success. At CACI, you will have the opportunity to make an immediate impact by providing information solutions and services in support of national security miss ... View more

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