Sr. Staff Information Systems Security Engineer (ISSE) Chantilly, VA, US

CACI International Inc.; Chantilly, Northern (VA, KY); Hybrid; USD 121,000 - 266,000; Full time

Job summary

CACI International Inc. is seeking a Senior Staff Information Systems Security Engineer (ISSE) to serve as the security authority for mission-critical systems in Chantilly, VA. The role focuses on integrating RMF controls and achieving Authority to Operate (ATO) across cloud and on-prem environments.

You will collaborate with developers and government stakeholders to implement security by design, conduct risk assessments, and maintain continuous monitoring to protect critical infrastructure.

Qualifications

• Bachelor's degree in CS/IT/Cybersecurity or related field.
• Active TS/SCI w/ Poly.
• DoD 8570 IAT Level II Compliance (Security+, CCNA Security, CySA+).
• Deep experience navigating RMF lifecycle to secure and maintain ATO.
• Knowledge of NIST 800-53/800-171 control sets.
• Ability to author cybersecurity policies and manage POA&Ms.

Responsibilities

• RMF & ATO Management: lead end-to-end RMF process and coordinate with cybersecurity entities.
• Security Engineering & Cloud Oversight: security-by-design reviews for cloud platforms (AWS/Azure).
• Vulnerability & Risk Mitigation: conduct inspections, manage POA&Ms, plan patches.
• Technical Compliance & Monitoring: establish continuous monitoring and brief risks to stakeholders.

Skills

RMF mastery

Security engineering

Cloud security

Vulnerability assessment

Stakeholder communication

Education

Bachelor's degree in CS/IT/Cybersecurity

Tools

Nessus

Splunk

Anchore

Xacta

SNOW

Job description

## Sr. Staff Information Systems Security Engineer (ISSE)Chantilly, VA, USApply NowFind out how well you match with this jobJob ID: 332805Job Title: Sr. Staff Information Systems Security Engineer (ISSE)Job Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: TS/SCI with PolygraphEmployee Type: RegularPercentage of Travel Required: Up to 10%Type of Travel: Continental US\\* \\* \\***The Opportunity:**The **Senior Staff** **Information Systems Security Engineer (ISSE)** serves as the primary technical authority for the security and resilience of our mission-critical systems. This role is responsible for integrating security engineering principles into every phase of the Software Development Life Cycle to design and maintain secure architectures. You will collaborate with software developers, systems engineers, and government stakeholders to navigate the Risk Management Framework (RMF) lifecycle and maintain the Authority to Operate (ATO) for complex cloud and on-premise environments. **Responsibilities:*** **RMF & ATO Management:** Lead the end-to-end Risk Management Framework (RMF) process, managing NIST 800-53/171 control sets and coordinating with cybersecurity entities (SCA/DAO) to secure and maintain Authority to Operate (ATO).* **Security Engineering & Cloud Oversight:** Drive \"security by design\" by reviewing technical change requests, evaluating new technologies, and providing security oversight for cloud-based platforms (AWS/Azure).* **Vulnerability & Risk Mitigation:** Conduct system inspections and vulnerability assessments to manage POA&Ms, prioritize system patching, and ensure robust disaster recovery and contingency planning.* **Technical Compliance & Monitoring:** Establish continuous monitoring protocols to track security posture, enforce cybersecurity policies, and brief complex technical risks to senior stakeholders. **Qualifications:***Required:* **Education and Experience:**• Bachelor’s Degree in Computer Science, Information Technology, Cybersecurity, Engineering, or related degree.• Minimum of 10+ years of progressive experience in Cybersecurity, Information Assurance, or related background. **Clearance & Certifications:**• Active TS/SCI w/Poly.• DoD 8570 IAT Level II Compliance (e.g., Security+, CCNA Security, or CySA+). **Risk Management & Compliance:**• **Full RMF Lifecycle Mastery:** Deep experience navigating the Risk Management Framework (NIST 800-37) to secure and maintain Authority to Operate (ATO).• **Control Implementation:** Expert knowledge of NIST 800-53 and 800-171 control sets, including managing control inheritance and applying overlays.• **Governance & Documentation:** Ability to author cybersecurity policies, manage POA&Ms, and develop Contingency/Disaster Recovery plans. **Engineering & Operations:**• **Technical Oversight:** Experience reviewing system changes for security impact and collaborating with dev teams to integrate new technologies securely.• **Continuous Monitoring:** Proficiency in conducting security inspections, audits, and vulnerability analysis to track patch effectiveness and system health.• **Cloud Security:** Functional understanding of security operations within AWS or Azure environments. **Communication & Professionalism:**• **Stakeholder Engagement:** Proven ability to brief complex technical risks to large groups and coordinate directly with SCAs and DAOs.• **Resilience:** Ability to manage high-pressure tasks and mission-critical deadlines both independently and in team settings. *Desired:* • Advanced understanding of the software development lifecycle.• Experience working with governance risk and compliance tools (i.e. Xacta, SNOW, etc.).• Experience utilizing common industry tools (i.e. Nessus, Splunk, Anchore, etc.). -**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:$120,800 - $265,800*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.*