Information System Security Engineer (ISSE) Senior - TS with SCI eligibility required

Lever, Inc.; Washington (District of Columbia); Hybrid; USD 140,000 - 155,000; Full time

Benefits offered by this job

Health Insurance

Life Insurance

Paid Time Off

Holiday Pay

Disability Insurance

Retirement Plan

Learning and Development

Job summary

Agile Defense in Washington, DC is seeking a senior ISSE to support FBI efforts, developing and sustaining a methodology to categorize FBI IT systems by architecture, hosting, data sensitivity, and mission function. You will work with ISSOs and leadership to ensure categorization decisions are technically sound and well documented.

The role requires a TS clearance and experience with RMF, NIST standards, and both on‑prem and cloud environments, including Azure/AWS.

Qualifications

• Bachelor's degree in Information Security, Engineering, or related field.
• 8+ years of experience, or equivalent relevant work experience.
• Active TS clearance is required.
• Experience with FBI guidance, RMF, NIST SP 800-53, CNSS 1253.
• Experience with on-premises and cloud environments (Azure, AWS, or hybrid).
• Ability to map findings to staffing, security, and compliance requirements.
• Strong communication skills to explain complex issues to technical and non-technical stakeholders.

Responsibilities

• Support methodology to categorize FBI IT systems by architecture, hosting, data sensitivity, and mission function.
• Assess system architecture, interfaces, hosting models, and security control implications for ISSO/ISSE support levels.
• Analyze traditional, hybrid, and cloud-based systems to define staffing and cost implications.
• Translate system attributes into labor mapping aligned to ITSSS categories and seniority.
• Document categorization decisions and support RMF and system security engineering activities.
• Review FBI, NIST, CNSS guidance to keep the methodology current.

Skills

TS Clearance

Security architecture

Cloud platforms

Documentation & RMF

Staffing/compliance mapping

Communication skills

Education

Bachelor's degree in Information Security, Engineering, or related field

Tools

GRC platforms

Job description

About Agile Defense

At Agile Defense we know that action defines the outcome and new challenges require new solutions. That’s why we always look to the future and embrace change with an unmovable spirit and the courage to build for what comes next.

Our vision is to bring adaptive innovation to support our nation's most important missions through the seamless integration of advanced technologies, elite minds, and unparalleled agility—leveraging a foundation of speed, flexibility, and ingenuity to strengthen and protect our nation’s vital interests.

Requisition #: 1915

Job Title: Information System Security Engineer (ISSE) Senior

Location: Washington, DC

Clearance Level: TS with SCI eligibility required to start job

Required Certification(s): One of the following: CISSP, CASP+, CISM, CCSP, CAP, or AWS/Azure security certifications

Job Description

Agile Defense is seeking a skilled Information System Security Engineer (ISSE) to support the FBI under Objective 2: ISSO/ISSE Program Management. The ISSE will provide technical security engineering expertise to help develop, implement, and sustain a methodology for categorizing FBI IT systems based on architecture, complexity, hosting environment, security posture, and mission requirements.

This role supports the technical analysis needed to differentiate systems by risk, technology stack, overlays, and operational dependencies, and to ensure those categorizations effectively inform labor allocation, reporting, and cost recovery. The ISSE will work closely with ISSOs, system owners, architects, and program leadership to maintain a scalable and compliant categorization framework aligned with FBI and federal standards.

Key Responsibilities:

• Support design and maintenance of a methodology to categorize FBI IT systems based on:
  Architecture and technology stack
  Security classification level
  FIPS-199 impact level
  National Security System designation
  Hosting environment (on-premises, Azure, AWS)
  CNSS 1253 overlays
  Data sensitivity and data types
  Mission/business function
  System complexity and integration dependencies
• Assess system architecture, interfaces, hosting models, and security control implications to help determine appropriate ISSO/ISSE support levels.
• Analyze traditional, hybrid, and cloud-based systems to distinguish technical support requirements.
• Support accurate grouping of systems based on risk, operational impact, engineering effort, and compliance obligations.
• Translate technical system attributes into labor mapping recommendations aligned to ITSSS labor categories and seniority levels.
• Partner with ISSOs and program leadership to ensure categorization decisions are technically sound, repeatable, and well documented.
• Contribute to documentation supporting system assignments, engineering rationale, and support models.
• Support chargeback and cost recovery efforts by aligning technical support effort with system and division-level reporting.
• Assist with automated or semi-automated workflows used for categorization, reporting, and cost assignment.
• Support updates to reporting tools and technical logic when policy, technology, or organizational changes occur.
• Contribute to RMF and system security engineering activities, including:
  Security architecture reviews
  Control implementation analysis
  Inheritance considerations
  Boundary analysis
  System interconnection analysis
  Technical documentation support
• Review and apply NIST, CNSS, and FBI guidance to ensure methodology remains compliant and current.
  Support continuous improvement of the categorization framework as new technologies and requirements emerge.

Education and Background

• Bachelor's degree in Information Security, Engineering, or related field.
• 8+ years of experience, or equivalent relevant work experience; e.g., each year of work experience may be substituted for each year of education required.

Required Skills

• Active Top Secret clearance required.
• Experience assessing complex systems for security architecture, control implementation, and risk categorization.
• Strong knowledge of:
  • FIPS-199
  • NIST SP 800-37
  • NIST SP 800-53
  • CNSS 1253
  • RMF
  • System security engineering principles
• Experience with on-premises and cloud environments, including Azure, AWS, or hybrid enterprise systems.
• Experience supporting technical security documentation and system authorization packages.
• Ability to analyze diverse technical architectures and map findings to staffing, security, and compliance requirements.
• Strong communication skills with the ability to explain technical issues to technical and non-technical stakeholders.

Preferred Skills

• Experience supporting FBI, DOJ, DoD, IC, or other federal national security customers.
• Experience with classified systems, cross-domain solutions, or National Security Systems.
• Experience using GRC platforms or structured repositories for system and security data.
• Familiarity with automation, workflow orchestration, or reporting tools supporting cybersecurity operations.
• Relevant certification(s), such as CISSP, CASP+, CISM, CCSP, CAP, or AWS/Azure security certifications.

$140,000 - $155,000 a year

In addition, Agile Defense invests in its employees beyond just compensation. Agile’s benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Learning and Development opportunities as well as other optional benefit elections.

Our Core Values

• Happy - Be Infectious. Happiness multiplies and creates a positive and connected environment where motivation and satisfaction have an outsized effect on everything we do.
• Helpful - Be Supportive. Being helpful is the foundation of teamwork, resulting in a supportive atmosphere where collaboration flourishes, and collective success is celebrated.
• Honest - Be Trustworthy. Honesty serves as our compass, ensuring transparent communication and ethical conduct, essential to who we are and the complex domains we support.
• Humble - Be Grounded. Success is not achieved alone, humility ensures a culture of mutual respect, encouraging open communication, and a willingness to learn from one another and take on any task.
• Hungry - Be Eager. Our hunger for excellence drives an insatiable appetite for innovation and continuous improvement, propelling us forward in the face of new and unprecedented challenges.
• Hustle - Be Driven. Hustle is reflected in our relentless work ethic, where we are each committed to going above and beyond to advance the mission and achieve success.

Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities

Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities