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Sr. ISSE TS/SCI Poly - Careers at Leidos

Leidos

Sr. ISSE TS/SCI Poly - Careers at Leidos

full-timePosted: Feb 3, 2026

Job Description

Join Leidos as a Sr. ISSE TS/SCI Poly in Annapolis Junction, MD

Leidos delivers innovative solutions through diverse, talented teams dedicated to customer success. We empower employees, contribute to communities, and uphold sustainable practices guided by our Mission, Vision, and Values. Thrive in an environment offering career enrichment, mobility, development, and rewarding relationships with supportive leaders and colleagues.

Position Overview

This Senior Information Systems Security Engineer (ISSE) role joins a high-performing agile team using Scaled Agile Framework (SAFe) on a fast-paced, complex program. Support DEVOPS best practices across robust development, test, and production environments. Enhance system security architecture, manage RMF-compliant security plans, handle cross-domain capabilities, and perform Security Verification Testing (SVT) for Type 1 devices. Focus on injecting new technologies while sustaining operational systems.

Key Responsibilities

  • Validate security requirements and design for large-scale, geographically distributed systems.
  • Implement uniform security policies and enterprise solutions.
  • Recommend technical security products and standards.
  • Lead risk analysis, management, and certification activities.
  • Collaborate with System, Test, and Integration teams.
  • Audit configurations and evaluate software security.
  • Communicate security issues to Program Managers and customers.

Required Qualifications

Active TS/SCI Polygraph clearance (no exceptions). Proven experience in security engineering for complex systems, vulnerability testing, RMF, and agile environments. Strong communication and teamwork skills essential.

Why Leidos?

Work on significant programs adding advanced capabilities. Enjoy pay range $131,300 - $237,350 USD, career growth, and a collaborative culture. Your impactful work starts here.

Locations

  • Annapolis Junction, Maryland, United States

Salary

131,300 - 237,350 USD / yearly

Estimated Salary Rangehigh confidence

131,300 - 237,350 USD / yearly

* This is an estimated range based on market data and may vary based on experience and qualifications.

Skills Required

  • System Security Architectureintermediate
  • Risk Management Framework (RMF)intermediate
  • Vulnerability Testingintermediate
  • Scaled Agile Framework (SAFe)intermediate
  • DEVOPS Practicesintermediate
  • Cross Domain Solutionsintermediate
  • Security Verification Testing (SVT)intermediate

Required Qualifications

  • Active TS/SCI Polygraph Clearance (experience)
  • Experience with large-scale system security designs (experience)
  • Hands-on vulnerability testing expertise (experience)
  • Knowledge of security policies and practices (experience)
  • Agile team collaboration experience (experience)
  • Bachelor's degree in relevant field (preferred) (experience)

Responsibilities

  • Validate and verify system security requirements for complex networks
  • Develop and recommend security architectures and solutions
  • Assess and mitigate security threats throughout system lifecycle
  • Manage system security plans for DEV, TEST, and PROD environments
  • Collaborate with engineering teams on security integration
  • Conduct audits and assessments using industry tools
  • Participate in Program Increment Planning and agile ceremonies

Benefits

  • general: Career mobility and development opportunities
  • general: Supportive supervisors and talented colleagues
  • general: Competitive salary $131,300 - $237,350
  • general: Comprehensive health and wellness programs
  • general: Professional growth in mission-critical programs
  • general: Community contribution initiatives

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Jobs in Annapolis Junction MDLeidos CareersTS/SCI Clearance JobsCybersecurity United StatesDefense IT HiringEngineeringInformation TechnologySecurity

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Leidos logo

Sr. ISSE TS/SCI Poly - Careers at Leidos

Leidos

Sr. ISSE TS/SCI Poly - Careers at Leidos

full-timePosted: Feb 3, 2026

Job Description

Join Leidos as a Sr. ISSE TS/SCI Poly in Annapolis Junction, MD

Leidos delivers innovative solutions through diverse, talented teams dedicated to customer success. We empower employees, contribute to communities, and uphold sustainable practices guided by our Mission, Vision, and Values. Thrive in an environment offering career enrichment, mobility, development, and rewarding relationships with supportive leaders and colleagues.

Position Overview

This Senior Information Systems Security Engineer (ISSE) role joins a high-performing agile team using Scaled Agile Framework (SAFe) on a fast-paced, complex program. Support DEVOPS best practices across robust development, test, and production environments. Enhance system security architecture, manage RMF-compliant security plans, handle cross-domain capabilities, and perform Security Verification Testing (SVT) for Type 1 devices. Focus on injecting new technologies while sustaining operational systems.

Key Responsibilities

  • Validate security requirements and design for large-scale, geographically distributed systems.
  • Implement uniform security policies and enterprise solutions.
  • Recommend technical security products and standards.
  • Lead risk analysis, management, and certification activities.
  • Collaborate with System, Test, and Integration teams.
  • Audit configurations and evaluate software security.
  • Communicate security issues to Program Managers and customers.

Required Qualifications

Active TS/SCI Polygraph clearance (no exceptions). Proven experience in security engineering for complex systems, vulnerability testing, RMF, and agile environments. Strong communication and teamwork skills essential.

Why Leidos?

Work on significant programs adding advanced capabilities. Enjoy pay range $131,300 - $237,350 USD, career growth, and a collaborative culture. Your impactful work starts here.

Locations

  • Annapolis Junction, Maryland, United States

Salary

131,300 - 237,350 USD / yearly

Estimated Salary Rangehigh confidence

131,300 - 237,350 USD / yearly

* This is an estimated range based on market data and may vary based on experience and qualifications.

Skills Required

  • System Security Architectureintermediate
  • Risk Management Framework (RMF)intermediate
  • Vulnerability Testingintermediate
  • Scaled Agile Framework (SAFe)intermediate
  • DEVOPS Practicesintermediate
  • Cross Domain Solutionsintermediate
  • Security Verification Testing (SVT)intermediate

Required Qualifications

  • Active TS/SCI Polygraph Clearance (experience)
  • Experience with large-scale system security designs (experience)
  • Hands-on vulnerability testing expertise (experience)
  • Knowledge of security policies and practices (experience)
  • Agile team collaboration experience (experience)
  • Bachelor's degree in relevant field (preferred) (experience)

Responsibilities

  • Validate and verify system security requirements for complex networks
  • Develop and recommend security architectures and solutions
  • Assess and mitigate security threats throughout system lifecycle
  • Manage system security plans for DEV, TEST, and PROD environments
  • Collaborate with engineering teams on security integration
  • Conduct audits and assessments using industry tools
  • Participate in Program Increment Planning and agile ceremonies

Benefits

  • general: Career mobility and development opportunities
  • general: Supportive supervisors and talented colleagues
  • general: Competitive salary $131,300 - $237,350
  • general: Comprehensive health and wellness programs
  • general: Professional growth in mission-critical programs
  • general: Community contribution initiatives

Target Your Resume for "Sr. ISSE TS/SCI Poly - Careers at Leidos" , Leidos

Get personalized recommendations to optimize your resume specifically for Sr. ISSE TS/SCI Poly - Careers at Leidos. Takes only 15 seconds!

AI-powered keyword optimization
Skills matching & gap analysis
Experience alignment suggestions

Check Your ATS Score for "Sr. ISSE TS/SCI Poly - Careers at Leidos" , Leidos

Find out how well your resume matches this job's requirements. Get comprehensive analysis including ATS compatibility, keyword matching, skill gaps, and personalized recommendations.

ATS compatibility check
Keyword optimization analysis
Skill matching & gap identification
Format & readability score

Tags & Categories

Jobs in Annapolis Junction MDLeidos CareersTS/SCI Clearance JobsCybersecurity United StatesDefense IT HiringEngineeringInformation TechnologySecurity

Answer 10 quick questions to check your fit for Sr. ISSE TS/SCI Poly - Careers at Leidos @ Leidos.

Quiz Challenge
10 Questions
~2 Minutes
Instant Score

Related Books and Jobs

No related jobs found at the moment.