374,578open jobs
9,710companies
48,044added this week
Browse all
Salary
$131k – $237k per year
Location
In office (United States)
Seniority
Principal · 12+ years exp
Employment
Full-Time
Overview
Company
Impact
Profile match
Leidos is a defense, intelligence, civil, and health information technology enterprise. Headquartered in Reston, Virginia, the Fortune 500 company (NYSE: LDOS) operates as one of the primary IT, scientific research, and systems integration contractors for the U.S. federal government, allied defense agencies, and commercial infrastructure entities.

Are you ready to provide technical leadership for a mission-critical cybersecurity environment supporting the Department of War (DoW)?

Leidos is seeking a Principal Cybersecurity Engineer to support the C5ISR Center Cyber Security Service Provider (CSSP), a premier defensive cyber operations organization operating 24x7x365. The CSSP provides continuous monitoring, threat detection, incident response, and vulnerability management across a complex, multi-tenant enterprise environment.

As the Principal Cybersecurity Engineer, you will serve as Leidos' primary technical interface to the Government lead for Enterprise Cybersecurity. You will provide strategic and hands-on technical leadership across cybersecurity architecture, engineering, modernization, and technology integration.

You will evaluate emerging cybersecurity technologies, recommend and design enterprise solutions, and lead feasibility studies, proofs of concept, pilot projects, and other research and development initiatives designed to strengthen the customer's cybersecurity posture.

Location: Hybrid - 3 days on site at Adelphi, MD

Clearance: U.S. Citizenship with an active TS/SCI with SAP Eligibility

Required Certifications: CISSP

Primary Responsibilities:

  • Lead the design, architecture, integration, and implementation of complex enterprise cybersecurity systems and supporting technologies.

  • Serve as a senior technical advisor to Government stakeholders and Leidos leadership on enterprise cybersecurity strategy, architecture, risk, and modernization.

  • Assess organizational progress against cybersecurity strategies and develop recommendations aligned with mission objectives and stakeholder priorities.

  • Evaluate emerging cybersecurity technologies and lead feasibility studies, proofs of concept, pilot programs, and technology assessments.

  • Assess enterprise cybersecurity risk, including weaknesses in platforms, access controls, system configurations, networks, applications, and data environments.

  • Provide engineering leadership for the design, development, and implementation of solutions that protect and monitor enterprise networks and systems.

  • Lead the development and integration of innovative cybersecurity solutions through collaboration with engineering, operations, cybersecurity, Government, and industry experts.

  • Identify security-relevant data, technologies, and capabilities across on-premises, hybrid-cloud, and multi-cloud environments and provide formal technical recommendations to stakeholders.

  • Guide cybersecurity modernization initiatives, including the migration of services, applications, and data from on-premises environments to hybrid and multi-cloud architectures.

  • Engage with technology vendors, evaluate solutions, and recommend technologies for enterprise implementation.

  • Influence technical and organizational change by communicating complex cybersecurity concepts, recommendations, and approaches to technical and executive stakeholders.

Basic Qualifications:

  • Bachelor's degree in Cybersecurity, Computer Science, Information Technology, Engineering, or a related technical discipline with 12+ years of relevant IT/cybersecurity experience. Four additional years of relevant experience may be considered in lieu of a degree.

  • 4+ years of cybersecurity engineering experience directly supporting the Federal Government as a Government or contractor employee.

  • Extensive experience developing and executing migration strategies for services, applications, or data moving from on-premises environments to hybrid or multi-cloud architectures.

  • Strong knowledge and operational experience with Federal cybersecurity requirements and frameworks, including NIST, FISMA, and FedRAMP.

  • Deep understanding of cybersecurity architecture, technical platforms, threat management, security controls, and industry best practices.

  • Experience identifying security-relevant data and technologies across on-premises and cloud environments and developing technical solutions for evolving mission requirements.

  • Experience evaluating vendors, designing technical solutions, and selecting cybersecurity technologies for enterprise implementation.

  • Broad technical knowledge across enterprise IT, systems engineering, cybersecurity engineering, IT lifecycle methodologies, modernization, and transformation.

  • Demonstrated ability to influence stakeholders and gain support for new technologies, concepts, practices, and approaches.

  • Experience leading technical transformation and improving enterprise cybersecurity services and capabilities.

  • CISSP certification

  • U.S. citizenship with an active Top Secret clearance and eligibility to obtain a SCI.

  • Exceptional written and verbal communication skills with the ability to engage technical teams, Government stakeholders, and senior leadership.

Preferred Qualifications:

  • Active Top Secret/SCI clearance.

  • Additional cybersecurity certifications such as CISM, CISSP-ISSEP, GSLC, or CCISO.

  • Knowledge of Agile project management principles and methodologies.

  • Experience supporting both classified and unclassified environments.

  • Experience supporting Security Operations Center (SOC) environments and multi-tenant cybersecurity operations.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Original Posting:

September 1, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

Pay Range $131,300.00 - $237,350.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Free account
Stop reading job ads. Get the ones that fit.
One free account turns this page into a shortlist built around your stack, your level and your pay.
Match on every job. Stack, seniority, pay and location, scored against your profile.
374,578 open roles. Read straight off company career pages, refreshed every day.
Unlimited applications. Every one you send is tracked in one place, on-site or on a company board.
3 tailored CVs a month. Rewritten for the exact job you are applying to. Included free.
Create a free account
Free forever. No card. Under a minute.

Your match

How well do you fit this role?
Two answers are enough for a real match. No account needed.
Check my fit
Answers stay in this browser until you create an account.

Recommended for you based on this role

Similar stack
Same company
United States
$128k – $173k per year • In office • Full-Time • 5+ years exp • Bachelor's Degree • United States
PowerShell
Python
DevOps
Amazon CloudWatch
Ansible
ArgoCD
AWS
Azure
Bicep
CI/CD
CloudFormation
Datadog
FinOps
GCP
GitHub
GitHub Actions
GitLab
GitOps
Grafana
Jenkins
New Relic
Prometheus
Terraform
Kubernetes
Cybersecurity
FedRAMP
Apply
$56k – $134k per year (Estimated) • Remote • Internship • 3+ years exp
Go
Python
Databases
Apache Kafka
AI/ML
AI Agents
LLM
Model Context Protocol
RAG
DevOps
Docker
GCP
gRPC
Kubernetes
Rest API
Cybersecurity
FedRAMP
Apply
Engineering Manager 11 hours ago
$139k – $163k per year • Remote • Full-Time • 3+ years exp
Databases
Databricks
DevOps
AWS
CI/CD
SLI/SLO/SLA
Cybersecurity
FedRAMP
NIST 800-53
Apply
$117k – $177k per year • In office • Full-Time • 4+ years exp • PhD • Herndon • Columbia
AI/ML
Agentforce
AI Agents
DevOps
AWS
Azure
GCP
Cybersecurity
FedRAMP
Marketing
Salesforce
Apply
$94k – $120k per year • Remote • 3+ years exp • Bachelor's Degree
AI/ML
Human-in-the-Loop
DevOps
AWS
Cybersecurity
FedRAMP
Apply
$108k – $195k per year • In office • Full-Time • Bachelor's Degree • United States
Apply
$131k – $237k per year • In office • Full-Time • Bachelor's Degree • United States
Apply
$108k – $195k per year • In office • Full-Time • 5+ years exp • Bachelor's Degree • Houston • Huntsville • Cleveland • Washington
Apply
$140k – $220k per year • In office • Full-Time • 8+ years exp • Bachelor's Degree • San Diego
C++
MATLAB
Python
C
C++
CMake
C
GCC
AI/ML
Human-in-the-Loop
DevOps
CI/CD
GitLab
Jenkins
Apply
$87k – $157k per year • In office • Full-Time • 4+ years exp • Bachelor's Degree • San Diego
C++
MATLAB
Python
C
C++
CMake
C
GCC
DevOps
CI/CD
Git
Jenkins
Chips/EDA
OpenOCD
Apply
$129k – $203k per year • Remote/Hybrid • Full-Time • 3+ years exp • Bachelor's Degree • Cambridge
Python
Apply
$81k – $162k per year (Estimated) • Equity • Remote • Full-Time • 5+ years exp • Charlotte
Analytics
Power BI
Apply
$125k – $226k per year • In office • Full-Time • 12+ years exp • Bachelor's Degree • Princeton • Austin
JavaScript
SQL
TypeScript
Java
Java
Spring Boot
Spring Cloud
Databases
Apache Kafka
Cassandra
DynamoDB
PostgreSQL
Redis
Frontend
Angular
React.js
DevOps
AWS
Azure
Azure DevOps
CI/CD
CloudFormation
Docker
GCP
GitHub
GitHub Actions
GitLab
Jenkins
Kubernetes
Rest API
Terraform
Apply
Fraud Data Analyst 9 hours ago
$98k – $163k per year • In office • Full-Time • 3+ years exp • Bachelor's Degree • Arlington
Python
SQL
DevOps
Git
GitLab
Analytics
Tableau
Apply
$133k – $338k per year • Remote/Hybrid • Full-Time • 8+ years exp • Associate's Degree • Chicago • Milwaukee • Dallas • Columbus • Kirkland
AI/ML
Knowledge Graph
DevOps
AWS
Azure
GCP
Platform Engineering
SLI/SLO/SLA
Apply
See all jobs
This is one of many
374,578 more open roles from verified company boards, updated every day.