Lead Test Engineer

Leidos LLC; Gaithersburg (MD); Hybrid; USD 92,000 - 167,000; Full time

Job summary

Leidos LLC in Gaithersburg, MD, seeks a Test Engineer to advance the L-CAP platform within the Air Traffic Business Area. The role focuses on building automated test frameworks for microservices, integrating tests into CI/CD, and validating performance under load in a SAFe/Agile environment.

Applicants should have 8+ years in test automation, strong Java/JavaScript skills, and experience with containerized environments. A U.S.

Qualifications

• Bachelor's or higher in CS/SE or related field with 8+ years experience.
• Strong experience integrating tests into CI/CD pipelines.
• Proficiency in Selenium, JUnit, and pytest.
• Experience with performance, API, and integration testing.
• Ability to obtain and maintain a Public Trust clearance.

Responsibilities

• Design and implement test automation frameworks for microservices-based platform components.
• Build and maintain reusable test libraries and utilities for the L-CAP test infrastructure.
• Integrate automated tests into CI/CD pipelines ensuring continuous quality gates.
• Conduct performance testing to validate system behavior under load and stress conditions.
• Execute integration testing across platform services, APIs, and external system interfaces.
• Develop test plans and strategies aligned with sprint and PI objectives.
• Analyze defect patterns and test metrics to identify quality trends and improvement opportunities.
• Collaborate with development and systems engineering teams on testability and quality requirements.
• Support test environment configuration and test data management activities.
• Mentor junior test engineers on automation practices and testing methodologies.
• Design and execute test scenarios based on operational ATC workflows ensuring modernized services replicate legacy system behaviour.
• Develop distributed service validation frameworks verifying inter-service communication, data flow, and performance under operational conditions.
• Implement data-driven verification approaches supporting modernization of legacy automation functions.
• Embrace an AI-first engineering culture by actively adopting AI-assisted development tools, automation, and modern engineering practices that improve productivity, code quality, and delivery velocity

Skills

Test automation

CI/CD integration

Java

JavaScript

Performance testing

API testing

Agile/SAFe testing

Public Trust citizenship

Education

Bachelor's degree in CS/SE or related

Master's degree

Tools

Selenium

JUnit

pytest

Jenkins

GitLab CI

GitHub Actions

JMeter

Gatling

Postman

REST Assured

Job description

Leidos is seeking a Test Engineer to join the Air Traffic Business Area within the Homeland Sector, supporting the development of the Leidos Common Automation Platform (L-CAP). L-CAP is a mission‑critical, future‑ready automation platform built on a hybrid cloud data mesh architecture, enabling next‑generation air traffic management capabilities. We are building with an AI‑first engineering mindset, embracing emerging AI capabilities and modern development practices to accelerate delivery, improve software quality, and continuously evolve how we design and build mission‑critical systems. This role operates within a SAFe/Agile framework as part of an Agile Release Train (ART) delivering iterative value across the program. This position supports government programs and requires the ability to obtain and maintain a favourable Public Trust investigation. This is a hybrid position requiring 3 days onsite and 2 days working from home, if you are located within a commutable distance (Less than 1 hour’s drive one‑way during normal traffic) from Gaithersburg, MD; Eagan, MN; or Egg Harbor Township, NJ. However, if you do not reside within a commutable distance, you may be considered for a 100% remote role.

What You’ll Do

• Design and implement test automation frameworks for microservices‑based platform components
• Build and maintain reusable test libraries and utilities for the L‑CAP test infrastructure
• Integrate automated tests into CI/CD pipelines ensuring continuous quality gates
• Conduct performance testing to validate system behavior under load and stress conditions
• Execute integration testing across platform services, APIs, and external system interfaces
• Develop test plans and strategies aligned with sprint and PI objectives
• Analyze defect patterns and test metrics to identify quality trends and improvement opportunities
• Collaborate with development and systems engineering teams on testability and quality requirements
• Support test environment configuration and test data management activities
• Mentor junior test engineers on automation practices and testing methodologies
• Design and execute test scenarios based on operational ATC workflows ensuring modernized services replicate legacy system behaviour
• Develop distributed service validation frameworks verifying inter‑service communication, data flow, and performance under operational conditions
• Implement data‑driven verification approaches supporting modernization of legacy automation functions
• Embrace an AI‑first engineering culture by actively adopting AI‑assisted development tools, automation, and modern engineering practices that improve productivity, code quality, and delivery velocity

Core Technical Qualifications

• Bachelor's degree in Computer Science, Software Engineering, or related discipline with 8+ years of experience, or Master's degree with 6+ years (additional experience, education and training may be considered in lieu of degree)
• Strong experience with test automation frameworks (Selenium, JUnit, pytest, or equivalent) and Java or JavaScript test development
• Expert integrating automated testing into CI/CD pipelines using Jenkins, GitLab CI, GitHub Actions, or similar tools
• High experience with performance, integration, and API testing for distributed systems using tools such as JMeter or Gatling
• Knowledge of distributed service testing, including service virtualization, contract testing, chaos engineering, and data‑driven test automation
• Experience with operational scenario‑based testing, behavioral validation, root cause analysis, and defect investigation
• Familiarity with Agile/SAFe testing, quality engineering principles, test management, and defect tracking tools
• Ability to obtain and maintain a Public Trust U.S. citizenship required
• Successful completion of background investigations as required by the government customer

Preferred / Desired Qualifications

• Python scripting and test development proficiency
• Experience testing microservices and event‑driven architectures
• Knowledge of containerized test environments (Docker, Kubernetes)
• Experience with API testing frameworks (REST Assured, Postman/Newman)
• Familiarity with security testing tools and practices
• Experience in aviation, defense, or safety‑critical testing domains
• Knowledge of test‑driven development (TDD) and behavior‑driven development (BDD)
• Experience with AI‑assisted development tools (e.g., code generation, automated testing, intelligent debugging)
• Experience testing legacy‑to‑modern migration verifying functional equivalence between old and new systems

Why Leidos?

You’ll work on systems where performance, precision, and reliability matter — every second. This is not experimental AI for prototypes. This is disciplined, responsible AI applied to mission‑critical software that supports national infrastructure. If you're excited by solving complex problems in regulated, real‑world environments — and using AI as a force multiplier rather than a shortcut — we'd like to talk.

ATMC If you're looking for comfort, keep scrolling.

Pay Range: Pay Range $92,300.00 - $166,850.00

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

Leidos Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026.