By Light Professional IT Services LLC readies warfighters and federal agencies with technology and systems engineered to connect, protect, and prepare individuals and teams for whatever comes next. Headquartered in McLean, VA, By Light supports defense, civilian, and commercial IT customers worldwide.

By Light Professional IT Services is seeking a Test Engineer to support the Persistent Cyber Training Environment (PCTE) and RangeOS software integration and validation efforts in Orlando, FL.

The selected candidate will join a multi-disciplinary engineering team responsible for grey-space testing of software and networked cyber range systems—ensuring readiness, interoperability, and performance of DoD cyber training capabilities prior to field release.

This role focuses on hands-on software and systems testing in a classified and isolated environment, validating functional performance, interoperability, and integration across the PCTE ecosystem. You’ll work closely with developers, DevSecOps engineers, and mission users to deliver reliable, high-performance training environments for the U.S. Cyber Command and DoD components.

• Execute functional, integration, regression, and performance testing of PCTE and RangeOS software.
• Develop and maintain automated test scripts for CI/CD pipelines and continuous integration environments.
• Validate software builds, environment deployments, and range configurations prior to release to systems integrator.
• Conduct end-to-end testing of cloud-based microservices, user interfaces, and backend APIs supporting cyber range training events.
• Perform verification and validation (V&V) activities aligned with Agile and DevSecOps lifecycle practices.
• Support test readiness reviews (TRRs), defect triage meetings, and capability assessments.
• Generate and maintain detailed test documentation, including test cases, procedures, reports, and traceability matrices.
• Collaborate with system engineers, developers, and cyber operators to reproduce, isolate, and resolve issues in simulated mission scenarios.
• Apply systems-level thinking to evaluate training platform performance, usability, and security.
• Participate in sprint planning, retrospectives, and other Agile ceremonies as a contributing member of the engineering team.

• Bachelor’s degree in Computer Engineering, Computer Science, Systems Engineering, or related field.
• IAT Level II certification in accordance with DoDD 8570.
• Minimum of 5+ years of experience in software or systems testing, including functional, performance, and integration testing.
• Familiarity with grey-space or isolated testing environments (classified, controlled, or emulated networks).
• Experience with Continuous Integration / Continuous Delivery (CI/CD) pipelines and tools such as Jenkins, GitLab CI, or similar.
• Strong understanding of Linux-based systems, network configuration, and virtualization (VMware, KVM, Docker).
• Experience validating cloud-based or microservices-based architectures.
• Working knowledge of Agile and DevSecOps methodologies.
• Ability to interpret software requirements and translate them into testable acceptance criteria.
• Proficiency in scripting or automation (Python, Bash, or similar).

• Experience supporting PCTE, RangeOS, or other DoD cyber range programs.
• Background in Cybersecurity, Modeling & Simulation, or Distributed Interactive Simulation (DIS) environments.
• Experience with automated test frameworks, REST API testing tools (e.g., Postman, Robot Framework, pytest).
• Familiarity with container orchestration platforms (Kubernetes, OpenShift).
• Experience integrating test results into CI/CD dashboards and automated reporting.
• CompTIA Security+, CEH, or other relevant certifications.
• Familiarity with DoD software accreditation, RMF, and secure deployment practices.

• Active Secret clearance required; TS/SCI strongly preferred.