Software Test Engineer III

Mid-Senior Level | $75,000 - $95,000 | Huntsville, AL | Active Secret Clearance Required Lead testing and validation of software that evaluates missile defense threats-ensuring Ground Fire Control systems operate reliably to defend the nation. A Day in the Life - What you'll do

• Design and execute advanced software test procedures supporting the Ground Weapons System (GWS) and Ground Fire Control (GFC) mission software.
• Validate complex software capabilities including advanced mathematics and physics-based algorithms used in missile defense operations.
• Develop and lead test planning activities including test plans, procedures, and automated test strategies.
• Perform integration and verification testing across a large-scale codebase (~1.5 million lines) supporting missile defense threat evaluation systems.
• Analyze software behavior and test results to identify defects, perform root cause analysis, and recommend corrective actions.
• Collaborate closely with software engineers, system engineers, and mission stakeholders to validate new capabilities and ensure mission readiness.
• Support execution of mission software testing within secure development environments and operational testing events.
• Participate in technical discussions, reviews, and engineering briefings supporting program development and deployment.
• Travel up to 10% to support program needs, testing activities, and mission operations.

• Bachelor's degree in a STEM (Science, Technology, Engineering, or Mathematics) discipline from an accredited university.

• 5 years of related software testing or engineering experience with a Bachelor's degree

• 3 years of related experience with a Master's degree

• 1 year of related experience with a PhD

• Working knowledge of system design, requirements development, use cases, and advanced test planning

• Experience developing test plans, procedures, and leading software test events

• Recent experience with software testing or system integration

• Experience with object-oriented programming languages

• Knowledge of Python and automation scripting

• Strong communication skills for technical collaboration, reporting, and presentations

• Ability to analyze complex systems and translate technical concepts into test documentation and mission reports

• Ability to work independently and contribute leadership within collaborative engineering teams

• Ability to support an in-person / closed-area development environment

• Ability to travel up to 10% to support mission needs

• Active in-scope DoD Secret security clearance required at time of application Preferred Qualifications

• Experience supporting the Missile Defense Agency Ground-Based Midcourse Defense (GMD) program

• Experience with configuration management tools such as Git, GitLab, or Bitbucket

• Understanding of containerized environments and orchestration tools such as Podman, Docker, or Kubernetes

• Experience with Eggplant test automation tools

• Experience performing root cause analysis and analyzing large system log files

Premium Health, Dental & Vision Insurance 401(k) with 6% Company Match Flexible PTO & Work Schedule Education & Certification Reimbursement Support for Military Leave Work-Life Balance & Traditional Family Values Your future, your flexibility, your well-being - we invest in you. Apply and let's connect.

Caribou Thunder is a HUBZone-certified small business providing advanced technical and engineering services to the U.S. Department of War and its mission partners. 35+ states and 20+ countries. We've delivered trusted solutions for over two decades - strengthening national readiness across missions on land, undersea, in the air, and throughout LEO, MEO, GEO, and deep space. Why Caribou Thunder? TEAM THUNDER - Mission Focused. Delivery Proven. Ready to Serve. Employee Advocacy Mission Proven Global Reach Skilled Teams Modern Tools Empowering Culture Our engineers and innovators ensure capability from sea floor to space frontier - delivering on time, maintaining compliance, and performing with precision in high-consequence environments. We specialize in Engineering Services, Cybersecurity, Software Development, Modeling & Simulation, Digital Engineering, and Artificial Intelligence - disciplines powering the nation's most complex technical missions. Employee Advocacy + Benefits Our people are the heart of Caribou Thunder. We invest in their growth, flexibility, and well-being - knowing their success drives ours.