Test Engineer III - Chantilly, VA

Job Summary

Mercury Systems is seeking a Test Engineer III to lead test efforts in developing and executing server systems for mission critical aerospace and defense applications. This role plays a pivotal part in ensuring product reliability, performance, and security across the full engineering lifecycle from concept to sustainment.

• Implement standardized system testing practices across Mercury's ruggedized servers and secure software product lines.
• Design and implement robust test procedures that meet military standards (e.g., MIL-STD-810, DO-461, DO-167, DO-178C, DO-254) and cybersecurity requirements.
• Oversee and conduct functional, environmental, stress, and security testing of hardware and software systems, ensuring performance in extreme conditions and mission‑critical environments.
• Collaborate with software development teams to integrate and validate secure software solutions.
• Partner with systems engineering, hardware design, and software development teams to align test objectives with product requirements; coordinate with program managers to meet timelines and deliverables.
• Ensure all testing procedures developed comply with strict security protocols and regulatory standards, leveraging active security clearance for classified projects.
• Support the development of tools to streamline test analysis, reporting, and documentation.
• Assist in defining and developing tools to streamline test analysis and reporting.
• Establish and maintain test requirements for test equipment and work with Test Support to bring test equipment to operational status.
• Prepare comprehensive test documentation including acceptance test plans, test reports, and performance metrics for internal stakeholders and external customers, including government agencies as well as present findings to senior leadership and clients.
• Support the standardization of systems used to track testing issues and document results.
• Collaborate with Mission Assurance teams to conduct root cause analyses for issues identified during testing and sustainment.

• Bachelor of Science degree in Engineering or a related field. Equivalent experience will be considered.
• Typically requires a minimum of 6–10 years of experience in testing similar systems.
• Experience with Aerospace, Defense, Government, or Military sectors.
• Experience developing performance metrics and leading initiatives to achieve engineering and operational goals.
• Experience road testing expertise across hardware, electrical, and software systems.
• Experience understanding of system and subsystem requirements & specification generation processes.
• Experience in developing and executing verification and validation test procedures.
• Experience testing ruggedized servers for harsh environments (e.g., extreme temperatures, shock, vibration).
• Experience in secure software testing, including vulnerability assessments, penetration testing, and cryptographic module validation.
• Experience with military standards such as MIL-STD-810, MIL-STD-461, and MIL-STD-1275.
• Experience understanding of engineering principles and demonstrated application of those concepts with a focus on safety and regulatory compliance.
• Experience in LabVIEW, Python, Bash, C#, MATLAB, or other programming languages used for data collection and analysis.
• Experience with engineering lifecycle tools such as Jama, Jira, Bit Bucket.
• Ability to obtain and maintain an active U.S. Secret Security Clearance.

• Active U.S. Secret Clearance.
• Skilled in documentation and collaboration platforms, including Confluence and SharePoint.
• Demonstrated leadership experience with the ability to guide Integrated Product Teams (IPTs) through ambiguity and tight deadlines.
• Experience supporting both military and commercial programs.
• Working knowledge of military and aerospace standards including MIL-STD-810, MIL-STD-461, DO-178C, and DO-254.
• Hands‑on experience with environmental test equipment, including chambers used for hardware validation.

"This position requires you to have or can obtain a government security clearance. Security clearances may only be granted to U.S. citizens."

Fulltime…