Role & seniority: Test Engineer III (mid-senior level) leading test efforts for mission-critical aerospace/defense products.

Stack/tools: Ruggedized server testing; MIL-STD/DO compliant testing; secure software testing; tools/languages: LabVIEW, Python, Bash, C#, MATLAB; engineering lifecycle tools: Jama, Jira, Bitbucket; documentation: Confluence, SharePoint.

Top 3 responsibilities

Implement standardized system testing practices across rugged servers and secure software.
Design/execute verification and validation tests (functional, environmental, stress, security) per military standards and cybersecurity requirements.
Collaborate with software, hardware, and systems teams; prepare test documentation and metrics; coordinate with program managers to meet timelines.

Must-have skills

6–10 years in testing complex hardware/software systems; experience with aerospace/defense or government sectors.
Experience with MIL-STD-810, MIL-STD-461, MIL-STD-1275; DO-178C/DO-254 familiarity; secure software testing (vulnerability assessments, penetration testing, crypto modules).
Ruggedized server testing in harsh environments; road testing across hardware/electrical/software.
Programming/data-collection tools: LabVIEW, Python, Bash, MATLAB, C#; experience with Jama, Jira, Bitbucket.
Ability to obtain/maintain active U.S. Secret Security Clearance.

Nice-to-haves

Active Secret Clearance; leadership guiding Integrated Product Teams; experienc

Full Description

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.

Job Responsibilities

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 working 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.

Required Qualifications

Bachelor of Science degree in Engineering or a related field. Equivalent experience of 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 lead 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

Test Engineer III