Demo

Test Engineer III

Mercury Systems
Torrance, CA Full Time
POSTED ON 4/3/2026
AVAILABLE BEFORE 6/2/2026

 

Job Summary:

Mercury Systems is seeking a Test Engineer III to lead test efforts in our data processing and avionics 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:

  • Ensuring test systems comply with quality requirements, reliability, and regulatory compliance
  • Work with cross-functional development teams to ensure that products are designed to facilitate testability including qualification, verification and validation requirements
  • Develop, specify and/or procure test equipment that meets quality objectives, design margins and the needs of manufacturing
  • Develop and write test documentation such as compliance matrices; Acceptance Test Procedures (ATP), Qualification Test Procedures (QTP), and Functional Test Procedures (FTP) using test standards such as MIL-STD-810G & H, MIL-STD-704A, and MIL-STD-461F & G
  • Oversee and conduct functional, environmental, stress, and security testing of hardware and software systems, ensuring performance in extreme conditions and mission-critical environments.
  • Work independently under minimal supervision and guidance to perform tasks of substantial complexity and conduct testing activities on site and at testing contract facilities
  • Produce test reports, presentation, and CDRL’s for contractual deliverables
  • Train/cross-train test and troubleshooting techniques with Production test team
  • Troubleshoot systems and circuit card assemblies using relevant electrical, mechanical, and analytical tools to identify root cause and resolve technical issues.
  • Lead the troubleshooting activities, Investigate the cause of the failures and fix the defect at top level assembly, sub-level assembly, PCBA board level, components, and or test equipment
  • Collaborate with Mission Assurance teams to conduct root cause analyses for issues identified during testing and sustainment.

Required Qualifications:

  • Typically requires a bachelor’s degree in electrical engineering, computer science, manufacturing engineering or equivalent experience
  • Typically requires 3-5 years of experience testing electrical hardware or other military based systems
  • Experience with mixed-signal Printed Circuit Board Assembly (PCBA) and system validation test development 
  • Experience in developing and executing verification and validation test procedures.
  • Experience testing ruggedized servers for harsh environments (e.g., extreme temperatures, shock, vibration).
  • Ability to read and understand circuit and wiring diagrams, technical specifications and electronics test procedures
  • Good understanding of manufacturing processes with the ability to work on multiple projects in a highly demanding environment
  • Experience understanding system and subsystem requirements & specification generation processes
  • Knowledge of a wide variety of electronics test and analyzing equipment including oscilloscopes, analyzers, power supplies, meters and any other special electronics test equipment necessary for testing, analyzing and/or troubleshooting/repairing
  • Experience understanding engineering principles and demonstrated application of those concepts with a focus on safety and regulatory compliance.
  • Experience in LabVIEW, Python, Bash, C#,C , MATLAB, or other programming languages used for data collection and analysis.
  • Experience with engineering lifecycle tools such as Jama, Jira, BitBucket.
  • This role is 100% on-site and based in Torrance, CA.

 

Preferred Qualifications:

  • Active U.S. Secret Clearance.
  • Experience with military standards such as MIL-STD-810, MIL-STD-461, and MIL-STD-1275.
  • Experience with Aerospace, Defense, Government, or Military sectors.
  • Skilled in documentation and collaboration platforms, including Confluence and SharePoint.
  • Experience with engineering lifecycle tools such as Jama, Jira, BitBucket.
  • 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 obtain a government security clearance. Security clearances may only be granted to U.S. citizens.

 

#LI-RL1

“This position requires you to access information that is subject to U.S. export regulations.  You may only access such information if you are a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. government.”

 

Salary.com Estimation for Test Engineer III in Torrance, CA
$98,452 to $114,106
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