Test Engineer III

Job Summary:

At Mercury Systems, your work has real‑world impact. As part of a team building trusted, secure, and high‑performance technology for aerospace and defense missions, you'll help solve some of the toughest engineering challenges in the industry. Our servers and secure processing solutions power critical missions - from protecting national security to enabling next‑generation aerospace systems.

As a Test Engineer III, you'll be at the center of this mission: validating ruggedized systems that must perform flawlessly in extreme environments, ensuring reliability where it matters most. If you're excited by complex engineering problems, advanced technology, and work that directly supports those who protect our nation, this role offers the opportunity to make a meaningful difference every day.

The Test Engineer III will 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 which typically requires a minimum of 5 years of experience in testing similar systems

Prior experience with Aerospace, Defense, Government, or Military sectors

Proven ability to develop performance metrics and lead initiatives to achieve engineering and operational goals

Broad testing expertise across hardware, electrical, and software systems

Solid understanding of system and subsystem requirements & specification generation processes

Experience in developing and executing verification and validation test procedures

Hands-on experience testing ruggedized servers for harsh environments (e.g., extreme temperatures, shock, vibration)

Proficiency in secure software testing, including vulnerability assessments, penetration testing, and cryptographic module validation

Familiarity with military standards such as MIL-STD-810, MIL-STD-461, and MIL-STD-1275

General understanding of engineering principles and demonstrated application of those concepts with a focus on safety and regulatory compliance

Ability to obtain and maintain an active U.S. Secret Security Clearance

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

Preferred Qualifications:

Active U.S. Secret Clearance

Proficiency in LabVIEW, Python, Bash, C#, MATLAB, or other programming languages used for data collection and analysis

Familiarity with engineering lifecycle tools such as Jama, Jira, BitBucket

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

Requirements:

Why should you join Mercury Systems?

Mercury Systems is a technology company that makes the world a safer, more secure place. We push processing power to the tactical edge, making the latest commercial technologies profoundly more accessible for today's most challenging aerospace and defense missions. From silicon to system scale, Mercury enables customers to accelerate innovation and turn data into decision superiority. Headquartered in Andover, Massachusetts, Mercury employs more than 2,300 people in 24 locations worldwide. To learn more, visit mrcy.com

Our Culture

We are committed to making Mercury a great place to work, no matter where our employees are located. We offer a casual and enjoyable atmosphere that allows employees to learn and grow. We help and care for one another and work as one to achieve results for us and for our customers. We value communication and transparency, and strive to foster two-way dialogue at all levels of the organization. We are committed to lifelong learning, offering comprehensive skills training and tuition reimbursement. Whether you're just starting out on your career journey or you are an experienced professional, it's important to us that you feel recognized and rewarded for your contributions.

To find out more about Why Mercury?, or visit the Mercury Community or find answers to general questions at Mercury FAQs

(978) 256-1300

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Additional Details : Fulltime Equivalent Job Grade Salary Range for this position "• $75,000.00 - $150,000.00 annual salary for in-office or hybrid employees in FL, GA, IN, AZ, AL, MD or TX, and all remote employees • $84,000.00 - $168,000.00 annual salary for in-office or hybrid employees in VA, CA, NH or MA • $88,500.00 - $177,000.00 annual salary for in-office or hybrid employees in NJ"

Mercury considers a variety of factors to determine individual base salary offers to candidates, including:

the role and related responsibilities;

prior work experience;

education, training, skills and certifications;

internal equity with others employed by Mercury in similar roles;

geographic location; and

alignment with market data.

In addition to base salary, Mercury provides a variety of benefits for team members including:

bonus opportunities (or special incentives for sales positions);

health, life and disability insurance;

company-paid holidays and time off;

401(k) retirement plan;

discounted employee stock purchase plan;

tuition reimbursement; and

access to professional development and personal wellness platforms including LinkedIn Learning, Headspace, Aaptiv and Virgin Pulse.

Team members at the Director or Vice President level are also eligible to receive annual stock-based awards.

Mercury offers a 9/80 alternative work schedule that provides employees more opportunity for work/ life balance (available based off location)