Secure Software Developer Jobs in New Hampshire (NOW HIRING)

Job Summary:

At Mercury Systems, your work has realworld impact. As part of a team building trusted, secure, and highperformance 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 nextgeneration 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 EngineerIIIwill 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 whichtypically requires a minimum of 5 years of experience in testing similar systems

• Prior experience withAerospace, 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 haveorcanobtaina 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

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 aboutWhy Mercury?, or visit the Mercury Community or find answers to general questions at Mercury FAQs

Mercury Systems is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex (including pregnancy), sexual orientation, gender identity, national origin, genetic information, creed, citizenship, disability, protected veteran or marital status.

As an equal opportunity employer, Mercury Systems is committed to a diverse workforce. In order to ensure reasonable accommodation for individuals protected by Section 503 of the Rehabilitation Act of 1973, the Vietnam Veterans' Readjustment Act of 1974, and Title I of the Americans with Disabilities Act of 1990, applicants that require accommodation in the job application process may contact the number below for assistance.

(978) 256-1300

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