JobsMechanical EngineerUnited StatesPrincipal Mechanical Engineer

Twenty-Six Defense

Posted 6 days ago · Jobs at Twenty-Six Defense

Principal Mechanical Engineer

Twenty-Six Defense · Merrimack, New Hampshire, United States

Full-timeOn site5-10 yrsListed as no visa sponsorshipDefense and Space Manufacturing
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In short

The Principal Mechanical Engineer is responsible for researching, designing, developing, and testing complex mechanical systems and hardware assemblies. They must also oversee fabrication, ensure manufacturability, and communicate design changes to management and production teams.

What they're looking for

MUST-HAVE SKILLS

Mechanical engineering3D ModelingPro/ECatiaSolidworksEngineering analysisANSYSSolidworks Simulation

ALSO MENTIONED

Mechanical EngineeringDefenseAviationChassis designHardware assemblyManufacturingFabricationEngineering drawingsMechanical testingStructural integrity

Candidates must hold at least a Bachelor's degree in an applicable technical discipline and possess 8+ years of relevant professional experience. Proficiency in 3D modeling software and engineering analysis tools is required.

About the employer

Elbit Systems of America

We provide innovative solutions that protect and save lives. Learn more about us at ElbitAmerica.com. #ElbitAmerica · hiring as Twenty-Six Defense

Elbit Systems of America is a leading provider of high performance products and system solutions focusing on the defense, homeland security, commercial aviation and medical instrumentation markets. With facilities throughout the United States, Elbit Systems of America is dedicated to supporting those who contribute daily to the safety and security of the United States. Elbit Systems of America, LLC is wholly owned by Elbit Systems Ltd. (NASDAQ: ESLT), a global electronics company engaged in a wide range of programs for innovative defense and commercial applications.

INDUSTRY
Defense and Space Manufacturing
COMPANY
Public Company
HEADQUARTERS
Fort Worth, TX
SIZE
1,001-5,000on LinkedIn
OFFICES
5 on LinkedIn
OPEN HERE
2 roles

KNOWN FOR

Defense ElectronicsHomeland SecurityCommercial AviationMedical InstrumentationBorder SecurityDefense Contractor

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Questions about this role

Is this Twenty-Six Defense role remote?
Tagged on site.
Does it sponsor visas?
Listed as no visa sponsorship.
What experience does it ask for?
Listed as 5-10 years.

The posting, in full

Twenty-Six Defense, headquartered in Fort Worth, Texas, is a leading provider of high-performance products, system solutions, and aftermarket support services focusing on the defense, homeland security, and commercial aviation markets. With facilities throughout the U.S., Twenty-Six Defense supports those who contribute to the national security of the United States. Twenty-Six Defense is wholly owned by Elbit Systems Ltd. (NASDAQ: ESLT and TASE: ESLT), a global high-technology company engaged in a wide range of programs for innovative defense and commercial applications.

▶ READ THE FULL POSTING

Company Information

Twenty-Six Defense, headquartered in Fort Worth, Texas, is a leading provider of high-performance products, system solutions, and aftermarket support services focusing on the defense, homeland security, and commercial aviation markets. With facilities throughout the U.S., Twenty-Six Defense supports those who contribute to the national security of the United States. Twenty-Six Defense is wholly owned by Elbit Systems Ltd. (NASDAQ: ESLT and TASE: ESLT), a global high-technology company engaged in a wide range of programs for innovative defense and commercial applications.

Job Summary: The Principal Mechanical Engineer researches, plans, designs, develops, analyzes and tests a variety of mechanical equipment items and systems, including chassis, hardware assembly, installation hardware and installation design.

Responsibilities and Tasks

  • Ability to apply practical engineer science, design and technology.
  • Understanding of current manufacturing processes and how they relate to design.
  • Conceptualize, design and oversea fabrication of efficient complex mechanical systems and analyze for manufacturability and cost.
  • Be able to understand and produce engineering drawings.
  • Create procedures for carrying out various mechanical testing.
  • Communicate changes in design and assembly with management and production staff.
  • Estimate cost to produce design including material and labor costs (assembly and fabrication).
  • Calculate mechanical requirements to meet system design specifications.
  • Understanding of static and dynamic events and how they relate to structural integrity.
  • Ability to design electronic packages for harsh environments and maintain required reliability.
  • Basic understanding of electronic circuits and their effect on mechanical performance.
  • Working knowledge of techniques to mitigate EMI issues.
  • Other related duties as assigned by supervisor.

Education, Experience, License, or Certification

  • Bachelor's degree is required
  • Master's degree is preferred
  • Specific Degree Field Required: Aerospace, Software/Computer Science, Electrical, Electronic, Electro-Optical, Mechanical, or other applicable technical discipline
  • 8+ years of relevant professional experience
  • Training Pre-requisites (Within One Year of Taking Position):
  • ESD
  • Safety Training, as dictated by Safety Department or required by program

Skills and Abilities

  • 3D Modeling (Pro/E, Catia, Solidworks, etc. Solidworks preferred).
  • 3D Engineering analysis tools. (ANSYS/Solidworks Simulation etc.).
  • Microsoft Office including the use of Excel and an engineering tool.

Here Are Some of the Great Benefits We Offer:

  • Most locations offer a 9/80 schedule, providing every other Friday off
  • Competitive compensation & 401(k) program to plan for your future
  • Robust medical, dental, vision, & disability coverage with qualified wellness discounts
  • Basic Life Insurance and Additional Life & AD&D Insurances are available
  • Flexible Vacation & PTO
  • Paid Parental Leave
  • Generous Employee Referral Program
  • Voluntary Benefits Available: Long-Term Care, Legal, Identity Theft, Pet Insurance, and more
  • Voluntary Tricare Supplement available for military retirees

This job description does not list all the duties of the job. You may be asked by your supervisors or managers to perform other duties. The employer has the right to revise this job description at any time. The job description is not an employment contract. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions of this position. Twenty-Six Defense is an equal opportunity employer as to all protected groups, including protected veterans and individuals with disabilities.

*For Virginia-based positions only* In accordance with Virginia DOL requirements, the listed salary range reflects the anticipated base pay range for this role. Actual compensation will be determined based on factors including skills, experience, education, certifications, business needs, internal equity, and geographic location. Compensation may vary in different locations based on market conditions and cost-of-labor considerations.

Please ensure your résumé meets the Dayforce upload requirements. Dayforce supports résumé files up to 4 MB. To avoid upload issues, please: save your résumé as a PDF, remove photos/graphics/embedded objects, ensure the file is under 4 MB, and avoid password‑protected PDFs. If you encounter difficulties, try using a different browser (Chrome, Edge, or Safari), an incognito/private window, clearing browser cache, or disabling browser extensions. If you are unable to upload your resume for parsing, you may manually add resume details and/or attach your resume to the Additional Documents section. If you have exhausted all troubleshooting issues above, you may contact TechnicalSupport@26Defense.com. NOTE: Simply emailing a resume to this inbox will not be considered an official application to any job posting.

APPLY ON TWENTY-SIX DEFENSE'S CAREERS SITE ↗
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This listing comes from Twenty-Six Defense's own careers site. Apply links go to the employer. Company facts are from Elbit Systems of America's public profile. Last checked 5 Nov 2026.