Principal Mechanical (Design) Engineer

Company Information:

Elbit America is a leading provider of high-performance products, system solutions, and support services 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 and TASE: ESLT), a global high-technology company engaged in a wide range of programs for innovative defense and commercial applications. For additional information, visit: ElbitAmerica.com or follow us on YouTube.

Fueled by more than 800 talented employees and a proud 65-year legacy of night vision production excellence, Elbit America’s Warfighter Systems business is rooted in the heart of Virginia’s Roanoke Valley. Surrounded by the scenic beauty of the Blue Ridge Mountains, you’ll find a unique blend of southern hospitality, outdoor adventure, and the energy of a thriving city – all alongside a purpose you can be proud of coming to work each day.

As a world leader in low-light sensor technology, the Warfighter Systems team is engineering the future of image intensifiers and night vision goggle systems as we enter a new era of the networked battlespace. Trusted by the U.S. and nearly 100 allied countries, our technology provides support to those in harm's way during the most critical moments with one goal in mind: bring them home safely.
The work our employees perform each day plays a direct role in national security, and our shared purpose is what truly makes Warfighter Systems so extraordinary. Come join our collaborative team where each voice is valued in a setting where you can thrive, develop, and make a true impact!


Job Summary:
Leads the mechanical design of electro optical (EO) systems and opto mechanical assemblies from concept through production. Designs major components or major portions of a functional system to develop or improve products and facilitate manufacturing operations. Translates customer and market requirements into robust mechanical architectures, balancing performance, manufacturability, cost targets, and configuration control. Utilizes CAD/PLM tools to create detailed models, drawings, and documentation; performs mechanical and thermal analyses; and works as a cross functional liaison to ensure seamless system integration and production readiness. Coaches and trains junior and senior engineers, establishes reusable design patterns and playbooks, and serves as final technical approver for critical designs.

Responsibilities and Tasks:
• Own the mechanical architecture and design of electro optical enclosures, precision mounts, thermal frames, seals, and structural elements. Ensure optical alignment stability, thermal management, EMI/ESD robustness, and environmental durability.
• Create 3D CAD models, detailed drawings, and engineering documentation per internal standards (Creo Parametric preferred; Windchill PLM).
• Generate system level mechanical layouts and thoroughly detailed component designs with minimal supervision. Perform component level and assembly level tolerance analyses and stack ups to guarantee fit, function, and alignment.
• Analyze and optimize designs using structural (FEA) and thermal simulations (Ansys or Creo Simulation), material selection, finishes, and fabrication processes to meet performance and reliability goals. Translate CTQs into tolerance budgets and verify with analytical stack ups and build data.
• Design for manufacturing and cost: apply DFM/DFA and Design to Unit Production Cost (DTUPC) principles. Partner with manufacturing engineering to design or revise tooling, fixtures, and assembly methods.
• Document Critical to Quality (CTQ) characteristics for purchased parts and assemblies. Define drawing GD&T and datum strategies; Lead tolerance analysis, approve component level and assembly level stack ups, select worst case or statistical approaches, and correlate tolerance budgets to supplier capability and inspection plans
• Own supplier technical engagement: define capability targets (Cp/Cpk) for CTQs, review first articles, and resolve process gaps; escalate and lead corrective actions.
• Prepare for and lead/contribute to design reviews (internal and external), risk assessments (DFMEA/PFMEA), and reliability planning; participate in peer reviews of complex mechanical approaches. Present tolerance budgets, key stack ups, and inspection plans.
• Prototype, assemble, and debug early units; support fabrication, inspection, and iterative refinement; assist production during initial builds and resolve build issues rapidly. Measure critical dimensions and update drawings/processes to close gaps.
• Mentor and train: provide structured training for