Specialist, Mechanical Design Engineer
L3Harris
Cincinnati, OH · Posted October 24, 2026
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November 2026
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AI use among mechanical engineers is little observed so far. Measured exposure for mechanical engineers: 8% (little observed).
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About the job
Job Title: Specialist, Mechanical Design Engineer
Job Code: 45129
Job Location: Cincinnati, OH
Schedule: 4/10 - Employees work 10 hour days, 4 days a week
About L3 Harris Technologies:
L3Harris Technologies is an agile global aerospace and defense technology innovator, delivering end-to-end solutions that meet customers’ mission-critical needs. The company provides advanced defense and commercial technologies across space, air, land, sea and cyber domains. L3Harris has approximately $18 billion in annual revenue and 47,000 employees, with customers in more than 100 countries.
L3Harris Fuzing and Ordnance, Inc., a division of L3Harris, provides precision electronic components, subsystems, and systems for the DOD and international allies. L3Harris FOS specializes in the design and manufacture of fuzes, ignition safety devices, proximity sensors, GPS navigation systems, aerospace status indicators, and range and test solutions.
Headquartered in Cincinnati, Ohio, L3Harris FOS’ primary manufacturing facility was specifically designed and constructed for the manufacture of fuzing and ordnance systems and precision electronic components. L3Harris is a partner you can count on to deliver quality products and solve your toughest technical challenges. The Cincinnati location has flexible manufacturing - capable of manufacturing a variety of products from rates of 40,000/month down to individual production units for development efforts, dual identical modern Surface Mount Technology (SMT) assembly lines for automated electronic manufacture, and on-site inspection and test capabilities to perform all required environmental conditioning test procedures. We offer competitive benefits, an alternative 4/10 work schedule, and the opportunity to work with a talented and diverse group of professionals.
Job Description:
Applies mechanical engineering principles to support, and maintain, L3Harris FOS product lines during design, development, and production. This role supports design, development, and testing of new products; interacting with a multidisciplinary design team and working within established design guidelines to ensure products meet or exceed customer specifications. In addition, this role supports production of existing products, working with manufacturing and quality to troubleshoot issues, document changes, and adhere to AS9100 and ISO9001 quality standards.
Essential Functions:
Act as lead mechanical engineer on various programs holding the responsibility for ensuring the designs and product performance meet customer specifications.
Apply mechanical engineering principles to generate new designs, or modify existing designs, in accordance with company design guidelines and procedures.
Apply configuration management principles to design documentation and technical data packages.
Generate, modify, and interpret engineering drawings, specifications, compliance matrices, etc. in accordance with industry, company, and customer requirements.
Collaborate with engineering analysts to conduct finite element analysis on new designs showing compliance to internal guidelines, DoD requirements and customers' specifications.
Participate in failure investigations, where appropriate, related to design, production build processes, and customer returns.
Prepare materials for internal and customer design reviews, and effectively present material to design review teams.
Devise design verification test sequences to demonstrate compliance with specified performance environments (temperature, vibration, shock, acceleration, etc). Prepare associated test plans, and test reports.
Participate in efforts to drive process improvements which increase efficiency and lower cost.
Support active production, which includes but is not limited to test fixture and tooling designs, product trouble shooting, document and drawing updates, process control improvements, and product design improvements.
Maintain a positive work atmosphere by acting and communicating in a manner that is cooperative and supportive of customers, co-workers and managers.
Ability & willingness to be adaptable and accept feedback as part of the design review process.
Other duties as assigned.
Must be able to obtain a US Security Clearance.
Qualifications:
Bachelor’s Degree in Mechanical, Aerospace or other related Engineering field and a minium 4 years of prior relevant work experience. Graduate degree and a minimum of 2 years prior relevant work. In lieu of a degree, minimum 8 years of prior related experience.
Professional experience with CAD software such as Solid Edge, SolidWorks, NX etc.
Professional experience with GD&T application and interpretation.
Professional experience with dimensional stack-up/tolerance analysis.
Professional experience with manufacturing methods and design for manufacturability (DFMA).
Preferred Additional Skills:
Proficient knowledge of physics, engineering mechanics, fatigue, and mechanics of materials.
Proficient knowledge of thermodynamics and heat transfer.
Proficient knowledge of dynamics and vibration (time and frequency domains).
Knowledgeable in DoD and MIL standards/specifications or other highly regulated industry.
Experience with AS9100 and ISO 9001 quality standards.
Knowledgeable in engineering materials and 3D printing.
Familiarity with finite element analysis tools and methods.
Knowledgeable in statistical analysis.
Master of Science in Mechanical or Aerospace Engineering.
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