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Salary
≈ $94k – $179k per year (Estimated)
Location
In office (Mason)
Seniority
Senior · 10+ years exp

Confirmed on the employer's own hiring board on Oct 2, 2026. First seen by Alion on Oct 1, 2026.

Overview
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Impact
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L3Harris builds defence electronics, uncrewed maritime vessels and space systems. Its unmanned surface vehicles run long autonomous naval missions. The company is one of the largest United States defence contractors.

Job Title: SeniorSpecialist, Mechanical Engineering

Job Code: 44317

Job Location: Mason, OH - On Site

Job Schedule: 9/80 - Employees work 9 out of every 14 days - totaling 80 hours worked - and have every other Friday off

Job Description:

L3Harris Space & Sensors Division, headquartered in Mason, Ohio, designs, develops, and manufactures complex systems (electronic, avionics, transceivers, transmitters, electro-optical, and electro-mechanical) for the defense, aerospace, and commercial markets. L3Harris is a recognized leader in Electro-Optical technologies that enable systems to support surveillance, reconnaissance, threat detection, and self-protection missions.

We are seeking a Senior Mechanical Engineer with strong knowledge of job area and broad knowledge of project management. Will manage complex projects or processes with general oversight. Communicates within and outside of own function to gain cooperation on operational processes, practices, and procedures. Makes moderate to substantial improvements to systems and processes. Contributes to achievement of departmental goals and operating plans with direct impact on the departmental results.

Mechanical Engineers at in the L3Harris Space & Sensors Division are responsible for a wide range of assignments, including design, analysis, and test of opto-mechanical, and electro-optical systems. These systems have demanding functional and performance requirements and must operate in extremely challenging environments. Mechanical Engineers will follow the product from conceptualization through hardware integration and testing, and will interface with Designers, Systems Engineers, as well as other discipline engineers, Program Managers and customer counterparts. Duties may include CAD design, detailed finite element analysis, vendor and integration support, as well as hardware characterization testing.

The selected individual will be responsible for various analyses on multiple prototype development teams. The individual must demonstrate the ability to apply engineering principles and fundamental analysis techniques to characterize and evaluate hardware performance as it relates to the development of opto-mechanical and electro-optical hardware systems.

Essential Functions:

  • Provide technical leadership and oversight to multiple cross-disciplinary Engineering design teams. Teams will be tasked with developing various types of ruggedized opto-mechanical and electro-optical systems and technologies.
  • Oversee or directly perform the conceptualization and development of working designs, computer models, layouts and drawings using MCAD/MCAE tools.
  • Develop, review and approve engineering documentation, including product specifications, drawings, assembly procedures, and test plans/procedures. A comprehensive understanding of GD&T (ASME Y14.5) and DFMA is required. Experience with tolerance stack methodology is preferred.
  • Perform mechanical analyses of components and subsystems employing both classical and Finite Element methods. Analyses may be quasi-static, kinematic and/or dynamic in nature, and are intended to characterize or verify the structural integrity, stability and performance of the hardware.
  • Prepare and review schedules, specifications, process standards, and other contract documentation to plan the successful execution of multi-year, multi-million dollar development efforts.
  • Participate (as a presenter and/or reviewer) in internal and customer design reviews intended to demonstrate design conformance to all derived requirements and customer specifications.
  • Assist the Purchasing Dept. with procurement of product hardware including vendor certification, vendor oversight, product source inspection, and nonconformance disposition, as required.
  • Support the assembly, integration and test of the product or prototype hardware. A working understanding of optical systems and hardware integration is a plus. Familiarity with military testing to MIL-STD-810 and MIL-STD-461 is desired.
  • Experience with optics, lens design and common opto-mechanical alignment techniques is required. Experience with ultra high vacuum (UHV) processing and cryogenic compressor design/production methods is desirable (not mandatory).
  • Experience with CAD tools Solidworks/Solid Edge is required.
  • Proficiency with GD&T and drawing standards per ASME (Y14.5) is required.
  • Proficiency with structural, structural dynamics, or thermal analyses is required. Familiarity with FEA tools, particularly FEMAP/NX Nastran and/or ANSYS are preferred.
  • Proficiency with computer design tools (Teamcenter, MathCAD, Matlab) is preferred.
  • Meets eligibility requirements to access US classified information.
  • Ensure quality through adherence to the Quality Systems Manual, applicable Standard Work Instructions and other standards invoked internally or contractually.
  • Adhere to budget and schedule commitments.
  • Lead technical proposal efforts as part of a program capture team: Conceptualize suitable architecture and prepare input text and figures for the proposal technical volume. Estimate the labor required to execute on proposed projects.
  • 5% Travel expectation (minimal)

Qualifications:

  • Bachelor’s Degree and minimum 6 years of prior relevant experience.
  • Graduate Degree and a minimum of 4 years of prior related experience.
  • In lieu of a degree, minimum of 10 years of prior related experience.
  • 6+ years of experience in relevant prototype development and production required, experience w/ hardware development for aerospace applications is strongly preferred, 4+ years with a Master’s degree

Preferred Additional Skills:

  • EO / IR experience is a plus
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