Sr Associate, Mechanical Engineering

Role details

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech.

With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Sr Associate, Mechanical Engineering – Composite Case Design Job Code: 46800 Job Location: Huntsville, AL; 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 is seeking a Sr Associate Mechanical Design Engineer to support the design and development of filament‑wound composite cases for solid propulsion and controllable solids systems.

This role contributes to component- and system-level design activities involving carbon fiber epoxy materials, pressure vessel design, and filament winding processes. The position requires practical knowledge of Classical Lamination Theory and composite manufacturing methods, along with the ability to work under moderate supervision to execute design tasks and meet technical objectives. The selected candidate will support engineering activities across design, analysis, production, and qualification testing for composite case hardware.

Essential Functions

• Support mechanical design efforts for filament‑wound composite cases, propulsion systems, and related components.
• Develop design concepts, 3D models, and detailed manufacturing engineering drawings.
• Perform trade studies and prepare component specifications, procedures, and supporting documentation.
• Collaborate with analysis, manufacturing, project engineering, quality, and customer support teams to ensure design feasibility and producibility.
• Plan and execute design assignments within an Integrated Product Team (IPT) environment.
• Support production activities at the shop floor and supplier locations, including evaluation of nonconforming hardware and participation in process reviews.
• Support engineering drawing and specification updates through configuration control processes.
• Participate in environmental and qualification testing, including pathfinder, subscale, component, and system-level tests.
• Prepare and present technical presentations and engineering reports for internal and external stakeholders.
• Ability to obtain and maintain a U.S. Secret Security Clearance.

Minimum Qualifications

• Bachelor’s Degree and 2 years of mechanical engineering or related experience; OR Graduate Degree and 0–2 years of related experience; OR in lieu of a degree, 6 years of mechanical engineering or related experience. Preferred Additional Skills
• Degree in Mechanical or Aerospace Engineering.
• Practical knowledge of composite materials and propulsion system design.
• Knowledge of solid propulsion system design and manufacturing methods.
• Experience with strategic booster motors, tactical rocket motors, or controllable solids systems.
• Experience with CAD tools (CREO), PLM systems (Windchill), engineering drawings, and GD&T per ASME Y14.5.
• Proficiency in Microsoft Office tools (Word, Excel, PowerPoint). #LI-SP1 L3Harris Technologies is proud to be an Equal Opportunity Employer. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. L3Harris maintains a drug-free workplace and performs pre-employment substance abuse testing and background checks, where permitted by law. Please be aware many of our positions require the ability to obtain a security clearance. Security clearances may only be granted to U.S. citizens. In addition, applicants who accept a conditional offer of employment may be subject to government security investigation(s) and must meet eligibility requirements for access to classified information. By submitting your resume for this position, you understand and agree that L3Harris Technologies may share your resume, as well as any other related personal information or documentation you provide, with its subsidiaries and affiliated companies for the purpose of considering you for other available positions. L3Harris Technologies is an E-Verify Employer. Please click here for the E-Verify Poster in English or Spanish . For information regarding your Right To Work, please click here for English or Spanish .