Sr. Mechanical Design Engineer-Siemens NX

Senior Mechanical Design Engineer – Aerospace

Location: Oxnard, CA | Onsite
Salary: $145,000 DOE
Employment Type: Direct Hire

Johnson Service Group (JSG) is seeking a Senior Mechanical Design Engineer with 5–10+ years of experience in aerospace mechanical/structural design, specializing in composite part design, laminate/ply layups, and Siemens NX.

This is a direct-hire opportunity with an established aerospace company in Oxnard, CA.

We are looking for a hands-on design engineer who can take aerospace components and structures from initial concept through detailed design, manufacturing, assembly, and integration. The ideal candidate will bring strong expertise in composite design and manufacturing, proficiency in Siemens NX, and the ability to work independently while collaborating with cross-functional engineering and manufacturing teams.
Key Responsibilities

• Design and develop aerospace mechanical and structural components and assemblies based on engineering requirements.
• Perform detailed design of composite and metallic components, considering weight, structural performance, manufacturability, and cost.
• Develop composite laminates, ply definitions, and layups while applying Design for Manufacturing (DFM) principles.
• Create and modify 3D models and engineering drawings using Siemens NX.
• Prepare and release engineering drawings in accordance with ASME Y14.5 / GD&T standards.
• Perform engineering hand calculations and basic FEA to validate design concepts and support engineering decisions.
• Select appropriate materials, fasteners, and mechanical hardware.
• Support engineering design reviews, technical documentation, and Bill of Materials (BOM) development.
• Collaborate with manufacturing and assembly teams to support fabrication, integration, testing, and resolution of build-related issues.

Required Qualifications

• Bachelor's degree in Mechanical Engineering, Aerospace Engineering, or a related engineering discipline.
• 5–10+ years of mechanical or structural design experience, preferably within the aerospace industry.
• Strong proficiency in Siemens NX, including 3D modeling and detailed engineering drawings.
• Hands-on experience with composite part design, laminate definitions, and ply/layup development.
• Understanding of composite manufacturing processes and fabrication requirements.
• Experience designing machined metallic components and mechanical assemblies.
• Working knowledge of ASME Y14.5 and GD&T.
• Ability to perform engineering hand calculations and basic structural analysis.
• Strong problem-solving, communication, and cross-functional collaboration skills.
• ITAR compliance required

Preferred Qualifications

• Advanced Siemens NX experience, including complex part and assembly modeling.
• Experience with aerospace composite structures, including bonded and mechanically fastened assemblies.
• Knowledge of composite tooling and manufacturing processes.
• Experience with primary and secondary aircraft structures.
• Exposure to landing gear and hydraulic systems is a plus.
• Experience with advanced FEA, structural verification, and build-to-test engineering support.

Compensation & Benefits

• Salary: $145,000 DOE
• Health insurance benefits.
• Retirement benefits.
• Potential performance-based bonuses.
• Employee wellness programs.

BENEFITS: 

• Exempt position.
• Two weeks of vacation per year.
• One week of sick leave per year.
• 12 paid holidays per year.
• Health, Dental, and Eye Insurance in accordance with M4 benefits. (after a one month waiting period)
• 401(k) (traditional and Roth options) allowing up to 100% salary deferral (subject to IRS limits, and after a 2-month waiting period)
• 4% company match contribution to your 401(k) with full vesting to employee
• First 2% matched 1:1
• Second 2% matched 2:1
• 6% employee contribution required for full 4% match
• Project and performance-based bonus plan

** Johnson Service Group (JSG) is an Equal Opportunity Employer. JSG provides equal employment opportunities to all applicants and employees without regard to race, color, religion, sex, age, sexual orientation, gender identity, national origin, disability, marital status, protected veteran status, or any other characteristic protected by law.
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