Mechanical Engineer - Opto Sigma - Costa Mesa, CA

Location: On-site

Employment Type: Full-Time

Reports To: Engineering Manager

About The Role: We're looking for a Mechanical Engineer to support the design and development of precision mechanical and opto-mechanical assemblies, mounts, and positioning systems. This role spans the full product lifecycle — from concept and design through prototyping, testing, and production support — working closely with optical, systems, and manufacturing engineers. We're looking for someone energetic and eager to jump into a wide variety of projects, bringing enthusiasm to solving new problems as they come up.

What You'll Do: Create and maintain detailed drawings, tolerances, and BOMs for manufacturing. Provide customer support for mechanical components and assemblies. Design mechanical components and assemblies (housings, mounts, positioning stages, mechanisms) using 3D CAD.Build and test prototypes; support design verification and validation activities. Work with manufacturing and quality teams to resolve design and build issues. Support new product introduction from concept through production release. Maintain engineering documentation and support engineering change processes. Own and process ECOs (Engineering Change Orders), and support quotation activities for custom products. Support the Quality Assurance department regarding inspection and final test requirements as needed.

What We're Looking For: Bachelor's degree in mechanical engineering or related field.0-5 years of relevant design experience — new graduates with strong fundamentals are encouraged to apply. Proficiency with 3D CAD software (Solid Works or similar).Solid understanding of Geometric Dimensioning & Tolerancing, tolerance stack-up, and mechanical design principles. Opto Sigma Corporation 1540 Scenic Avenue, Suite 150 Costa Mesa, CA 92626 USA+1 949-851-5881www.optosigma.comsales@optosigma.com Familiarity with common machining, fabrication, and assembly processes (experience utilizing CNC)Strong problem-solving skills and attention to detail. Ability to work cross-functionally with optical, electrical, and manufacturing teams.

Nice to Have: (Not Required)Experience designing and/or aligning precision or opto-mechanical assemblies. Exposure to Finite Element Analysis, ZeMax/Code V, or other simulation tools. Experience with prototyping and hands-on build/test.

Benefits: We offer a competitive, comprehensive benefits package built to support your health, financial security, and longterm growth. Health, dental, and vision coverage Retirement savings plan Paid time off and holidays Life and disability insurance Opportunities for professional growth and development