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# Technical Support Engineer

- **Company:** CESNA, INC.
- **Location:** Cupertino, CA, United States
- **Experience:** Expert
- **Salary:** $100,000.0 - $200,000.0
- **Contract:** Permanent contract
- **Skills:** Microsoft Word, Microsoft Excel, Microsoft Office, Microsoft PowerPoint, Yield Optimization
- **Published:** October 29, 2026
- **Apply:** http://seanellen.com/SearchJobs/Descriptions?p0=16422

## About the Role

* - Bachelor's degree or higher in Engineering, Materials Science, Chemistry, or a related field.
 * - Bilingual in both English and Korean
 * - - 10+ years in package substrate development, process or customer engineering, or technical marketing.
 * - Proven record of leading substrate projects through mass production.
 * - Experience supporting major semiconductor customers preferred.
 * - Deep knowledge of substrate processes, materials, structures, and design rules.
 * - Hands-on experience with ABF, ETS, Hybrid Stack-up, Cavity, Fine Pattern, and RF.
 * - Ability to translate customer requirements into technical solutions.
 * - Experience in NPI, yield improvement, and production transfer.
 * - Strong customer relationship management skills.
 * - Clear technical presentation and communication skills.
 * - Project management and problem-solving capability.
 * - MS Office (PowerPoint, Excel, Word).
 * - Six Sigma Green Belt or equivalent preferred.
 * - PMP or equivalent project management certification preferred.
 * Travel:
 * - On-site customer support with frequent customer engagement.
 * - Frequent travel to customer sites within the U.S.
 * - Periodic travel to Korea for engineering and business reviews.

## Description

Serve as the on-site technical lead for advanced package substrate programs with Apple in the U.S., driving issue resolution and alignment with our teams in Korea to deliver successful mass production launches., * - Provide technical support for customer development programs (Mobile AiP, SiP, FC-CSP, RF).

 * - Resolve technical issues and drive performance stabilization at the customer.
 * - Identify and develop PoC opportunities through customer engagement.
 * - Guide BOM and substrate structure selection using LGIT technical solutions.
 * - Lead design reviews, TRA assessments, yield improvement, and production readiness.
 * - Coordinate between customer engineering and LGIT R&D, Process, Quality, and Manufacturing.
 * 2) Others
 * - Conduct regular customer meetings and technical presentations.
 * - Collect customer VOC and market intelligence to shape technology roadmaps.
 * - Support technology promotions, exhibitions, and strategic customer engagements.
 * - Promote advanced substrate technologies (Hybrid Stack-up, Fine Pattern, Cavity, Hyper Flex).