Technical Support Engineer (Package Substrate) Bilingual in Korean

Cesna Recruitment · Cupertino, United States · Full-time · Posted 2026-10-29

Responsibilities

\- 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 customerengagement.
\- Guide BOM and substrate structure selection using LGIT technicalsolutions.
\- Lead design reviews, TRA assessments, yield improvement, and production readiness.
\- Coordinate between customer engineering and LGIT R&D, Process,Quality, and Manufacturing.

\- 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).

\- 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.

[Apply at Cesna Recruitment](https://apply.workable.com/cesna-group-2/j/32C6D8807E/apply)