Prototype to Production Manufacturing support for startups and product teams.
Production-readiness conversations with
Danny Park and Tom Fitzgerald
Schedule a call
One manufacturing path after the prototype

Turn your prototype into reliable production.

Sesung coordinates PCB assembly, precision parts, tooling, molding, test, sourcing, and NPI—helping your team validate a pilot and build toward repeat production with one manufacturing partner.

20 minutes • No polished RFQ required • Start with the prototype, BOM, or toughest manufacturing question
Design to manufacturingDFM, BOM, process, and test-plan feasibility
Pilot without dead endsPrototype, validation, first article, and production readiness
Build a scale pathSourcing, tooling, quality controls, and repeat production
Sesung electronics manufacturing line
Manufacturing after the prototypeClose DFM, sourcing, tooling, test, and repeatability gaps before they become expensive production problems.
Operating since 1999Established manufacturing and engineering organization
One NPI-to-production pathElectronics, machining, molding, R&D, test, and sourcing
Flexible starting pointPrototype review, pilot build, difficult subsystem, or scale-up plan
Korea + U.S. supportTechnical manufacturing with local commercial communication
What product teams need

A clear path through the gap between “it works” and “we can build it reliably.”

A prototype proves the idea, but it does not settle component availability, process capability, tooling strategy, test coverage, quality controls, or repeatability. Sesung helps product teams make those decisions as one coordinated manufacturing program.

FOUNDERS / PRODUCT LEADSENGINEERING / NPIOPERATIONSSOURCING / QUALITY
01

Prepare for manufacturing

Identify the gaps between a functioning prototype and a controlled, repeatable production process.

  • DFM and process-feasibility review
  • BOM and sourcing-risk review
  • Test, validation, and quality-plan inputs
02

Build and validate

Move through prototype, pilot, and first-article work with a manufacturing path that can support the next stage.

  • SMT, THT, assembly, and soldering
  • AOI, ICT, functional test, and traceability
  • Prototype and pilot-build support
03

Integrate the hardware

Coordinate precision parts, enclosures, finishes, tooling, and molded components with the electronics build.

  • CNC and MCT machining
  • Post-treatment and dimensional inspection
  • Q-Program mold and injection options
04

Plan repeat production

Build the sourcing, quality, tooling, and fulfillment plan needed to move beyond one-off builds.

  • Supplier management and purchasing
  • High-mix through scaled production
  • VMI and coordinated fulfillment support
Not sure what must change before a production quote?Bring the current package. We will identify the highest-risk manufacturing gaps and the smallest responsible next step.
Book the 20-minute review
A practical first engagement

Start with the prototype, BOM, CAD package, or production problem you have today.

The first conversation identifies the missing manufacturing decisions, tests process fit, and defines the smallest responsible next step.

Step 01

Review the current stage

Bring the prototype status, drawings, BOM, target date, expected volume, and known technical constraints.

Step 02

Close feasibility gaps

Map DFM, electronics, mechanical, tooling, test, sourcing, and quality decisions to the right process path.

Step 03

Pilot and validate

Align quotation assumptions, sample or first-article expectations, acceptance criteria, and the validation plan.

Step 04

Move into repeat production

Use a controlled pilot and quality sign-off before committing capital and moving into repeat or higher-volume builds.

Prepare your manufacturing review

Use the right level of detail for each decision maker.

Start with the company profile for the integrated-manufacturing story. Use the detailed catalog when engineering, investors, operations, sourcing, or quality advisors need equipment, process, product, and certification detail.

Factory and engineering overview

See how the integrated model works.

Use the video for fast visual context, then open the sales PDFs for the process, equipment, certification, and program detail needed by your review team.

2026 company profile | 19 pages

Executive capability overview

Company history, integrated service model, Premium EMS process, machining, mold and injection, NPI, certifications, industries, and partners.

Open the 2026 company profile
Manufacturing catalog | 24 pages

Detailed technical reference

Manufacturing maps, SMT and test equipment, precision-machining and molding assets, products, R&D organization, certifications, and customer examples.

Open the detailed manufacturing catalog

Compliance is confirmed against the exact program.

Sesung materials document ISO 9001 and ISO 14001 systems, IPC membership and certifications, KOLAS accreditation, and IEC 80079-related credentials. Medical, defense, export-control, customer-specific, and other program requirements should be verified during qualification before any commitment is made.

Robotics & connected products Industrial devices & automation Sensing, gas detection & safety Semiconductor equipment Medical-related components Consumer & beauty devices Complex electromechanical products
Make the next step specific

Bring your prototype, BOM, target launch date, and expected volume.

In a 20-minute production-readiness conversation, Danny Park and Tom Fitzgerald will identify the manufacturing gaps, determine whether Sesung fits the program, and recommend the smallest responsible next step.

Book the 20-minute review