Sr Principal MES Engineer

Location: Nonsan-si, Korea

Time Type: Full time

Job Description

Responsibilities

1. Business Analysis & Requirements Translation

• Gather requirements from manufacturing stakeholders (operations, process engineering, quality, supply chain)
• Translate business/user requirements into functional specifications and technical designs
• Develop and maintain:
  • Business Requirement Documents (BRD)
  • Functional Requirement Specifications (FRS)
  • User stories, use cases, and process flows
• Perform AS-IS / TO-BE gap analysis and solution definition
• Facilitate stakeholder workshops and drive alignment across business and IT
• Define acceptance criteria and lead/support User Acceptance Testing (UAT)

2. MES Functional Design

• Translate requirements into MES functional configurations:
  • Workflows, routing, and WIP tracking
  • Genealogy and full traceability models
  • Data collection plans and validation rules
• Define functional logic and system behavior prior to implementation
• Ensure scalability and maintainability of MES solutions

3. MES Implementation & Configuration

• Deploy and configure MES platforms
• Customize workflows, data collection, and production execution logic
• Lead/support:
  • Functional Testing, Integration Testing
  • User Acceptance Testing (UAT)
  • Deployment and change management
• Ensure full traceability from requirements → implementation → validation

4. System Integration & Architecture

• Design and map end-to-end business processes across systems:
  • MES ↔ ERP, PLM, SPC, SCADA, equipment/automation systems
• Define data models, data flows, and interface specifications
• Ensure alignment with enterprise architecture and integration standards
• Support MES API utilization for automation and external system integration

5. Process & Manufacturing Optimization

• Analyze manufacturing workflows to improve:
  • Quality, yield, throughput, and traceability
• Challenge existing processes and drive continuous improvement
• Implement Industry 4.0 / Digital Manufacturing strategies
• Collaborate cross-functionally to standardize MES best practices

6. Data & Analytics

• Develop and support:
  • Production dashboards and reports
  • KPIs (OEE, cycle time, downtime, yield)
• Enable data-driven decision-making on the shop floor
• Support users in extracting and analyzing data from SQL-based systems

7. Support, Operations & Troubleshooting

• Provide L2/L3 MES support in high-availability production environments
• Diagnose and resolve system and transaction issues
• Conduct root cause analysis and implement corrective actions
• Provide helpdesk support for production issues and MES-related incidents
• Deliver user training and ongoing system support

8. MES Administration & Master Data Management

• Manage MES master data: Products, materials, equipment, locations
• Administer user access, roles, and security policies
• Ensure data integrity and governance within MES
• Maintain system configurations and operational stability

9. Automation, Scripting & Technical Support

• Develop scripts, SQL queries, and lightweight programs for
  • Data extraction and reporting
  • Data integration between systems
• Support equipment/automation teams in MES integration (API usage, data exchange)
• Work with engineering teams on: Setup Parameter Data Collection and interface data collection to SPC and define the control limit & actions.

10. Compliance & Traceability

• Ensure MES solutions meet regulatory and industry standards:
  • ISO, semiconductor traceability, audit requirements
• Maintain end-to-end product genealogy and audit readiness

Qualifications:

• Bachelor’s degree (minimum) in Computer Science, Engineering, or related technical field
• Strong written and verbal communication skills in English
• Typically 6–10+ years of experience in MES implementation and support within manufacturing environments
• Proven experience supporting high-volume, high-availability production operations
• Experience across industries such as semiconductor, battery, automotive, or electronics manufacturing
• Strong Subject Matter Expert (SME) across MES and manufacturing processes and system integration
• Key bridge between business, operations, and technical teams
• Drive standardization, scalability, and long-term MES strategy
• Strong business analysis skills and ability to translate requirements into functional and technical solutions
• Proven strong problem-solving skills & critical thinking.
• Proven experience in MES configuration, troubleshooting, and production support
• Fluent in SQL; experience with C#, Python, and REST API integrations
• Excellent Communication and across-functional collaboration skills.