Hi, I'm Walter.

I lead regional energy operations across Asia Pacific—and I build the digital tools that keep them running smoothly. From high-stakes logistics at Siemens Energy to custom AI and automation tools, I turn complex operational chaos into smooth, scalable workflows.

Explore my workSee what I build
Wirut (Walter) Praphaiyasathok
WIRUT (WALTER) PRAPHAIYASATHOK — Bangkok · Asia Pacific
10+years in operations
10APAC countries
200+people aligned under 1 streamlined workflow.
2Siemens Energy Passion Awards
01About & Career JourneyOperator by responsibility. Builder by instinct.

ABOUT

Operator by responsibility. Builder by instinct.

I lead site spare parts and logistics for Siemens Energy’s wind power operations across Asia Pacific, managing material and logistics activities for 298 sites in 10 countries. My background spans engineering, operational readiness, service operations excellence, and regional resource planning. I’m also a hands-on builder: I develop Power Apps inventory systems, turn SAP data into Power BI dashboards, and lead automation that helps teams spend less time on repetitive work and more time solving operational problems.

CAREER JOURNEY

From factory-floor improvement to regional operations leadership.

  1. – Present

    Head of Wind Power Asia Pacific Sites Spare Parts and Logistics

    Siemens EnergyLead site spare parts and logistics for wind power operations across Asia Pacific.
    • Manage and control material management and site logistics for 298 sites across 10 countries.
  2. –

    Head of APAC Service Resource Management and Planning

    Siemens GamesaLed service resource management and planning across the APAC region, covering materials, qualified resources, procedures and special tooling.
    • Managed a team responsible for EUR 13 million in material management and planning across 10 countries in the APAC region.
    • Ensured the timely availability of 200+ resources with the right qualifications, based on accurate forecasting and demand analysis.
    • Drove inventory optimization and implemented strict governance protocols in SAP S/4HANA.
    • Ensured awareness and availability of the correct procedures, instructions and checklists, and oversaw the procurement, calibration and use of special tooling.
    • Received the 2025 Energy Passion Award in the Simplify category (utilizing RPA).
    • Received the 2024 Energy Passion Award in the Simplify category (automation in SAP).
  3. –

    Team Lead - APAC Service Operation Excellence

    Siemens GamesaLed APAC service operation excellence through operational KPIs, performance reporting, an efficiency program and digitalization.
    • Established operational KPIs across the business to enable fact-based decision-making and the identification of best practices.
    • Initiated an efficiency program that led to significant improvements in operational performance.
    • Produced operational and commercial performance reports to identify risks and opportunities, leading teams in problem-solving and continuous improvement.
    • Led the APAC digitalization program, including digital troubleshooting, Proceedix and video optimization.
    • Received a “Thank You” award for Ownership Attitude in Q3 2022.
  4. –

    APAC Service Operation Readiness Project Manager

    Siemens GamesaManaged APAC service operation readiness projects, from technical solution roll-out and reporting to SAP support and stakeholder communication.
    • Deployed a new technical solution as Roll-out Manager, resulting in savings of EUR 1 million.
    • Established APAC Operation Power BI reporting, improving data accuracy and transparency.
    • Served as an SAP S/4HANA (AGORA) super user, providing end-to-end support for Field Service Management (FSM) technicians.
    • Led and facilitated meetings so that outputs met predefined timelines, and implemented and drove “lessons learned” programs for continuous improvement.
    • Managed stakeholders through effective communication across all phases of the project life cycle.
    • Nominated for a talent program by the Head of APAC Operations.
  5. –

    Engineer Supervisor (VP Manufacturing HQ GM’s Office)

    SIAM KUBOTASupported production engineering and continuous improvement, and trained operators and supervisors.
    • Supported production engineering and collaborated with production engineers to meet special qualification requirements from management.
    • Served as an in-house specialist, training operators and supervisors in the technical and theoretical aspects of Quality Control Circle, quality management, PLC, pneumatics, SQL, Microsoft Access and continuous improvement.
    • Improved the shop floor through ergonomics and time studies.
    • Supported the production line in applying new technologies, such as IoT and machine learning, for optimization.
    • Served on the continuous improvement committee for productivity, setting up teams for the yearly Kaizen award contest held by the Technology Promotion Association, and led the AMATA team in the KUBOTA group KARAKURI KAIZEN skill contest.
    • Supported management policy projects at M level, including creating a best-practice machine for operators to practise their skills.
  6. –

    Research Assistant

    Chiang Mai UniversitySupported a research team with research, documentation, reporting and office administration.
    • Researched selected topics.
    • Created drafts, memos, translations and emails, and prepared reports for weekly meetings.
    • Recorded, transcribed and distributed meeting minutes.
    • Summarized information from field research to keep team members updated.
    • Opened, sorted and distributed incoming messages and correspondence, and purchased and maintained office supply inventories.
    • Greeted visitors and shared research information.
  7. –

    Intern

    MakitaInternship focused on topic research and competitor machine analysis.
    • Researched significant factors related to an assigned topic.
    • Studied competitor machines to identify their advantages and disadvantages.
02SELECTED WORKComplex operations. Specific problems. Systems that worked.
01

INVENTORY REDISTRIBUTION · APAC · 2026

Turning Inventory Visibility into Cross-Country Action

I used my SAP Inventory Management experience and Power BI to help teams across 10 countries identify unused parts and match them with needs elsewhere. I analyzed the data, built the dashboard, and coordinated country agreement and transfers, helping teams reuse existing stock and reduce new purchases.

Read the case study →
02

OPERATION READINESS · SOUTH KOREA

Case Study: Writing the Manual for Uncharted Territory.

When Siemens Energy introduced a new product in Asia Pacific, no one in the region had installed or serviced it before. With ten different teams trying to navigate unfamiliar ground under tight deadlines, I stepped in to create clarity. I built a clear step-by-step roadmap, weekly troubleshooting routines, and a transparent issue tracker. The result? We went live on schedule in South Korea, and our blueprint was reused for expansions in Vietnam and Thailand.

Read the case study →

CASE STUDY 01 · 2026 · ASIA PACIFIC · 10 COUNTRIES

Turning Inventory Visibility into Cross-Country Action

Unused spare parts, data analytics, a joint decision, and delivery of parts to a wind farm

The challenge

Parts sitting unused in one country could still be needed in another. The challenge was to make these opportunities visible and help country teams agree when existing stock could meet demand instead of buying new parts.

My role

As Head of Wind Power Asia Pacific Sites Spare Parts and Logistics, I led the work from data analysis and dashboard development through to country coordination and redistribution execution.

The approach

I applied my SAP Inventory Management knowledge to interpret traceable operational data, identify dead stock, and uncover redistribution opportunities. Using data analytics and Power BI, I turned that information into a clear view of the issues and options for executives and country teams.

We planned together, aligned on the problems and their root causes, and developed solutions jointly. Information sharing continued throughout the process. When a country was uncertain about releasing parts, I involved technical support to help address its concerns and build confidence in the decision.

The outcome

Country teams completed transfers that put unused parts to use elsewhere and reduced the need for new purchases. The dashboard made opportunities visible; stakeholder coordination helped turn those opportunities into action.

CASE STUDY 02 · SOUTH KOREA · 2021

Case Study: Writing the Manual for Uncharted Territory.

South Korea new-product deployment playbook from unfamiliar challenge through governance and reusable regional knowledge

When Siemens Energy introduced a new product in Asia Pacific, no one in the region had installed or serviced it before. With ten different teams trying to navigate unfamiliar ground under tight deadlines, I stepped in to create clarity. I built a clear step-by-step roadmap, weekly troubleshooting routines, and a transparent issue tracker. The result? We went live on schedule in South Korea, and our blueprint was reused for expansions in Vietnam and Thailand.

03SYSTEMS I’VE BUILTI build the tools I wish operations already had.

From shop-floor hardware to enterprise automation, I turn recurring operational problems into working tools.

CREDENTIALS

IPMA Level C · Google AI Professional · Microsoft Certified: Power Platform Fundamentals · Google Project Management

RECOGNITION

Siemens Energy Passion Award 2025 — RPA Integrated with SAP / Siemens Energy Passion Award 2024 — MRP Automation in SAP / Ownership Attitude Award Q3 2022 — Peer nominated

04WRITINGNotes on leadership, technology, and the future of work.

AI & Work

The Middle Class in the Early AI Era

The other day, I stumbled upon a comforting yet jarring realization: I am not the only one feeling completely lost right now.

5 min read

View all writing →

HOW I WORK

Lead the operation.
Build the system.
Make the change stick.

That is how I turn regional complexity into work people can actually use.

Connect on LinkedIn →

Let’s talk about operations, logistics, and practical digital tools.

W.Home
Connect ↗

Hi, I'm Walter.

I lead regional energy operations across Asia Pacific—and I build the digital tools that keep them running smoothly. From high-stakes logistics at Siemens Energy to custom AI and automation tools, I turn complex operational chaos into smooth, scalable workflows.

Wirut (Walter) Praphaiyasathok
WIRUT (WALTER) PRAPHAIYASATHOK — Bangkok · Asia Pacific
10+years in operations
10APAC countries
200+people aligned under 1 streamlined workflow.
2Siemens Energy Passion Awards

HOW I WORK

Lead the operation.
Build the system.
Make the change stick.

That is how I turn regional complexity into work people can actually use.

Connect on LinkedIn →

Let’s talk about operations, logistics, and practical digital tools.