About Me

Over 20 years
building things
that work.

I'm an Electrical Automation Engineer who has spent the better part of two decades working inside some of the world's leading food sorting and packaging companies — SIG Combibloc and Key Technology (Duravant).

My core strength is making complex automation systems work reliably in the field, and making sure the people who operate them actually understand what they're doing.

20+

Years Experience

3

PLC Platforms

100+

Trainees Taught

Rex Yan at work
Rex Yan training
Rex Yan on site
Career Journey

Work History

Sep 2023 – Sep 2025

Field Service Engineer

Key Technology (Duravant China)

Commissioning and technical support for optical sorting systems across food processing facilities in China. Focus on software, controls, and optical calibration.

Aug 2021 – Oct 2023

Project & Electrical R&D Engineer

Suzhou Reyanmatic Co., Ltd.

End-to-end ownership of electrical automation projects — hardware design, PLC/HMI development, project management, and commissioning.

Jun 2016 – Jun 2021

Technical Training Manager

SIG Combibloc (Suzhou) Co., Ltd.

Led the technical training centre across Asia-Pacific. Managed trainers, developed curriculum, and won the company's 2020 innovation award.

Jul 2012 – Jun 2016

Electrical Trainer

SIG Combibloc (Suzhou) Co., Ltd.

Delivered PLC, HMI, and servo system training at company centres and customer sites. Built troubleshooting simulation rigs from scratch.

Dec 2009 – Jul 2012

Filler Assembly Engineer (Electrical)

SIG Combibloc (Suzhou) Co., Ltd.

Assembled and commissioned filling machines to SIG quality standards. Designed electrical diagrams.

Mar 2004 – Nov 2009

Maintenance Technician (Electrical)

Gold Hua Sheng Paper Co., Ltd.

Maintained automated production equipment using Siemens Step 7, Allen-Bradley RSLogix, and EPLAN.

Beyond Engineering

Self-Directed Development

Expanding beyond traditional engineering

Home Lab & Infrastructure

  • Proxmox 8 hypervisor with multiple Debian 12 VMs
  • Docker / Portainer containerised services
  • Self-hosted RustDesk on VPS for remote access
  • WireGuard & ZeroTier secure networking

AI-Assisted Development

  • OpenWRT Luci plugin development
  • Language-learning application
  • Exploring Siemens TIA Portal Openness API (C#)
  • AI coding workflows with VS Code