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Thammasorn Group Co., Ltd. Tech Stack

Water treatment and waste management services across Thailand and ASEAN

Environmental Services Bangkok , Bangkok 1,001–5,000 employees Founded 1991 Self-Owned

Thammasorn Group operates a diversified environmental-services portfolio spanning water tanks, septic systems, solid waste treatment, biogas engineering, and building hardware across Thailand and ASEAN. The tech stack is legacy-heavy (Visual Basic 6, VB.NET, SQL Server, AutoCAD, Flash) with no modern cloud or DevOps tooling visible, and hiring remains minimal and concentrated in engineering and sales — a pattern typical of established manufacturing and infrastructure operators prioritizing operational efficiency over platform scaling.

Tech Stack 14 technologies

Core StackAutoCAD Adobe Illustrator SQL Server Microsoft Office Visual Basic 6 VB.NET SQL jQuery Mobile macOS Excel Photoshop Flash Dreamweaver Meta

What Thammasorn Group Co., Ltd. Is Building

◆Challenges

Internal audit evaluation
Preventive maintenance scheduling
Aligning iso documents with operations
Closing car/par
Customer complaint resolution
Maintaining iso compliance
Document control
Meeting production targets
Improving production line efficiency
Analyzing production capacity

▲Active Projects

Windows app development
Update iso documentation
Conduct monthly quality objective meetings
Train iso knowledge
Car/par tracking
Internal audit evaluation
Waste disposal system design
Sales of treatment tanks and water storage tanks via village development projects
Klsa ready-made door/window product marketing via home pro channel
Sewage treatment tank specs

Hiring Activity

Minimal50 roles · 1 in 30d

Department

Engineering

14

Sales

12

Ops

9

Finance

4

Marketing

4

HR

2

Logistics

2

Manufacturing

2

Seniority

Junior

21

Mid

21

Manager

5

Senior

3

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About Thammasorn Group Co., Ltd.

Thammasorn Group is a self-owned environmental-services company founded in 1991, headquartered in Bangkok. The organization operates through four divisions: DOS Life manufactures and distributes septic and water storage tanks (400,000+ units annually across 1,000+ distribution channels); DOS Greenovation provides clean energy and solid waste treatment equipment including incinerators and sorting systems; DOS Corporation designs and builds biogas systems at scale; and Lynn produces sliding doors and windows for residential and commercial use. The company serves both government and private-sector customers across Thailand and broader ASEAN markets.

HeadquartersBangkok , Bangkok

Company Size1,001–5,000 employees

Founded1991

Hiring MarketsThailand

Frequently Asked Questions

What is Thammasorn Group's core business?

Thammasorn Group provides water treatment, wastewater, solid waste management, energy, and transportation services under a 'Total Environmental Management' model for government and private sectors across Thailand and ASEAN.

How many employees does Thammasorn Group have?

The company operates in the 1,001–5,000 employee range, with current active roles concentrated in engineering (14), sales (12), and operations (9).

What technology does Thammasorn Group use?

The stack includes Visual Basic 6, VB.NET, SQL Server, AutoCAD, Microsoft Office, Excel, and jQuery Mobile — primarily legacy enterprise and design tools with no modern cloud infrastructure visible in active use.