Our Clients

Trusted by leading energy, petrochemical, and industrial companies across Southeast Asia and beyond.

JST Group has built lasting relationships with major operators, engineering firms, and international companies operating in the region. Our clients trust us for our technical expertise, reliability, and commitment to delivering results.

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Showing 68 of 68 clients
PTT Public Company Limited
Oil & Gas
Thailand
PTTEP
Oil & Gas
Thailand
EGAT
Power
Thailand
Glow Energy
Power
Thailand
SCG (Siam Cement Group)
Industrial
Thailand
Chevron Thailand
Oil & Gas
Thailand
Shell Thailand
Oil & Gas
Thailand
Total E&P
Oil & Gas
Thailand
IRPC
Petrochemical
Thailand
Thai Oil
Refining
Thailand
Bangkok Gas
Gas Distribution
Thailand
RATCH Group
Power
Thailand
EGCO Group
Power
Thailand
GC (Global Chemical)
Petrochemical
Thailand
AGC Chemicals
Chemical
Thailand
BST Elastomers
Petrochemical
Thailand
Esso (Thailand)
Oil & Gas
Thailand
CTCI (Thailand)
Engineering & Construction
Thailand
Petrofac
Engineering & Construction
Thailand
Siamrajathanee
Industrial
Thailand
SCG Chemicals
Petrochemical
Thailand
GPSC
Power
Thailand
Samsung Engineering
Engineering & Construction
Thailand
CPP (Carigali Pattani)
Oil & Gas
Thailand
TTCL
Engineering & Construction
Thailand
Technip
Engineering & Construction
Thailand
Marubeni
Trading
Thailand
Sinopec
Oil & Gas
Thailand
Penspen
Engineering & Construction
Thailand
BIG (Bangkok Industrial Gas)
Industrial
Thailand
TNS (Thai Nippon Steel)
Industrial
Thailand
Saipem
Engineering & Construction
Thailand
McConnell Dowell
Engineering & Construction
Thailand
Worley
Engineering & Construction
Thailand
Eastwater
Water & Utilities
Thailand
CUEL
Engineering & Construction
Thailand
Q8 Aviation Thailand
Aviation
Thailand
Mubadala Petroleum
Oil & Gas
Thailand
Hess Thailand
Oil & Gas
Thailand
ConocoPhillips
Oil & Gas
Thailand
Petrovietnam Biendong POC
Oil & Gas
Vietnam
Cuu Long JOC
Oil & Gas
Vietnam
Hoan Vu JOC
Oil & Gas
Vietnam
Hoang Long JOC
Oil & Gas
Vietnam
JVPC (Japan Vietnam Petroleum)
Oil & Gas
Vietnam
KNOC (Korea National Oil)
Oil & Gas
Vietnam
STD (Song Thu)
Engineering & Construction
Vietnam
Kobelco E&M
Engineering & Construction
Vietnam
Phateco
Oil & Gas
Vietnam
Premier Oil
Oil & Gas
Vietnam
PTSC M&C
Engineering & Construction
Vietnam
PV Gas
Gas Distribution
Vietnam
PTSC
Oil & Gas
Vietnam
TTA (Thoresen Thai)
Maritime
Vietnam
Inaoffshore
Oil & Gas
Vietnam
Baker Hughes
Oilfield Services
Vietnam
Sasol
Petrochemical
South Africa
Mondi
Industrial
South Africa
Stork
Engineering & Construction
South Africa
Engen
Oil & Gas
South Africa
Yokogawa
Industrial Automation
South Africa
Astron Energy
Oil & Gas
South Africa
Natref
Refining
South Africa
Eskom
Power
South Africa
AECI
Chemical
South Africa
First Quantum Minerals
Mining
South Africa
Rompco
Gas Distribution
South Africa
3C Metal
Engineering & Construction
South Africa
1000+
Satisfied Clients
Across Southeast Asia and the wider region
44+
Countries Served
Active corrosion control operations globally
40+
Years of Trust
Building long-term client partnerships since 1983

See Our Work in Action

Browse our project references to see detailed examples of the work we've delivered for these clients.

Talk to Our Team