MINSUNG Co., Ltd. · Ulsan, Korea · Since 2007
Electrical and instrumentation for process plants — built safely, start to finish.
We are an E&I contractor based in Ulsan, home to Korea’s Ulsan and Onsan petrochemical complexes. Since 2007 we have installed electrical and instrumentation systems for refineries, petrochemical plants, power plants and LNG terminals — over 830 contracts between 2008 and 2026.
Download our company brochure PDF · 53 pages · 3.7MB
What we do
From electrical to instrumentation, one contractor.
7 construction licences under one company let us take a plant’s whole electrical, instrumentation, fire, telecom and foundation scope — no need to bring in several subcontractors.
Electrical
Substations and power distribution, motors and lighting; cable trays, cable pulling and termination; commissioning and maintenance.
Licence: Electrical construction
Instrumentation
Instrument installation, impulse tubing, calibration, loop checks and DCS panels.
Licence: Electrical construction
Fire protection
Fire detection and alarm systems, and fire extinguishing systems.
Licence: Fire protection construction
Telecommunications
Communication networks and CCTV.
Licence: Telecommunications construction
Renewable energy
Solar power installations.
Registered solar installation company
Mechanical & scaffolding
Mechanical and gas systems; structure demolition and scaffolding.
Licence: Mechanical & gas
Civil works
Equipment foundations, reinforced concrete structures and ground preparation.
Licence: Reinforced concrete
Industries we have worked in · number of contracts
- Petrochemicals 238
- Refining 181
- LNG & gas 114
- Semiconductors & batteries 62
- Power generation 60
- Food 17
- Data centres 8
Safety
Our clients recognise us for safety.
13 of the 18 awards we have received from clients were given for safety — by the refineries, gas terminals and EPC contractors we work for.
| Year | Client | Recognition |
|---|---|---|
| 2025 | LS L&F Battery Solution | Plaque of appreciation — new Saemangeum plant completed with zero accidents |
| 2025 | SK ecoengineering · Ulsan SKMU Project | Plaque of appreciation — health and safety put first on E&I and telecom works |
| 2025 | SK ecoengineering · Ulsan SKMU Project | Excellent contractor in the project’s health & safety evaluation |
| 2024 | S-OIL · Onsan Refinery | Site safety management — Excellent contractor, 2024 |
| 2024 | SK Gas · Ulsan Terminal | Excellent partner — strict compliance with safety rules on terminal works |
| 2024 | SK Gas · Ulsan Terminal | Plaque of merit — zero accidents and safety culture at the G-Hub site |
| 2023 | S-OIL · Onsan Refinery | Site safety management — Excellent contractor, 2023 |
| 2021 | Ulsan PP | Plaque of appreciation — safety, quality and schedule on the Spheripol PP plant, completed early |
| 2020 | S-OIL · Onsan Refinery | Site safety management — Best contractor, 2020 |
| 2015 | SK Energy · Ulsan CLX | Commendation — quality and safety on a compressor driver replacement during turnaround |
| 2013 | SK E&C · New PX OBL Project | Commendation — site safety culture; zero-accident target reached twice over |
| 2013 | SK E&C · New PX OBL Project | Commendation — safety by every worker; zero-accident target reached |
| 2011 | Samsung Everland | Excellent partner — quality and safety management |
2021 — Our CEO received a commendation from the Minister of Employment and Labor for building an electrical safety culture at work sites (24th Electrical Culture Awards).
Certifications
ISO 9001
Quality management system
GMS Certification Services · valid until 2027.11.17
ISO 14001
Environmental management system
GMS Certification Services · valid until 2027.09.01
ISO 45001
Occupational health & safety management system
GMS Certification Services · valid until 2027.09.10
KOSHA-MS
Occupational safety & health management system
Korea Occupational Safety and Health Agency (KOSHA) · valid until 2028.05.30
Scope: S-OIL Onsan Refinery site only
ISO certificates cover the construction and maintenance of electrical, instrumentation, fire protection and telecommunications works.
ESG ratings
S
SK Gas ESG management level assessment
2025 performance · certificate valid until 2027.04.15
ESG-2
e-Credible ESG rating
2026 · top 7.1%
Figures
How big we are, with sources.
Every figure carries its year and source.
No. 3in Ulsan
Electrical construction capacity ranking
FY2026 · among electrical contractors based in Ulsan [1]
KRW151.7bn
Electrical construction capacity rating
FY2026 [1]
No. 64in Korea
National capacity ranking
FY2025 · of 20,788 electrical contractors (top 0.3%) [2]
KRW110.8bn
Revenue
FY2025 · audited [3]
- [1] Ulsan Maeil and Ulsan Shinmun, 2 Aug 2026 (FY2026 capacity ratings)
- [2] Korea Electrical Contractors Association, capacity rating certificate, 31 Jul 2025
- [3] Audit report for the 19th fiscal year (DART); e-Credible company report
Selected projects
Recent work, by name.
A few of the plants we have worked on in recent years, with contract values.
S-OIL Shaheen Project — interconnection electrical & instrumentation works
KRW 30.9 bn
DL E&C · 2024.12–2026.04 · Refining
S-OIL Gas Turbine Generator Project — electrical & instrumentation
KRW 9.7 bn
DL E&C · 2025.04–2027.04 · RefiningOngoing
Ulsan GPS combined-cycle power plant — electrical works
KRW 30.9 bn
SK ecoengineering · 2022.04–2025.11 · Power generation
Ulsan SKMU Project — electrical & instrumentation
KRW 24.8 bn
SK ecoengineering · 2023.05–2025.11 · Power generation
Ulsan North Port LNG terminal, Phase 3 — electrical & instrumentation
KRW 9.8 bn
Daewoo E&C · 2023.01–2026.04 · LNG & gas
Taekwang Industrial A-2 Project — electrical & instrumentation installation
KRW 11.8 bn
Taekwang Industrial · 2024.12–2025.12 · Petrochemicals
Gasan data centre — electrical works
KRW 24.5 bn
KT Cloud · 2022.01–2025.12 · Data centres
Saemangeum precursor plant — electrical & instrumentation
KRW 16.7 bn
Eco&Dream · 2024.03–2025.06 · Semiconductors & batteries
Offices
Head office in Ulsan, subsidiaries in Southeast Asia.
Head office · Ulsan
25-4, Sangnam 2-gil, Cheongnyang-eup, Ulju-gun, Ulsan, Korea
+82-52-266-6417 · Fax +82-52-266-6419
Seoul office
Suite 702, Sinmunno Building, 12 Saemunan-ro 3-gil, Jongno-gu, Seoul
Overseas subsidiaries
Vietnam · Ho Chi Minh City
MIN SUNG VINA CO., LTD.
Since 2018 · ISO 9001 · 14001
Indonesia · Jakarta
PT MINSUNG ENGINEERING CONSTRUCTION
Since 2020 · ISO 9001 · 14001 · 45001
Thailand · Rayong
MIN SUNG THAI CO., LTD.
Since 2022 · ISO 9001
Malaysia · Kuala Lumpur
MIN SUNG (M) SDN. BHD.
Since 2026
Contact
Tell us about your plant.
Write to us with the site, the scope and the schedule, or call our head office in Ulsan.
Also: [email protected] · CEO Kwon Taek-Jang
+82-52-266-6417Company brochureMINSUNG Co., Ltd. · CEO Kwon Taek-Jang · Business registration no. 610-81-89801