U.S. BUILT · VETERAN OWNED · SERVING INTERNATIONALLY
3S INTERNATIONAL
A World of Opportunities
Custom metal fabrication, generator enclosures, power system packaging, and AI data center infrastructure — built to spec, delivered at scale.
Get in TouchISO 9001:2015 Certified · ANAB Accredited · Veteran Owned & Operated · 100+ Employees & Contractors · Global Manufacturing
U.S.-Based. Built for Scale.
3S International is a U.S.-based manufacturer headquartered in Laurens, South Carolina, specializing in high-volume custom metal fabrication for demanding industrial applications. Founded in Hong Kong in 2000 and operating in South Carolina since 2015, 3S leverages advanced equipment — including CNC laser cutting, fiber laser cutting, robotic welding, automated punching, and precision press braking — to deliver consistent, high-quality components at scale. With facilities in the U.S. and a 100,000+ sq. ft. overseas manufacturing facility in the Philippines, 3S serves generator OEMs, EPC contractors, and hyperscale data center developers worldwide.
What We Do
3SI CAPABILITIES
Design & Engineering
SolidWorks CAD, data center heat exchangers, custom solutions
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Fabrication
CNC laser, fiber laser, plasma cutting, robotic welding, press braking
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Generator Enclosures
Drop-over enclosures, sound-attenuated packages, seismic-rated housings up to 3 MW
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AI Data Center Solutions
Standby generator infrastructure, cooling systems, containerized power modules for hyperscale AI
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Power System Packaging
Integrated power modules, switchgear enclosures, battery storage modules
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Fuel Tanks
Above-ground tanks, sub-base tanks, UL-142 systems, day tanks and controls
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Global Manufacturing
U.S. + Philippines + Asia supply chain — 1,000+ units annual capacity
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Veteran-owned, ISO 9001:2015 certified, founded 2000, SC operations since 2015
Learn More100+
Employees & Contractors
1,000+
Units Annual Capacity
3 MW
Max Generator Package
100K+
Sq. Ft. Philippines Facility
Products
THE 3SI POWER SOLUTIONS PRODUCTS
ECAT System
ECAT system deployment for Rolls Royce Power Systems — containerized power modules engineered for large-scale generator and data center applications.
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Fuel Tanks
High-volume custom fuel storage tanks built to industrial specification — above-ground, sub-base, UL-142 systems, day tanks, and fuel transfer systems.
Learn MoreISO 9001:2015 Certified
MCNA of North America has qualified 3SI Quality Management System of: 3S International, Inc. — 1073 Neely Ferry Road, Laurens, SC 29360 USA — has been assessed and found complying with the requirements of ISO 9001:2015. Certification Scope: The Design, Manufacture and Finish of Metal Weldments and Assemblies. Certificate Number: 1708009. Issue Date: 6-Mar-2018. ANAB Accredited · IAF Recognition.
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3SI POWER SOLUTIONS GROUP
- 1073 Neely Ferry Road, Laurens, South Carolina 29360, United States
- 1-941-780-9503
- Mon–Fri 09:00 am – 05:00 pm, Sat–Sun Closed