GS Engineering & Construction (GS E&C) is laying the groundwork to enter the hydrogen production technology sector. The company reported that it signed an agreement this month with U.S.-based electrolyzer technology firm EVOLOH to develop an anion-exchange-membrane (AEM) water electrolysis plant package. The joint development program will begin at the end of November 2025.

The agreement follows an MOU signed in April 2025 covering potential collaboration in basic design packages (BDP), front-end engineering design (FEED), and engineering, procurement and construction (EPC).

EVOLOH has developed electrolyzer stack technology that produces hydrogen through water electrolysis using an AEM. Unlike proton-exchange-membrane (PEM) systems, AEM technology does not require rare-earth materials and precious metals. In this context, AEM technology is a highly promising next-generation technology for electrolyzer-based hydrogen production. EVOLOH’s patented rapid manufacturing technology leads to 4x lower factory cost and 5x lower stack materials cost compared to current technologies. Most importantly, EVOLOH’s stacks are designed to operate off grid to avoid grid connections costs and expensive electricity rates, thus drastically minimizing operating expense. EVOLOH has completed pilot testing of its megawatt-scale Nautilus® electrolyzer stack and has begun commercial production.

GS E&C plans to develop hundreds-of-megawatts-scale hydrogen production plant packages designed to integrate EVOLOH’s AEM stack technology. The hydrogen production package with EVOLOH’s AEM stack will be a key enabler that significantly reduces the levelized cost of hydrogen (LCOH).

A GS E&C representative said “By combining our EPC expertise with EVOLOH’s core technology, we see this partnership as a pivotal step in expanding our portfolio from traditional petrochemical projects to next-generation clean-energy infrastructure. We aim to lead the green business sector by building a value chain across the hydrogen market.”

In related hydrogen-sector activities, GS E&C signed an agreement in September with Korea Gas Corporation and Sumitomo Corporation Korea for collaboration on technology development for a liquid-hydrogen import terminal. Under the agreement, the partners will establish the technical basis for demonstration and infrastructure development, with GS E&C responsible for technical evaluations for developing liquid-hydrogen storage infrastructure.