Samjin E&I, established in 1991 as Samjin Precision, is a specialized company that has led the water industry and valve manufacturing sector in South Korea. Starting with the production of water and sewage valves and industrial valves, it has expanded its business scope to include system engineering, smart water management, and water treatment environmental facilities. Based on its excellent technical capabilities, the company continues to achieve sustainable growth by contributing to domestic infrastructure, supplying valves for space launch vehicles, and pioneering overseas markets.

"Since our establishment in 1991, we have been responsible for a pillar of South Korea's water industry based on precision and reliability in the water and sewage valve sector. Now, Samjin Precision has been reborn under the new name 'SAMJIN E&I', moving beyond a simple valve manufacturing company to become a comprehensive environmental solution company centered on system integration engineering, water treatment, and renewable energy."

Business Areas

• Water, sewage, and industrial valve business: We design and manufacture high-performance precision control valves used in domestic water and sewage infrastructure and industrial plant sites such as petrochemical, gas, and oil. Based on precision fluid control technology, our production scope extends to ultra-precision valves for special industries such as aerospace.
• Water purification, sewage treatment, and environmental plant business: We conduct engineering business for wastewater and water purification facilities, including public and industrial water treatment facilities, environmental pollution prevention facilities, and flotation separation devices. We supply eco-friendly water treatment solutions for the modernization of water supply and environmental conservation.
• Smart water management and climate tech solutions: We develop ICT-based pipeline control systems and smart water resource management platforms to realize the efficiency of water infrastructure. We are focusing on the commercialization of water infrastructure climate tech to save energy and respond to climate change.

Products

• Water and sewage valves (sluice valves, butterfly valves, check valves, etc.): These are high-durability core valve lineups responsible for flow control, backflow prevention, and pipeline protection in urban water and sewage networks and water purification facilities. Due to their excellent corrosion resistance and sealing properties, they are widely adopted and used throughout national infrastructure water and sewage facilities.
• Industrial and special-purpose control valves: These are high-temperature and high-pressure valves suitable for petrochemical plants and gas transport pipelines, as well as ultra-precision fluid control valves mounted on Korean space launch vehicles. They are manufactured according to strict quality standards to operate reliably even in harsh, extreme environments.
• Water treatment facilities and flotation separation devices: These are comprehensive environmental water treatment plant equipment applied to sewage purification, pollutant separation, and reuse processes. It is an environmental purification system that meets discharge water quality standards for sewage treatment plants and industrial sites and helps with resource circulation.

Special Notes

• No. 1 domestic valve technology and extensive intellectual property: We have localized core valve technologies that were previously dependent on imports and have secured over 300 patents and technical certifications. We possess verified ultra-precision engineering capabilities, having been selected as a supplier of fuel line valves for the Naro and Nuri space launch vehicles.
• Competitiveness in public procurement and global markets: We maintain a high market share in the water and sewage procurement market for local governments and public institutions, and continue to export water and sewage facility plants overseas. Based on our technological innovation and export achievements, we have established external credibility, including receiving a Presidential Commendation in the government's innovative product export category.
• Transition to ESG-based comprehensive environmental engineering: We have moved beyond simple mechanical processing to improve our business structure with smart water management that integrates AI and ICT technologies, as well as eco-friendly water treatment facilities. We have obtained an ESG excellence SME certificate and are practicing transparent and systematic quality and safety management.

Recruitment Information

• Main Hiring Positions: R&D, mechanical design and mechanism development, production management and process technology, quality control (QC/QA), domestic and international technical sales
• Benefits: 4 major social insurance, severance pay, regular health checkups, support for family events and paid leave for family events, provision of break rooms and convenience facilities, support for in-house training and job competency enhancement programs

💡 A Word from JOBPLOY
Samjin E&I is a long-standing manufacturing company with core competencies in precision mechanical engineering, such as precision valve manufacturing and water treatment facility assembly. Throughout the manufacturing process, including heavy object processing, assembly, welding, and quality inspection, adherence to safety regulations and proficiency in machine operation are important. Candidates with the ability to understand blueprints and basic Korean communication skills can adapt much more smoothly to the production and process management field.