Geosan Co., Ltd. is a specialized manufacturer of defense industry component materials and special vehicle component materials located in Haman-gun, Gyeongsangnam-do. Led by CEO Ko Dae-woong, it produces large engine and transmission housing-related parts for tracked vehicles. Currently, 54 employees are working.

"Geosan Co., Ltd. is committed to continuous investment and R&D to become a pivotal company in the national defense industry. We are striving for management innovation and technological development to become a leader in the industry through high-quality manufacturing."

Business Areas

• Defense Industry Component Materials: We produce large engine and transmission housing-related parts for tracked vehicles, contributing to the national defense industry.
• Special Vehicle Component Materials: We localize and produce center housings for K9 self-propelled howitzer transmissions and engine cooling housings. This plays a crucial role in supplying core components for special purpose vehicles.
• Precision Casting Technology: We utilize aluminum and magnesium casting methods to produce precision cast parts, such as guided weapon missile fuel system components. We manufacture parts requiring highly challenging technology, including a base material thickness of 3mm and meeting 2kg/㎠ pressure.

Products

• Large Engine and Transmission Housings for Tracked Vehicles: Key products include center housings for K9 self-propelled howitzer transmissions and engine cooling housings. These parts require high strength and durability to withstand temperatures above 150℃ and 6000RPM turbo impeller operation.
• Missile Fuel System Cast Parts: We produce cast parts for guided weapon missile fuel systems using the aluminum sand casting method. These are essential components for core guided weapon systems in the defense sector.

Special Notes

• Excellent Technology and Localization Achievements: We possess excellent technology, including the localization of center housings for K9 self-propelled howitzer transmissions and bases and supports for RAM, which were previously imported from the United States. Through this, we received new product certification and a gold prize at the Production Base Technology Competition.
• High-Quality Precision Casting and Machining: We boast highly challenging casting technology, including thin-walled molded products with a thickness of 7mm or less, high-temperature strength above 150℃, and distortion-free durability for 6000RPM turbo impeller operation. Products undergo thorough quality inspections such as non-destructive testing (R/T) and heat treatment tensile tests.
• Systematic Production and Quality Management: We produce high-quality products through thorough management across all processes, from raw material receipt, blending, molding, melting, component inspection, pouring, shakeout, cutting, finishing, non-destructive testing, heat treatment tensile testing, precision finishing, shot blasting, and dimensional inspection.

💡 A Word from JobPloy
The defense industry and special vehicle parts manufacturing sector is an industry where precise technical skills and quality control are crucial. Production, technical, and quality control roles are expected to be prevalent, requiring adherence to safety regulations and meticulousness. Foreign workers are encouraged to focus on improving their understanding and proficiency in production processes and quality standards.