Osung Engineering

Osung Engineering, a South Korean sole proprietorship based in Pyeongtaek, provides HVAC and refrigeration maintenance and repair services to federal agencies as a prime contractor (82% of recent awards) operating in the Western Pacific region. The company competes under full-and-open awards with no set-aside designation; all recent contracts were awarded through open competition.

Osung's customer footprint is concentrated in two defense and diplomatic agencies. The Department of State's Bureau of Overseas Building Operations accounts for eight awards ($522 thousand combined potential value) centered on preventive maintenance and emergency repair of geothermal HVAC systems at U.S. Embassy facilities in South Korea, including the Embassy Annex in Seoul, the Chancery Maintenance Residence, Yongsan Engineering Housing, and the Pusan Commander's Compound. The Department of the Army's Engineering District Far East (Defense Commissary Agency line item) anchors the remainder with a single $4.2 million definitive contract through August 2029 for comprehensive HVAC and refrigeration maintenance at military commissary facilities, including walk-in freezer and cooler equipment at Osan Child Development Center. Osung also subcontracts O&M services to J & J Maintenance Inc. on two task orders awarded in October and November 2025. Representative prime work includes a $102,621.59 geothermal HVAC preventive maintenance and emergency repair purchase order from State (April 2026, completion May 2028), a $23,707.92 State purchase order for HVAC system preventive maintenance at the Embassy Annex (April 2026, completion April 2031), and a $106,949.69 State purchase order for geothermal HVAC maintenance at the Chancery Maintenance Residence and Yongsan Engineering Housing (March 2025, completion March 2026).

Activity has grown from two awards each in 2023 and 2024 to five in 2025 and two in 2026, with eleven total awards generating $4.8 million in combined potential value and $2.4 million obligated to date. Two awards totaling $134 thousand face ultimate completion inside the next twenty-four months. Osung's capability set is concentrated under NAICS 541512 (Commercial and Industrial Machinery and Equipment Repair and Maintenance) and covers HVAC preventive maintenance, emergency repair, parts replacement, and chiller services at diplomatic and military installations. The vendor sits on the Operations and Maintenance Engineering Enhancement VII vehicle through two task orders. Osung operates solely in South Korea and has no domestic U.S. facility footprint in recent awards.