Yibon Construction Co., LTD.

Yibon Construction Co., LTD., a South Korean construction firm headquartered in Seoul, is a prime contractor delivering general construction, facility repair, airfield pavement work, and design-build services to U.S. military installations across South Korea, competing on full-and-open basis without set-aside designations across its footprint.

Yibon operates as a for-profit entity with no minority or small-business certifications, holding a 465-award prime portfolio valued at $29.62 billion combined potential value. The vendor's work centers on military facility maintenance, repair, and capital improvement: representative examples include a $4.23 million definitive contract from Army Corps of Engineers Far East to add and repair petroleum operations infrastructure and electrical systems at Osan Air Base (awarded July 2023), a $3.61 million Defense Health Agency delivery order for medical gas component replacement at Osan Air Base (awarded September 2025), and a $4.5 million Marine Corps delivery order for typhoon damage repairs and slope stabilization at Camp Mujuk (awarded August 2024). The portfolio spans facility repairs, demolition, HVAC system installation, roof replacement, pavement repairs, lightning protection systems, and airfield paving across multiple installations.

Customer concentration is extreme: the top five funding agencies account for 82 percent of all awards by count, with the Department of the Army Corps of Engineers Engineering District Far East driving $26.76 billion of the $29.62 billion total potential value across 56 awards, while the Department of the Army Installation Management Command Pacific Region places the highest number of task orders (181 awards) worth $2.18 billion combined. The Air Force Pacific Air Forces, Army IMCOM Korean Region, and Marine Corps round out the active customer set. The two customer rankings diverge sharply — ENDIST Far East dominates potential value but issues fewer orders, while IMCOM Pacific issues high-volume, lower-dollar maintenance and repair task orders.

Yibon holds five parent vehicle positions: a $400 million design-build Indefinite Delivery/Indefinite Quantity Multiple Award Task Order Contract with Army Corps of Engineers Far East (June 2024 award, extending December 2029) supporting construction and repair projects Korea-wide; four separate $245 million multiple-award IDIQs with Army Installation Management Command Pacific Region and Korean Region (all October 2023 awards, extending October 2028) for general construction repair and upgrade under the Operations and Maintenance Account; and a $25 million single-award airfield paving IDIQ with Army Corps of Engineers Far East (June 2023 award, extending December 2026) designated for airfield paving and minor construction across Osan, Kunsan, Suwon, and Kwangju air bases. These six vehicles collectively anchor the vendor's task-order pipeline, with most recent activity showing seven awards in 2026 and eight in 2025, trending slightly below the 35-award peak in 2023. The near-term recompete risk is moderate: seven awards (combined potential value $12 million) complete within the next twenty-four months.

Activity per year has declined from the 2023 peak of 35 awards to single-digit annual task orders in recent years, reflecting the vendor's dependence on parent vehicle task orders issued by multiple agencies against a small number of standing IDIQs. Place of performance for all work is South Korea, with administrative oversight at military installations throughout the Korean peninsula under the Status of Forces Agreement framework governing U.S. Forces Korea operations.