Black Construction / Mace International Joint Venture

Black Construction / Mace International Joint Venture, a Guam-registered partnership and child entity of Tutor Perini Corporation, executes full-and-open construction and infrastructure maintenance services for U.S. Navy installations as a prime contractor under multiple-award indefinite-delivery contracts, with no subcontract footprint and no set-aside category usage. The joint venture holds a dual mandate under bilateral U.S.-U.K. defense agreements requiring composition of at least 60 percent U.S. and 20 percent U.K. ownership to perform work at Diego Garcia and the British Indian Ocean Territory.

The joint venture's entire recent portfolio sits with Navy facility customers. Navy Installations Command funds 50 awards totaling $2.22 billion in combined potential value — 80% of the joint venture's total portfolio. Naval Facilities Engineering Command, the Office of Naval Research, and Defense Logistics Agency Energy round out the Navy customer set with 26 awards worth $443 million, 9 awards worth $74 million, and 5 awards worth $32.6 million respectively. Combined, these five Navy-aligned customer units represent 92 awards and $2.77 billion of the joint venture's $2.79 billion combined potential value.

The joint venture holds positions on two active multiple-award IDIQs: the Design-Build/Design-Bid-Build Multiple Award Construction Contract for Diego Garcia 2025-2033 (awarded September 10, 2025, $1.5 billion ceiling, extending through September 2033) and the earlier Diego Garcia and British Indian Ocean Territory Multiple Award Construction Contract 2021-2026 (awarded September 3, 2021, $448 million ceiling, completing September 2, 2026). These two vehicles carry 21 task orders worth $161 million of combined potential value. Two predecessor Navy contracts—N4008418D0066 and N6274214D1303—remain active with 30 and 37 task orders respectively, carrying $161.4 million and $96.6 million in combined potential value.

Across recent task orders, the joint venture delivers electrical infrastructure work (power pole replacement, pad-mounted switch installation, motor control center repair), mechanical systems (water tank replacement, air conditioning and direct digital control system retrofit, standby generator and automatic transfer switch installation), facility renovation (door replacement, roof repair, incinerator and geodetic operations building rehabilitation), heavy civil infrastructure (North Parking Apron repairs, DG1 Road repair, synchrolift repair), specialized military construction (antenna installation, barricaded weapons storage module repair), fire protection (fire alarm system replacement, secondary tank farm fire hydrant repair), vehicle maintenance infrastructure (exhaust extraction system installation), and environmental remediation (lead and asbestos abatement). Representative recent awards include a $43.5 million delivery order issued March 30, 2024 for North Parking Apron repairs at Naval Support Facility Diego Garcia, a $41.9 million Office of Naval Research-funded delivery order from September 2023 for the X02X SKYVIEW Antenna Project, a $19.7 million September 2022 synchrolift repair order, and a $6.08 million September 2025 order for Food Service Storage Building repairs under the newer 2025-2033 IDIQ. Task order ranges across both IDIQs span $150,000 to $50 million.

Activity has accelerated in recent years—two awards in 2022, six in 2023, nine in 2025—with ten orders (combined potential value $30.4 million) reaching completion within the next twenty-four months and triggering recompete risk. The joint venture has obligated $489.4 million across its $2.79 billion combined potential value, reflecting 18 percent invoiced performance. Recent awards (within the past three months) include the March 25, 2026 primary surface clearance zone order worth $4.7 million, indicating sustained task order velocity across the parent IDIQs.