Companies
N3B is a limited liability company owned by HII Nuclear, a division of Huntington Ingalls Industries, and BWX Technologies. Critical subcontractors are Tech2 Solutions and Longenecker & Associates.
Parent Companies
HII supports national security missions around the globe with unmanned systems, nuclear and environmental services, defense and federal solutions, and is America’s largest military shipbuilding company. We are proud partners supporting the Department of Energy missions through site management and operations and all phases of environmental remediation. Headquartered in Newport News, Virginia, HII employs more than 42,000 people operating both domestically and internationally. For more information, visit: hii.com.
At BWX Technologies, Inc. (NYSE: BWXT), we are People Strong, Innovation Driven. Headquartered in Lynchburg, Va., BWXT provides safe and effective nuclear solutions for national security, clean energy, environmental remediation, nuclear medicine and space exploration. With approximately 6,650 employees, BWXT has 12 major operating sites in the U.S. and Canada. In addition, BWXT joint ventures provide management and operations at more than a dozen U.S. Department of Energy and NASA facilities. Follow us on Twitter at @BWXTech and learn more at www.bwxt.com.
Critical Subcontractors
Longenecker & Associates Inc. (L&A), a woman-owned small business, brings more than 25 years’ experience in working across the U.S. Department of Energy complex to strengthen quality and improve mission performance. With about 230 internationally recognized experts, L&A supports the government or its contractors at all major DOE sites, including Hanford, Savannah River, Idaho, Oak Ridge, Sandia, Los Alamos, WIPP, Pantex, Nevada, Portsmouth and Paducah, as well as similar sites in the United Kingdom and Canada. As a values-based company, L&A’s core values are a critical part of how its business is conducted, and it brings proven governance approaches to optimize mission delivery.
Tech2 Solutions is a joint venture formed by partners Sealaska Technical Services LLC and Tetra Tech Inc. Through our parent companies, we provide more than 50 years of experience in water and waste water engineering and remediation. Sealaska is an Alaska Native Corporation with broad water and soil remediation experience. Tetra Tech is a leading provider of consulting and engineering services supporting commercial and government clients focused on water, environment and resource management. With 21,000 staff worldwide, Tech2 Solutions provides clear solutions to complex problems.
Latest News
Los Alamos Tour Informs Senate Committee Staff About Legacy Cleanup
September 9, 2025 - Staff from the U.S. Senate Energy and Natural Resources Committee and New Mexico staffers with Sen. Martin Heinrich’s office toured...
Los Alamos Completes 200th Transuranic Waste Shipment to WIPP
August 19, 2025 - The 200th transuranic shipment from Technical Area 54, Area G, at Los Alamos National Laboratory heads to the Waste Isolation...
N3B Commences Shipment of Corrugated Metal Pipe Waste Stream from LANL to WIPP
June 11, 2025 - N3B has begun off-site shipments of transuranic (TRU) waste from previously buried corrugated metal pipes (CMPs) for permanent disposal. This...