Salas O'Brien Acquires TechSource
January 1, 2026
Salas O’Brien has merged with TechSource, bringing TechSource’s scientific and engineering consulting capabilities into Salas O’Brien’s employee‑owned engineering platform. The deal combines TechSource’s deep expertise in national security, nuclear, and high‑tech projects (supporting U.S. national laboratories and federal agencies) with Salas O’Brien’s engineering scale to expand capabilities for federal and critical‑infrastructure programs.
- Buyers
- Salas O'Brien
- Targets
- TechSource
- Industry
- Engineering Services
- Location
- New Mexico, United States
- Transaction Type
- Buyout
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Salas O'Brien Acquires RFS Engineering
January 13, 2026
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Salas O’Brien has merged with RFS Engineering, a New England-based MEP/structural/civil engineering firm, integrating RFS’s 100+ professionals and offices in Boston, Laconia (NH), and Portland (ME) into Salas O’Brien’s national platform. The combination broadens Salas O’Brien’s MEP/FP, structural, civil, sustainability, and commissioning capabilities across New England; AEC Advisors acted as exclusive financial advisor to RFS.
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Salas O'Brien Acquires AME Consulting Engineers
September 11, 2025
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Salas O’Brien has merged with AME Consulting Engineers, a North Carolina-based MEP, fire protection, and technology engineering firm, to strengthen its capabilities across federal, municipal, healthcare, aviation, and education markets. AME brings more than 30 team members and deep experience in complex facility renovations, while the deal expands Salas O’Brien’s technical capacity and regional presence.
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Salas O'Brien Acquires Carolina Engineering Solutions
April 22, 2025
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Salas O'Brien announced that Carolina Engineering Solutions of Greenville, South Carolina has joined the firm, strengthening Salas O'Brien’s mechanical, electrical, and plumbing (MEP) design capabilities. The acquisition expands Salas O'Brien’s capacity to serve education, healthcare, and government clients and enables the combined firm to pursue larger, more complex projects.
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Salas O'Brien Acquires FA Engineering
March 24, 2025
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Salas O’Brien has merged with FA Engineering, adding FA Engineering’s industrial engineering, structural and mechanical design, and environmental compliance capabilities to Salas O’Brien’s platform. FA Engineering is based in Pocatello, Idaho and the combined organization expands Salas O’Brien’s capacity to serve industrial end markets including mining, food processing, and waste treatment.
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Blackstone Makes Minority Growth Investment in Salas O'Brien
January 22, 2024
Engineering Services
Blackstone (through Tactical Opportunities and affiliated funds) has made a minority structured growth equity investment in Salas O’Brien, an employee-owned engineering and technical services firm headquartered in Irvine, California. The investment will support Salas O’Brien’s continued expansion in the AEC market — enhancing talent, technology resources, and capability to serve decarbonization, energy transition and critical infrastructure projects; Caltius Structured Capital will remain a minority investor alongside Blackstone.
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Caltius Structured Capital Invests in Salas O'Brien
October 20, 2020
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Caltius Structured Capital closed a growth capital investment in Santa Ana–based Salas O'Brien to support the firm's national expansion through strategic mergers and organic growth. The structured financing (including junior debt and minority equity) is intended to preserve employee ownership while fueling Salas O'Brien's growth across its facility engineering, construction management, technology and commissioning services.
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