DLR Group Acquires Collins Cooper Carusi Architects

Corgan Acquires Cooper Robertson

November 3, 2025

Professional Services

Dallas-based architecture and design firm Corgan has acquired New York–based Cooper Robertson. Terms were not disclosed; Cooper Robertson’s team and client relationships will integrate into Corgan to deepen its presence in the Northeast and expand capabilities across higher education, civic, and cultural design markets.

Little Diversified Architectural Consulting Acquires Hughes Group Architects

May 23, 2023

Professional Services

Little Diversified Architectural Consulting has acquired Hughes Group Architects, a Sterling, Virginia-based architecture firm. The deal expands Little’s design capabilities in public safety, higher education, K‑12 and recreation facilities while strengthening its presence in the greater Washington, D.C. market.

SLR Consulting Acquires A. DiCesare Associates, P.C.

October 8, 2025

Engineering Services

SLR Consulting has acquired A. DiCesare Associates, P.C. (ADA), a Connecticut-based engineering firm specializing in highway and railroad bridge inspection, bridge design and underwater inspection services. The deal strengthens SLR’s transportation engineering and inspection capabilities and deepens its client relationships with state transportation agencies and rail clients across the U.S. Northeast.

DCCM Acquires Coastland Civil Engineering

December 3, 2021

Engineering Services

DCCM, a national design and construction management firm based in Houston, has acquired Coastland Civil Engineering, a Santa Rosa-based civil engineering and construction management firm. The acquisition expands DCCM's presence on the U.S. West Coast and brings Coastland's public-agency-focused capabilities into DCCM's national platform, with Coastland CEO John Wanger remaining in place.

DCCM Acquires Rochester & Associates

September 2, 2021

Engineering Services

DCCM, a Houston-based design and construction management services platform, has acquired Rochester & Associates, a civil engineering and land surveying firm based in the greater Atlanta (Gainesville), Georgia area. The purchase (an add-on to the DCCM platform backed by private investor White Wolf) expands DCCM's geographic footprint and service capabilities across the Southeast U.S.

Corgan Acquires Dyer Brown

August 4, 2025

Professional Services

Corgan, a global architecture and design firm headquartered in Dallas, has acquired Boston-based Dyer Brown, integrating the 56-year-old interiors and workplace practice into Corgan's platform. The deal strengthens Corgan's East Coast presence and expands its interior and workplace capabilities, giving Dyer Brown's clients access to broader national and global resources.