October 8, 2025 – Tampa, FL – Verdantas, a leader in digitally enabled technical consulting solutions for the environment, water, and energy‑transition markets, announces the acquisition of Colibri Ecological Consulting, LLC, a California‑based firm renowned for its ecological planning, regulatory permitting, and field‑survey services. This acquisition enhances Verdantas’ natural‑resources and regulatory‑compliance capabilities and expands its presence in the western United States.

October 14, 2025 – Dallas, TX – Trinity Consultants, a global consulting firm delivering environmental health & safety (EHS) and life‑sciences services, announces the acquisition of Benchmark Risk Group, a Chicago‑based scientific consultancy specializing in chemical, physical and biological exposure risk assessment. The deal expands Trinity’s Life Sciences division and strengthens its Risk Science & Safety business line, enabling enhanced technical offerings in exposure science, toxicology, industrial hygiene and epidemiology.

October 15, 2025 – Nashville, TN – SLR Consulting Ltd., a global provider of sustainability, engineering, and environmental services, announces the acquisition of Forte Dynamics and Forte Analytical, U.S.–based specialists in mine engineering, heap‑leach design, and metallurgical laboratory testing. This strategic acquisition strengthens SLR’s capabilities in the North American mining and critical‑minerals sectors, expanding its technical reach across metals, minerals, and battery‑supply‑chain markets.

October 15, 2025 – Baltimore, MD – Hord Coplan Macht (HCM), an integrated architecture, landscape architecture, interior design, and planning firm, announces that Path21 Architecture & Planning, a Denver‑based healthcare and commercial architecture design firm, has joined the organization. This integration enhances HCM’s healthcare design capabilities and strengthens its presence in the Rocky Mountain region through combined resources and expanded multidisciplinary design services.

October 16, 2025 – Las Vegas, NV – Certerra, a leading provider of technology‑enabled testing, inspection, and certification services for critical infrastructure, announces the acquisition of Farabaugh Engineering & Testing, a Northeast‑based firm specializing in product testing, auditing, and engineering services for construction and building components. The acquisition expands Certerra’s Analytical Labs and Building Products Divisions, enhancing its technical capabilities and geographic reach in key U.S. markets.

October 17, 2025 – Seattle, WA – Cumming Group, a North American leader in project management and cost consultancy, announces the merger with Seneca Group, a premier real estate advisory and development‑management firm headquartered in Seattle with offices in Nashville and Washington, D.C. The combined team brings over 70 Seneca professionals into Cumming, increasing its Pacific Northwest presence and enhancing its ability to serve blue‑chip clients with expanded advisory, project‑management and cost‑consulting expertise.

October 20, 2025 – Natick, MA – WSB, one of the nation’s fastest-growing infrastructure engineering and consulting firms, has acquired Agbara Engineering, a power delivery engineering firm focused on transmission, distribution, and substation design. The acquisition strengthens WSB’s capabilities across the full lifecycle of energy infrastructure projects and accelerates the firm’s ambition to build a nationally scaled energy practice.

October 21, 2025 – Orlando, FL – TLC Engineering Solutions, a national leader in engineering and professional services consulting, announces the acquisition of Tarantino Engineering Consultants (TEC), a structural and forensic engineering firm recognized for its technical expertise and over 12 years of proven performance. The addition of TEC strengthens TLC’s structural engineering capabilities, expands its presence in the Baltimore–Washington, D.C. region, and enhances its ability to deliver innovative, high‑performance engineering solutions through combined technical depth and collaborative project delivery.

For a full list of PSMJ’s transactions please click here.