Thornton Tomasetti Acquires Simon & Associates, Inc.

Terracon Acquires TAM Consultants, Inc.

December 7, 2020

Engineering Services

Terracon has acquired TAM Consultants, Inc., a 15-person facilities engineering and design firm based in Williamsburg, Virginia. The acquisition expands Terracon's facilities services footprint in Virginia and the mid-Atlantic, and all TAM employees will join Terracon while continuing to operate locally as TAM Consultants, Inc., A Terracon Company.

PS&S Acquires B. Thayer Associates to Expand New York Presence

April 4, 2022

Engineering Services

PS&S has acquired the assets of B. Thayer Associates, a 30-year multi-discipline architecture, engineering, surveying and landscape architecture firm with offices in Woodbury and Long Island City, New York. The acquisition expands PS&S's presence and capabilities in the New York market; founder Barbara Thayer will continue in a leadership role as PS&S pursues a broader infrastructure-focused growth plan.

Leverage Marketing Group Acquires The Simon Group

March 2, 2026

Marketing & Advertising

Leverage Marketing Group acquired B2B marketing firm The Simon Group of Sellersville, Pennsylvania. The merger (effective March 2, 2026) expands Leverage’s market reach and adds capabilities in digital and content marketing.

Tandem Engineering Acquires Ann Arbor Architects Collaborative, Inc.

February 2, 2026

Professional Services

Tandem Engineering has acquired Ann Arbor Architects Collaborative, Inc., a multidisciplinary architecture and interior design firm based in Ann Arbor, Michigan; the deal closed on February 2, 2026. The acquisition expands Tandem’s integrated engineering and project management capabilities by adding architecture, interior design and sustainable-design expertise to its service offering.

Integral Consulting Acquires H. T. Harvey 3 Associates

February 10, 2026

Environmental Services

Integral Consulting Inc., an environmental science and engineering consulting firm, announced its acquisition of H. T. Harvey 3 Associates, a California-based ecological consulting firm. The deal is intended to expand Integral’s ecological consulting and regulatory compliance capabilities and strengthen its presence in California and Hawaii’s environmental services markets.

Team Group Acquires S.&T. Group

September 6, 2024

Industrial Services

Team Group, a global facility management and industrial services provider, has acquired S.&T. Group, a multi-trade contracting and maintenance business serving Northern Ontario. The deal expands Team Group's presence in the Algoma District and brings in S.&T.'s electrical, HVAC, plumbing, data and general contracting capabilities while retaining the target's existing management and employees.