WATG Acquires SOSH Architects

JS Global (White Wolf Portfolio) Acquires Atlantic Design Group

April 15, 2022

Construction

JS Global, a Maryland-based government services contractor and portfolio company of White Wolf Capital, has acquired Atlantic Design Group (ADG), a metro Washington D.C. architecture, engineering and construction firm focused on Federal government and commercial projects. The deal is an add-on to JS Global’s AT/FP platform intended to expand design capabilities and overseas federal work across the combined client base.

The Stonewall Group Acquires AMDG Architects

September 8, 2025

Engineering Services

The Stonewall Group, a private investment and management firm focused on architecture and engineering (A&E) companies, has partnered with AMDG Architects, an architecture and interior design firm headquartered in Grand Rapids, Michigan. The transaction represents The Stonewall Group's sixth partnership and aims to support AMDG's growth while preserving the firm's culture and design-focused mission.

Wittenbach (Argosy Portfolio Company) Acquires The Gilbertson Group

December 13, 2022

Industrial Services

Wittenbach, a portfolio company of Argosy Private Equity, has acquired The Gilbertson Group (TGG), a family-owned security systems integrator. The add-on strengthens Wittenbach’s density in the Mid-Atlantic (PA/DE/MD), expands cross-selling opportunities into government and commercial markets, and integrates TGG into Argosy’s operational playbook.

The Stonewall Group Acquires ADG Architecture

January 29, 2026

Professional Services

The Stonewall Group, a Lafayette, Louisiana–based platform for architecture firms, has acquired ADG Architecture, LLC, a Fort Myers, Florida–based architecture and interior design firm. The acquisition — which closed on October 31, 2025 — expands Stonewall's Southeast footprint; ADG founders Bob Taylor and Clarisa Parodi will remain involved with Taylor continuing to lead the Fort Myers studio.

Woolpert Acquires Sheehan Nagle Hartray Associates

October 19, 2022

Engineering Services

Woolpert has acquired Sheehan Nagle Hartray Associates (SNHA), a Chicago- and London-based architecture firm known for mission-critical and technically challenging projects serving commercial, civic and education clients. The acquisition expands Woolpert's global presence — adding European capabilities — and enhances its design expertise in areas such as data center and computational design.

WSB LLC Acquires CAS Consulting & Services, Inc.

October 7, 2025

Engineering Services

WSB LLC, a GHK Capital-backed national design and consulting firm, has acquired CAS Consulting & Services, a multidisciplinary civil engineering firm headquartered in Austin, Texas. The add-on brings four offices and 38 employees to WSB and strengthens its water/wastewater, water resources and construction management capabilities while expanding WSB's presence in Texas and the southwestern United States.