Presently, GBA is the largest engineering firm in the United States specializing in dredging and marine related projects. With offices in Philadelphia (PA), Wilmington (DE), Baltimore (MD), Wilmington (NC), Tampa (FL), Houston (TX), Los Angeles (CA) and San Francisco (CA), GBA is strategically located to meet each client’s needs. GBA of NC, PLLC maintains an office in Wilmington, NC to provide engineering services in North Carolina.