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Kirby Corporation is a diversified business with operations in the marine transportation and engine services industries. These business units have a shared focus on safety and customer service that has enabled Kirby to be the industry leader in these segments. The key to this success is the employees who work hard every day to deliver the best products and services to our valued customers.

Unsurpassed for 160 Years We operate a fleet of more than 60 tugboats, crew boats, and barges in 13 locations along the U.S. East Coast from Eastport, ME to San Juan, PR. The fleet includes 38 Z-Drive/tractor tugs and 20-plus vessels involved in coastal towing with more than a combined 270,000 H.P. In each port, McAllister is engaged in ship docking (servicing more than 1,000 steamship companies), general harbor towing, coastal towing, windfarm support, and bulk transportation. We are currently building two new tractor tugs at Washburn & Doughty, which will add more than 13,000 hp to our fleet. These assets and our talented teams will ensure that we continue the McAllister family tradition of being an innovative force in marine transportation.

Great Lakes Dredge & Dock (GLDD) is the largest provider of dredging services in the United States and the only U.S. company with significant international dredging operations. GLDD employs more than 1,000 dedicated engineering, operations, and support personnel. GLDD has a rich 135-year history of developing and executing successful dredging and marine construction projects, operating the largest and most diverse dredging fleet in the U.S. comprising approximately 200 specialized vessels.