| 1918 | First Customs Brokerage Opens |
| Company Founder William F. Willson opens first customs brokerage office at the ferry landing in Fort Erie, Ontario for traffic from Buffalo, N.Y. | |
| 1930 | First Customs Brokerage at Peace Bridge |
| Willson becomes first customs broker at newly-constructed Peace Bridge at Fort Erie, Ontario | |
| 1965 | Niagara Falls |
| Willson opens Niagara Falls, Ontario office | |
| 1968 | Purchasing Assets Expansion |
| Company expands, purchasing assets of W.H. Adams Ltd. at Ambassador Bridge and Windsor-Detroit Tunnel | |
| 1973 | Bluewater Bridge |
| Willson opens office at Bluewater Bridge in Sarnia, Ontario | |
| 1986 | International Forwarding Begins |
| Establishes international forwarding business for truck and international freight | |
| 1987 | New Offices Open |
| New offices opened in Niagara Falls, N.Y., Buffalo, Detroit and Port Huron, Michigan | |
| 1990 | Electronic Processing Launches |
| Launches electronic processing of entries and transmission to customs | |
| 1991 | Client Services |
| Creates client service department to provide clients with one consistent service contact | |
| 1998 | Mississauga, Ontario |
| Moves executive, sales and accounting offices to Mississauga, Ontario | |
| 2003 | Certifications Awarded |
| Certified under U.S. Customs-Trade Partnership Against Terrorism (C-TPAT) and Canada’s Partners in Protection (PIP) programs | |
| 2005 | Client Portal Unveiled |
| Unveils web-based Client Portal providing clients with online access to key customs transactions information | |
| 2007 | Client Data Integration |
| Introduces cutting-edge Web and electronic systems — reducing data entry time for customs paperwork, shortening clearance times and enhancing Willson-client data integration | |
| 2008 | Freight division merges with Green Global Logistics |
| Freight division merges with Green Global Logistics to create Willson-Green Logistics — offering an enhanced international network and support for truck, air and ocean transport | |
| 2015 | Brand Refresh Revealed |
| Willson International launches a brand refresh with a new corporate identity |
