The global construction market has taken a series of hits over the past couple of years. First, there was the economic slowdown in China, hurting the mining-and-metals sector as Chinese imports dried up. Then, the plunge in oil prices hit markets in that sector and spending in oil-producing countries. Now, international contractors are being forced to assess the impact of Britain’s exit from the European Union as well as growing political turmoil in the Middle East and elsewhere.

The uncertainties in the international construction market can be seen in the results of the ENR Top 250 International Contractors list. On this list, firms are ranked based on contracting revenue from projects outside of their home countries, measuring their presence in international commerce. ENR’s Top 250 Global Contractors list ranks contractors based on total worldwide contracting revenue, regardless of the projects’ locations.