I think it varies from field to field.

For example, the US auto industry has mostly moved to metric for designing new cars.

From what I've heard, the vast majority of civil and structural engineering in the US is still on customary. (A few state highway departments tried to move to metric, but actually ended up moving back, since using metric when the rest of the industry was still on customary was costing them more money.)

US aerospace is still mostly customary, but NASA has been encouraging greater use of metric in space applications (due to the Mars Climate Orbiter debacle). And you'll notice SpaceX's webcasts all have metric units for telemetry – I believe SpaceX prefers metric wherever possible.