Two men in hard hats and safety neon vests on scaffolding working outside in the daylight.
Outdoor daytime scene with two workers in safety gear working on scaffolding.
Two men are working outside, so they are doing outdoor work.
Men working outside are workers.
Two men in hard hats and safety neon vests can be rephrased as two workers in safety gear. The setting described as outside in the daylight is a synonym of outdoor daytime.