engineers discussing over blueprint at construction site

30s 3539 4044 40s adult analyzing architect authority away beginnings blueprint building business caucasian clear clothing colleague communications concentration construction contractor conversation daytime discussion document engineer ethnicity examining gesturing halflength hard hat helmet industry looking male man manager men midadult middleaged mountain occupations outdoors paper people planning plans poland professional protection protective safety sand scrutiny showing site sky standing sunshine supervisor talking teamwork two vest warsaw worker working years