Please ask what kind of project needs two electromechanical constructor this

Electromechanical professional constructor in the following industries need: electromechanical installation engineering companies, electric power construction companies, construction companies involved in plumbing and heating installation companies need to simply build a house company in the construction category called civil or infrastructure companies do not need to civil engineering qualification companies only need to specialize in the certificate of construction engineering (build a house does not need electromechanical professional)