Provide your own transportation to construction sites (be mindful of possible damages to your car due to bad weather, debris on site, construction equipment, etc).
Testing equipment can be burdensome at times (require a vehicle with plenty of trunk space)
Be mindful of weather conditions, will need to work outside during weather conditions on either side of the spectrum (prepare yourself for cold/hot weather)
May not get full 40 hour work week due to rainy/snow days