Caissons, Piers, Pile Driving license entitles its holder to engage in the business of installing piers, caissons and pilings through the use of pile driving equipment and machinery, including necessary excavation, grading and clearing for site preparation for pile driving activities. Cut, weld, join and fabricate caissons or piles. Install all necessary concrete and reinforcing steel within the caissons to create a structural member. Requires two years experience.