pontonier
/ˌpɒntə(ʊ)ˈnɪə/(also pontoneer, pontooneer, pontoonier) Chiefly Military
noun
A person in charge of pontoons or the construction of pontoon bridges.
Origin
Mid 18th century. From ponton, variant of pontoon + -ier, perhaps after French pontonnier boatman, ferryman, person who collects fees for ferry passage, engineer in charge of bridge construction.