Can refer to someone who manages a tower, often in a maritime context.
El torrero se aseguró de que la luz de la torre estuviera siempre encendida para guiar a los navegantes.
The tower keeper ensured that the light in the tower was always on to guide the sailors.
El torrero se aseguraba de que la luz de la torre estuviera siempre encendida para guiar a los barcos.
The tower keeper made sure that the light in the tower was always on to guide the ships.