Here are some possibilities:
* Cargo handler: This is the most common and general translation. It refers to someone who loads and unloads cargo, typically at a port or warehouse.
* Loader: This term is more specific and refers to someone who loads cargo onto a vehicle or vessel.
* Unloader: Similarly, this refers to someone who unloads cargo from a vehicle or vessel.
* Stevedore: This term is used for someone who loads and unloads cargo at a dock or pier.
* Longshoreman: Similar to stevedore, this term refers to a worker who handles cargo at a dock or pier.
The best translation will depend on the specific context in which you are using the word "kargador."