Fiji is a table jumper given half a chance, I use a stern voice on her, she knows its wrong but Basenjis do what they want most of the time! Her motivation is usually when following the sun.
How old is he? Moet used to jump on the work tops in the kitchen but seemed to grow out of it, when he was a bit older.
Gossy does this too. My trainer suggested a plastic mat called "scat mat" (available from PetSmart). It is battery powered and gives a very very very minimal shock - equivalent to static electricity. Gossy stopped jumping on the table after only two days. Be sure to cover the battery box with something so your dog doesn't try to eat it.