Need training on importation entries into the U.S with NETCHB software or similar sofware

We are a start up small import company with a licensed custom broker which helps customers imports goods into the U.S. As such we need training from an expereinced entry writer (person that has processed and cleared importation entries with U.S customs using NETCHB software or other similar software). The important thing is that this person has sound experience working for a custom broker or perhaps a retired custom broker and is able to do such entries to help us get the project off the ground.