I wonder did the writers intend for him to be recurring or if they just put him in this episode to flesh out the history of the occupation and they liked Alaimo's performance so much that they brought him back for more?
I'm pretty sure that he was meant to be a recurring character. I know that Alaimo has spoken of how they always intended to flesh out the character more besides a one-shot appearance. Now, did they intend for him to become such an integral part of the story? That I don't know.