I think Fiznat misinterpreted Lone Stars post. The License lapses after a grace period, which means it is ineligible for renewal. The second paragraph pretty clearly states that continuing to work with an expired credential is a felony under Michigan law.
Secondly I've got to take exception to Fiznat's personal opinion that having knowledge of a company condoning the continued practice by individuals with expired credentials. It seems like a recurring theme on this (and many other) forums is the lack of respect that EMS is given by other health care professionals. Could it be that one of the reasons is that we refuse to police ourselves? What do you suppose is the ANA's view of unlicensed nurses working, or that of the AMA on unlicensed physicians? I have no illusions that this one issue will be the golden key to respect from our fellow health care providers, but shouldn't this be a start? "If not us, who? If not now, when?"
To the OP, make the call.