My name is ***** ***** I am an experienced criminal
"What should he do?" is a much too general question, to which I can only respond, "If he didn't do this, he needs to retain a criminal lawyer and fight the case."
Your brother is charged with a serious offense that has a maximum possible penalty of 10 years of prison and/or a $15,000 fine. This is his maximum risk if convicted and, of course, he'd be expected to make restitution to the company he defrauded.
Typically, if a defendant charged with a theft offense has no prior felony record, he would generally be given the opportunity to take a deal involving probation, but your brother has a history of theft, and the prosecuotr may be less generous than that.
I'm not sure what your brother wants to know. General questions get general answers. He needs to show up in court
with a lawyer, plead not guilty and fight the case. If he can't afford a lawyer, he can plead not guilty and ask the judge to appoint him a public defender.
If he had something more specific in mind when he had you ask this question for him, use the reply tab below to tell me what that is, and I will be happy to expand my answer.