He can serve in the cabinet and serve elsewhere in the game.
Also,
In regards to the Senator from the Midwest's point about Hifly's foreign policy being a plus for the administration:
Could you really find no one else? It's not like non-interventionists and pacifists are rare in this game?
The problem becomes getting a pacifist who wants to do it past the senate. I can start going through some non-interventionists in the game, probably - if they will accept, or leave the office vacant or nominate trolls. Whatever.
Forgive my ignorance, Mr. President. Hifly has already contacted me splainin in common folk details that he'd like to do both jobs. A brave Herculean task to be fair, but I must protest that this will only drain him of the proper power levels to put up a decent challenge to the Democratic Republican Front in the Mideast.
Other than that, I don't really have any strong protest to his nomination other than that there certainly are more anti-war fish in the sea. I'll be honest, I certainly wouldn't do the SoEA job (because I"m admittedly extremely busy as it is IRL), but if you asked around I'm certain you could've found people who might express a sudden interest.
But enough big words. I just hope you know what you're doing.
