Chaplains in the US Marine Corps are actually officers in the US Navy.  Chaplain (LtCmdr) Mark Tews comments on the importance of chaplains to his Marines:

“If a Marine is having a bad day and needs a place to go and to feel safe and talk about any issues, the chaplain is always there for them,” he explained. “For Marines, this is a place of sanctuary where they don’t have to worry about anything and can talk with the chaplain about anything.”