Both will be promoted in a ceremony on Friday.
Moss, who has been with the department for 23 years, will be senior executive assistant to the chief.
He'll be in charge of the PIO office, so you'll still be hearing from him.
Here's a link to a post cops reporter David Ovalle wrote on Carbana's first homicide.
"I'm looking forward to a new chapter in my police career," Carbana said Tuesday. "I definitly have been very lucky to have the opportunity to be in this office. I'll miss this position greatly."