The changes involve eliminating the assistant superintendent positions as well as three vacant command positions. There will now be six bureaus within the department, including patrol, detectives and organized crime.
McCarthy says his goal is to simplify and streamline the department.
"We're leaner and we're meaner is what it boils down to. And we'll be reacting faster because there's less clutter in between. And this is going to be an ongoing introspection," he said.
McCarthy says while he's watching the department finances, he is focused on delivering a good crime reducing system.