The President restored his rank to CPO.Is being a Seal a Naval bunk apart from rank?
His rank was saved, but his remaining a SEAL was not. Guys get bounced from the teams all the time.
As with any military branch there is rank (enlisted E1 - E9, officer O1 - O11). Like any other service member there is a path through to different ranks. Time in service, skills assessments, duty stations (sometimes), etc.
And there is a rate in the Navy (MOS ( military occupational specialty) in other services), the job one performs.
SEALS can come from many rates. They gain an additional Special Warfare Operator rate upon completion of training.