I am sorry but in "Emissary", IE the first episode, Sisko says "My father WAS a gourmet chef."
You don't stop being a gourmet chef because you retire. The only way you can stop being one is by dying.
I rest my case.
You rested it way too soon.
Of course you may stop being a gourmet chef before you die. If you continue cooking gourmet meals for friends and family after you retire, then you still are a gourmet chef. If you pretty much stop cooking when you retire, then you WERE a gourmet chef.
My father was an electrical engineer and a talented artist. When he developed Alzheimers in the last years of his life, he was no longer either.