[NonLinear]

My understanding is that covert officers work in the Directorate of Operations, analysists work in the Directorate of Intelligence. That Plame worked in the former strongly suggests that Wilson's description of her is accurate.

No doubt that covert officers work at the Directorate of Operations, since that is the covert divison of the CIA. Your logic appears to be:

Covert officers work in the Directorate of Operations
Valerie Plame Wilson worked in the Directorate of Operation
ergo Valerie Plame Wilson was covert.

Sorry - doesn't wash. You need the word "ONLY" at the start of the first premise to support the conclusion.

[liberallarry]

Your logic appears to be:
Covert officers work in the Directorate of Operations
Valerie Plame Wilson worked in the Directorate of Operation
ergo Valerie Plame Wilson was covert.

My logic is
Covert officers work in the Directorate of Operations
Valerie Plame Wilson worked in the Directorate of Operation
She had enough power to participate in important decision-making
She and her husband say she was covert
ergo Valerie Plame Wilson very likely was, or had been, covert.