CFA designation after Job Title

Good day,

I recently started a new position in a company and my Email signature is automatically pulled from the active directory, meaning that it is not possible to put the designation direclty behind my name. The only option is
“Joe Doe
Manager M&A, CFA”

Would this be permitted? Are there any other suggestions which might be permitted? e.g.

Joe Doe
CFA, Manager M&A


If you are not an active CFA charterholder, you cannot use the CFA designation. simple as that.

You can’t be serious if you are a Charterholder

I suspect the OP was a Charterholder, but for one reason or another decided to stop paying his membership dues. Otherwise, it would make little sense to ask the question.