I retired from the RAF "retaining the rank of wg cdr" and got a job as an
SEO/SBL/Grade C1 - level civil servant where I served the RAF for another 16 years.
I was never tempted to use my rank - would have been embarrassing since most of my bosses were sqn ldrs.
Most knew my background so would occasionally ask my opinion but I never ever thought of using the rank to my advantage.
(The advantage for the RAF was that occasionally when my boss's post was gapped, they would ask me to run things for a while)
After full retirement the only letter I get to "Wg Cdr Radar101" is my RAFA subs letter.