Unfortunately, I haven't.
But I have an elderly distant family member, a teacher lady far from sci-fi or supernatural realm, who spoke to us very privately of an experience back in the '90s of an UFO sighting, and never went out of family with it being afraid of ridicule.
There are a lot of us here, various backgrounds and age and observation opportunities. All anonymous. CMDR XYZ. No one will investigate you, make reports for your employers or superiors, it won't affect your promotion nor will question your sanity.
So, does anyone here have a real life UFO/alien story?