Ingrid stayed with Piers at Garside Grange (and inherited the Dracula throne), but did she keep her job at the VHC?
She decided not to live in Transylvania, but she got her job back... I assume she travelled over there.
She most likely kept her job with the VHC. She wanted power her entire life, now she's got it I very much doubt any breather, no matter her feelings for them, could make her give it up.
What do you think?