Thank you for your years of dedicated service. You had a profound impact on the world and America is better for it.
This is what a friend who was successfully hired as a CEO recommended to me in the Social Impact space:
nrgconsultinggroup.com
dsgco.com (koya is a part of this)
bridgepartnersllc.com
good-insight.org (not super impressed by them but they have a lot in the DC area)
360 group
http://www.the360group.us
encore.org
Otherwise Wayan Vota has been doing a lot in this space and hosting Zoom calls with recruiters, if you check out his substack. Good luck.