Do you have a particular entity in mind?
James Randi Educational Foundation
Founded 1996
Founder James Randi
Type 501(c)(3)
Registration no. 65-0649443
https:// en.wikipedia.org/wiki/James_Randi_Educational_Foundation
"The organization has been funded through member contributions, grants, and conferences, though it will no longer accept donations or memberships after 2015."
https:// en.wikipedia.org/wiki/James_Randi
Links to Form 990s for 2014, 2015, 2016
http://990finder.foundationcenter.org/990results.aspx?990_type=&fn=James+randi+educational+foundation&st=&zp=&ei=&fy=&action=Find
You'll find donor / grant info in the 990s.
Incorrect. SES are accountable to Agency head or President. Either can fire.
https:// www.opm.gov/policy-data-oversight/senior-executive-service/reference-materials/guidesesservices.pdf
Use a search engine.