have at it.
https://www.govinfo.gov/content/pkg/GPO-PLUMBOOK-2016/pdf/GPO-PLUMBOOK-2016.pdf
note the abbreviations - may come in handy when deciphering “Q”
SES has their own insigna
https://duckduckgo.com/?q=Senior+executive+service+insignia&t=opera&iar=images&iax=images&ia=images
SES website - SES governed by OPM ?
https://www.opm.gov/policy-data-oversight/senior-executive-service/overview-history/
These people can be shuffled from area to area\ title to title - slippery bastages
https://www.opm.gov/policy-data-oversight/senior-executive-service/facts-figures/#url=Demographics