Which ranks typically classify senior scientific positions at NASA beyond the GS-15 civil service level?

Answer

Scientific and Professional (ST) rank or the Executive Schedule (ES)

A researcher with a Ph.D. working directly for the agency on a permanent basis typically falls under the GS pay scale up to GS-15, but senior scientific roles often transition into the Scientific and Professional (ST) rank or the Executive Schedule (ES).

Which ranks typically classify senior scientific positions at NASA beyond the GS-15 civil service level?
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