We have TA's at Amazon for L12 (Jassy) and L11 (SVP).
However, being a TA also involves active advising and commenting first on document reviews (a lot of executive communication at Amazon is via written documents and review meetings that begin with a doc read). Many of our executives were former TA's.
FWIW there's a lot of politics in this process. Existing talent in SEA is far more likely to get selected for these roles rather than offering global top talent a 2 year stint in SEA to see if it fits. The people that receive these TA positions are purposefully selected and groomed for future exec roles. The program does have a good track record of success but they made a few bad bets as well.
Elaine isn’t based in Seattle and got picked to be the UC TA (and she isn’t the only TA in the last few years to not be Seattle) so you’re not wrong, but “far more likely” seems a stretch.
However, being a TA also involves active advising and commenting first on document reviews (a lot of executive communication at Amazon is via written documents and review meetings that begin with a doc read). Many of our executives were former TA's.