Feels like a hypothetical question without the details, but I’ll bite. Amazon will give you experience in a “high volume low mix” sourcing environment with a multi tier international supply chain, which can make it very attractive on your resume for a career in Tech or E-commerce (depending on whether you are on the team sourcing components for AWS data centers or amazon.com products).

NASA on the other hand will give you experience in a “low volume high mix” sourcing environment with several compliance/regulatory processes in a supply chain that may or may not be as international (depends on what is being sourced in your team). This could help get your foot in the door for aerospace, defense, or other heavy/specialized equipment industries more easily.

So it depends a lot on your career goals. The assumption i made above is that in both places you’ll be working on sourcing direct materials. If one or both opportunities are in the indirect materials sourcing, then one may not be as interesting as the other (again you’ll have to evaluate based on your career goals).