Thinking like a historian

Your resume is a marketing document, not an autobiography that details every past role and responsibility. Your objective it trying to prompt a purchase decision, which is to invite you in for an interview.

Delve into job boards and companies' careers pages. Pull a few postings, and find what theme or criteria keep coming up. For instance, if you continually find that they need someone who can solve complex problems and navigate ambiguity, and you can do that, then put it in your resume.