Start with an action verb
Lead with what you did: organized, built, resolved, trained, reduced, launched. Avoid starting with "Responsible for".
Add the result or the scope
Answer "so what?" A useful pattern: action + task + result. If you have a real number (team size, items handled, time saved), include it. If you don't, describe the scope instead — "for a 3-location business" — rather than guessing a figure.
Keep it scannable
Aim for one to two lines per bullet and three to six bullets per role. Recruiters often skim, so the first few words carry the most weight.