Start with your action.
What did you personally coordinate, build, analyze, resolve or deliver? Choose a verb that matches your actual responsibility. Supporting a project and owning it are both useful experience; describe the right one.
Add the context that gives it meaning.
Name the kind of project, audience, process or constraint. Avoid confidential customer names or sensitive internal figures. A short phrase often gives the reader enough context.
Explain the result you can support.
Use an outcome when you know it. If a financial result or percentage was never measured, do not invent one. Scope, frequency, complexity and a concrete deliverable can still show useful work.
Read it aloud.
Remove phrases you would not use in a professional conversation. If the sentence is difficult to explain in an interview, simplify it until it sounds like your experience.