Phrases Talking About Work Experience

I was responsible for...

Meaning

I had the duty of...

John: How did the team perform?
Alice: We did well. <b>I was responsible for</b> the design aspect of the project.
John: And how did that go?
Alice: Very smoothly, thankfully. <b>I was responsible for</b> overseeing the whole design process, so I'm pleased with the result.