I was instrumental in...

Meaning

I played a crucial role in...

Examples

• John: The project's success is largely due to teamwork.
• Alice: That's true, but John, <b>I was instrumental in</b> securing the initial funding.
• John: Yes, you played a key part. Without you, we wouldn't have the resources.
• Alice: I'm glad I could contribute. <b>I was instrumental in</b> getting the necessary permissions as well.