What to say:
I have been thinking of moving on to a larger organization for a while so that I can bring my skills to a large-scale audience. When I saw this opportunity at [ORGANIZATION] open up, I knew I had to apply. My background in [EXPERTISE FROM JOB POST] and [EXPERTISE FROM JOB POST] seems to line up perfectly with the position, which is so exciting to me.
As a part of [COMPANY'S] team, I can see my future as a [JOB TITLE] open up before me. I believe I can bring my [SKILLSET] to [PROJECT] as well as gain new experience to grow my career within [COMPANY.] I am so excited for this opportunity to propel my career at an organization like [COMPANY.]