"He is disappointed at not being offered the job. But I think he will move on."

Or another possibility:

"He is disappointed at not being offered the job. But I think he will find another opportunity."

It seems like you're expressing a thought about someone's disappointment regarding not getting a job offer but also holding out hope that they will eventually succeed. If you want to expand on this idea or create a more complete statement, here’s one possible way to finish your thought:

"He is disappointed at not being offered the job. But I think he will find another opportunity that suits him better and brings him the fulfillment he deserves."

Feel free to adjust it based on the sentiment you'd like to convey! Would you like to add more details or context?