Cat Surrender Options?

I have two brothers (Domestic Short Hair) that need to be rehomed due to circumstances where I can no longer care for them.

What are some options?

Orange is Bowser and Gray is Yoshi.

I rescued them a couple years ago but my job entails me to move multiple times in the last year and go abroad so I can't be there for them.

My family doesn't really know how to take care of cats and they unfortunately neglected them without telling me.

It breaks my heart but I'd rather see them happy with another family and be cared for than be selfish and make them suffer while I can't be around as much.

Thank you for your time.