So I got a job offer that's a bit different from what I studied in school( I did processing and Metallurgy but got a job inq Geo tech fly-in-fly out), which pays really well. A few days later I got another interview in my field of study. I signed the contract with my first offer because I wanted to secure a job and didn't think I would get the second one. However I got called for a second interview with the Metallurgy company and they offered me a job hours later.

I was so confused and realized I just couldn't cancel the first one for ethical reasons. The company I declined was surprised that I turned them down and was just curious why I did since the offer was good.

I mentioned loyalty reasons and they understood.

However could this hurt me in future? This is my first job in the field too.