Package run on SQL Server Job Agent - Login failed for user

I created a package on my SQL Server (2012) through the import/export data wizard which exports data to another SQL Server (2008).

I set up a job which runs this package but I get an error:

Description: Failed to decrypt protected XML node "DTS:Password" with error 0x8009000B "Key not valid for use in specified state."

I found suggestions to set the Protection Level to "DontSaveSensitive", but after running it again on the job, I get this new error:

"Login failed for user 'username'.".

Note, running it on it's own / manually, it works fine. It is only failing on the job.

Any help is appreciated.

This was a permissions issue. I changed the user account of sql server agent to Admin and it worked.

However, as I learned, this is a bad security practice, so I'd appreciate if there are other ideas out there to get around this.