Which storage option are you using when deploying your SSIS packages from BIDS? (msdb or filesystem?). I have found that storing them to msdb on the server by choosing "File | Save Copy of Package AS" works best. Important: You have to choose "Rely on Server Storage and roles for access control" for Protection Level in the Save As window. By doing it this way, you don't have any problems running the package from jobs and don't have to use a proxy account. Does anyone else do it this way? However, I did find this article very useful in understanding the Security changes in 2005. Thanks!!