launchd hogging the CPU
I would start by checking the folders /Library/LaunchAgents and /Library/LaunchDaemons. In these folders you will find a bunch of "plist" scripts that tell the system how and when to launch certain pieces of software.

I think you'll find one there that tells the system to launch this "alumni" software. Given that the software doesn't appear to exist on your system as reported by the errors in your logs, you are safe to delete the relevant plist file. Then reboot for the change to take effect.

Please be careful though not to delete any of the other plist files unless you are certain what they are.