Security clearances are used by multiple agencies (DoD, DOE, DNFSB...) but there is no reciprocity between agencies. A Q-clearance granted by DoD should be "portable" if the employee goes to DOE and requires a Q-clearance for that job. Clearances are very expensive (paperwork, investigations, interviews, etc) and the delay in obtaining the new clearance prevents the employee from being fully productive when the join the new agency.
Idea No. 50