Good question. A Federal employee who is not acting within the scope of his or her employment is eligible to participate.
If you’d like to participate, I suggest checking with your local General Counsel/Employee Ethics division to see how you can participate.
The eligibility section of the rules says, in part:
6) Eligibility to participate in the competition. To be eligible to win a prize in this competition, an individual or entity: * * * * * c) May not be a Federal entity or Federal employee acting within the scope of his or her employment.