Private programs can define the skills and requirements they look for in hackers (see customer-facing documentation here). If you meet the criteria, you may receive an invitation or find the opportunity listed on your Opportunities page under Available private opportunities. You will have a limited number of private opportunities you can join every 30 days, but these listings don’t affect any invitations you may receive.

To join a private program from the Opportunities page listing, click Claim your spot. If the program has any prerequisites or a privacy agreement, you will be asked to agree to those before going to the Security page.

If you would like to join the program, claim your spot using the button at the top of the page. A warning will appear telling you how many private programs you can still apply to in the current time window or that you've reached your limit for now.

Programs often have limits on the number of participants they accept within a given period. Opportunities may disappear as programs fill up or change requirements but can reappear later.