All applicants had to be Certified Air Traffic Controllers to be eligible to bid for this job. The job announcement was posted online at USAJobs.gov. The application had to be submitted online, and involved uploading a resume and answering four essay questions (aka KSa's) - each with a 4000 character limit. The best qualified candidates were interviewed (your choice of in-person or via telephone) by a panel of four. The questions all pertained to managing people and government employment policies, not technical air traffic situations.