It's an informal process filling out paperwork and answering questions around availability and what work experience you've had. They describe what the work is like and what the events are like and what's expected of you.
I applied through other source. The process took 2 weeks. I interviewed at ACES Group (Arlington, VA) in Jul 2019
Interview
Phone interview which screened me for knowledge with SharePoint. It followed by in person interview with the existing team. I was eventually offered the position, but then the company found out that I didn't have a clearance.
