Applied via LinkedIn and shared my resume. Pre-screen was a MS Word document with about 8 questions about background and experience. Afterward, I had a brief LinkedIn chat with the recruiter, and then was ghosted. Apparently, the "nice to have" attribute of holding an active security clearance (listed in the JD) is actually a hard requirement. No follow-up, no offer to continue the interview. Had I known this, I would not have applied.