Security Clearance To gain a security clearance, potential employees spend a significant amount of time gathering personal information and entering it into an online web-based system. SHARE IMAGE: Download Image: Small (0 KB)| Medium (143.36 KB)| Full Size (1.48 MB) Tags: DOD Photo By: C. Todd Lopez, DOD VIRIN: 190624-D-NU123-003C.JPG Photo Gallery