What is your greatest weakness as a security professional and what are you doing to improve?

Focus on a weakness related to your profession, but not one that is an essential job duty. For example, suppose you say your weakness is your lack of patience. In that case, the interviewer may pass you over for another candidate since that skill is an essential part of being an excellent security professional.

"My greatest weakness is my lack of knowledge of using firearms. I understand it is not required for this position, but there are some other positions you offer that I am interested in where handguns are required for the job. I signed up for a firearms safety course that starts next week. Once I complete the course, I will buy a handgun and practice weekly at the shooting range."

"My greatest weakness is my lack of experience in this field. I am improving this weakness by applying for this position. I just graduated college and received my bachelor's degree, and my goal is to get chosen for the position to start gaining hands-on experience. I am a quick learner, and you will not be disappointed in my performance if hired for the position."