Many security jobs will require teamwork, such as if you are working a role where event work is needed. The interviewer would like to know that you are helpful, communicative, positive, and goal-oriented; all qualities required to work well in a team environment. If you have some work experience, take the time to talk about when you have worked closely alongside others. Discuss what your collective goal was and how you contributed to reaching that goal. If you are new to your career, you can offer up a similar example from your post-secondary, high school, volunteer, or team sports experience.
"I have worked in teams with the size of the team depending entirely on the size of security project at hand. The largest was a concert that I worked on contract, with over 20,000 attendees. This show required security professionals with all different backgrounds. We all had different ideas and areas of expertise which could have become a problem; however, it ran remarkably smooth. We each communicated our area of strength and levels of comfortability with each task. The team leader assigned us our posts, and we all worked equally as hard to ensure a safe space and fun experience for every attendee."
"I have worked in teams and group environments both in a sports setting and while in school. As the team captain of my schools' football team, I made sure to communicate with my team by encouraging their strengths. I would push them to give their best before every practice and game; praising their efforts when they would push themselves physically. While working group projects, I would lean on spreadsheets and other cloud-based tools to ensure the projects were on track and everyone knew what they were to be working on. I will apply these same leadership and communication techniques to this role."