Security guard is among the toughest jobs in the world, and it is dangerous, no doubt. They have to deal with a wide range of in-the-way-of-harm situations, often without immediate backup. They need to be able to handle stress and keep their composure in situations that would make most people extremely stressed and unable to respond. And they need to be able to do all of this while maintaining a professional attitude.
Security guards are often the first responders in emergency situations. They are the ones who have to deal with potential threats and diffuse difficult situations. This requires a great deal of mental toughness. They need to be able to stay calm under pressure and make quick decisions that can save lives or stop customers or staff from being harmed, or in a situation of conflict, as in a customer who is abusive to a staff member. This mental toughness means being able to think on their feet, take in a situation and smartly / wisely decide what the most helpful response is.
Security guards also need to have excellent communication skills. They need to be able to communicate effectively with both co-workers and the general public. They need to be able to give clear instructions and provide updates in a timely manner. Maintaining their composure when dealing with difficult people or situations is a skill expected in a superior security officer.
The mental toughness of security guards is essential to their job. Without it, they would not be able to effectively help people or respond to threats. It takes a special type of person to be a security guard.