The need for security is not something that will ever go away. This means that if you are a trained security guard, you will always be safe in the knowledge that you can find some form of work. If you are well trained, skilled, and good at what you do, then it is perfectly possible for you to find good jobs.
One of the easiest ways to find work is through an agency that hires out security guards and security personnel. They may find you work at events, manning car parks, working in a commercial premises or monitoring cctv footage. There are many different opportunities to find work in various sectors.
Send a CV to a security agency detailing your experience, or make direct contact with them to see if they are hiring. You will be able to find some great positions and work flexibly to suit you and your family.