If you own a business then it will be your job to consider the security, you may pass this responsibility on to an employee or you may choose to outsource your security to a security firm if you do not want to do it yourself. Outsourcing to a security firm will often give you the most peace of mind and can be the best way to keep your equipment and staff secure but can be expensive. Depending on what type of business you run and how much money you keep on site will help you decide on what level of security you need.
If you are running a bank or a finance company that keeps large amounts of money or personal data on site then your security needs to be high. Personal data can be as valuable as money, if not more so and if this gets compromised then you also run the risk of losing many of your customers too.
As standard all businesses should have CCTV systems or intruded alarms as a minimum. If storing secure data on site, then you should make sure that any servers that hold this information are not only physically secured away but also secured from hackers etc.