So you need a new salesperson. You solicit resumes and review them all to find the top candidates. Human Resources may even help you with screening before you call in your top prospects for an interview. You and others in your organization put the candidate through the ropes. You ask them a litany of questions to determine if they can do the job and if they are a good fit for your company. You may even do some psychological or personality testing. Then you make your decision.
For the vast majority of security companies in North America, that’s the process used for hiring salespeople. The problem with this approach is that it is the wrong way to pick great salespeople and it ignores what research says about picking good employees.