Penetration testing involves performing various reconnaissance scans against perimeter defenses, boundary routers, firewalls, switches, network devices, servers and workstations. Assembling the results of those tests will allow you to see vulnerabilities, and then look at an attack vector to try and penetrate identified systems to see if they can be compromised by using known vulnerability scans, attacks and denial of service attacks. Stealth Worker, a marketplace for cybersecurity talent, aims to address the staggering shortfall for most companies looking to hire, calling themselves the Uber of cybersecurity.”]
Source: https://www.csoonline.com/article/3028535/how-to-be-or-find-a-skilled-pen-tester.html