Disabling NetworkManager on CentOS 7

Good evening, I am having issues with my clean install CentOS 7 server were I am able to disable NetworkManager but whenever I reboot, I lose network connection. I followed these instructions on the RedHat website and whenever I have done everything and reboot, I am unable to SSH in. I can only then access my CentOS 7 server from inside vmware console. I am requesting someone to troubleshoot the issue and document it for future reference. This should be easy for someone.