Shareplex restart after reboot; upgrade from RedHat Linux 5 to RedHat 7

Looking for some assistance,  Currently there is a script for auto restart in the /etc/init.d directory in Linux 5.  Upgrading to Linux 7 and  I know that 7 has a different way to restart with the systemctl.  Is there a way to implement the linux 5 startup script to utilize systemctl for Linux 7.