Try this (remembers to set correct IP and MAC):
1) create file '/etc/init.d/eth0' and set execute rights to it (555 are fine):
#!/bin/sh
HWADDR='fe:fe:fe:fe:xx:xx'
IP='10.10.xx.xxx'
NETMASK='255.255.255.0'
ifconfig eth0 hw ether $HWADDR
ifconfig eth0 $IP netmask $NETMASK up
2) create file '/usr/lib/systemd/system/eth0-setup.service':
[Unit]
Description=Configure MAC on eth0 interface
DefaultDependencies=no
Before=net-config.service
[Service]
Type=simple
ExecStart=/etc/init.d/eth0
[Install]
WantedBy=network.target
3) Verify: run first script and see if eth0 is up and running as you need. Restart and see if it was configured on boot.