How could i build up a separated LAN connection with a big company?

Hello , you can use from VPN ( virtual private network ) for use with another network in your place (if you have a long distance with your company destination ) . But If company destination is near to your place you have2 way for run that network .1- you can use wireless network devices look like point to point connection .2- use the routers look like mikrotik routers and make a another network and have wired connection . ( safe )