Hi!
What network equipment (routers in particular) do you use in both locations? If they support any of Site-to-Site VPN technology, we can easily connect them together. It's also important to have a static public IP address at least on one end of the tunnel. Another requirement is to have non-overlapping network ranges in the offices.
I have a lot of experience in configuring different types of VPNs on a various range of network appliances from major vendors, as well as on virtual or bare-metal servers and major cloud providers, so if you provide more information about your current setup I could give some recommendations with details to be discussed later.
Looking forward to working with you!
Best regards,
Vitaly