I am currently doing parttime job in different company, related to IT Job, when there are problems, I solve them online.
Shift the unmanage switch to manageable (Cisco) Switch and create a separate network trough VLAN.
Connect all branches with head office.
Dynamic Host Configuration Protocol (DHCP) deployment Windows Server 2012 R2 firewall Configuration.
Desigen infrastructure all network of head office and Branches.
configure wireless access point configuration.