Required software development freelancer for Network engineer/Solution Architect required job

I am owner of startup online travel agency. I have two types of applications,

1. External website called flight booking engine and built in ASP.Net with back end in SQL Server
   
2. Internal applications used by 1 to 10 employees via LAN
   
   • CRM - Microsoft Access/SQL Server
     
   • File Server
     
   • Telephony software connected with PBX for agents to make inbound and outbound calls

I am looking for a system engineer who can help me to design infrastructure. To apply for this job, you shall have good understanding of computer networking, firewalls, security. Knowledge of telephony system.
Happy biddings.

Skills & Expertise Required

software development