Mark Hanczaruk has over 10 years of experience in networking and VOIP engineering. He has extensive expertise in designing and implementing Microsoft Lync and Cisco VOIP solutions for organizations ranging from 25 to over 100,000 users. Some of his responsibilities include architecture design, hands-on implementation, troubleshooting, and acting as a consultant. He also has skills in Cisco routing, firewalls, and other network technologies.