Michael Ciulei has more than 11 years of experience in the IT field, as an IT and Telephony Specialist, with a focus on network design and implementation. He is currently a Cisco CCNP Voice Engineer, with a specialization in Advanced Wireless LAN. He has a Bachelor of Engineering degree in Informatics and Computer Science from Tibiscus University, Timisoara.

John Schreiner is a Captain in the United States Marine Corps and the Lead Voice Instructor and Curriculum Manager for the Communication Training Centers. He serves as the Director for Communication Training Center-2, training marines on the East Coast the latest commercial technologies (Cisco, Microsoft, REDCOM, Harris, and so on). He has experience with both military tactical voice systems and commercial voice systems. He also instructs on security and advanced networking.

John holds CCNP, CCNP Voice, CCNA Security, CCDA, CISSP, and various other certifications.

Victor M. Rosa has been in the computer industry for over 25 years. He is experienced in the design and implementation of large IP and multiprotocol networks, encompassing complex wide area network designs, campus local area networks, IP Telephony and Data Center technologies. In the past 10 years, he has planned, implemented, and supported many networks, utilizing both Layer 2 and Layer 3 techniques. In the past five years, he has worked with companies such as HP, Bank of America, and Cisco Systems. He is currently a Networking Consultant for the largest privately owned enterprise in South Carolina, serving the health care industry, pharmaceuticals, and state government agencies. He is certified in two major network technologies: Microsoft and Cisco in the area of Cisco IP Telephony, holding a CCNP Voice and is currently pursuing a CCIE in Routing and Switching.