Pakar Pakar Cisco INE

About Our CCIE Instructors and Authors

Brian Dennis has been in the networking industry for more than 24 years, with a focus on Cisco networking for the past 18 years. Brian achieved his first CCIE in Routing & Switching in 1996, and is currently the only ten year CCIE that holds five CCIE certifications. Prior to working with INE, Brian taught and developed CCIE preparation courses for various well known training organizations. Brian not only brings his years of teaching experience to the classroom, but also years of real world enterprise and service provider experience.

Brian Dennis can be reached via email at bdennis@ine.com.


Brian McGahan was one of the youngest engineers in the world to obtain the CCIE, having achieved his first CCIE in Routing & Switching at the age of 20 in 2002. Brian has been teaching and developing CCIE training courses for over 10 years, and has assisted thousands of engineers in obtaining their CCIE certification. When not teaching or developing new products Brian consults with large ISPs and enterprise customers in the midwest region of the United States.

Brian McGahan can be reached via email at bmcgahan@ine.com.


Petr Lapukhov’s IT career began in 1988 with initial focus on computer programming, and progressed into networking with his first exposure to Novell NetWare in 1991. Continuing with Kazan State University’s campus network support and UNIX system administration, he went through the path of becoming a networking consultant, taking part in many network design and deployment projects. Petr currently has over 12 years of experience working with Cisco Systems products, and is the only person in the world to have obtained four CCIEs in under two years, passing each on his first attempt. Petr is an exceptional case in that he has been working with all of the technologies covered in his four CCIE tracks (R&S, Security, SP, and Voice) on a daily basis for many years. Recenly, Petr received his Cisco Certified Design Expert (CCDE) certification, become one of the small group of select people worldwide to have this status. When not actively teaching classes, developing self-paced products Petr can be found as a regular author on INE’s CCIE Blog. Petr currently works as a Senior Network Engineer with Microsoft, and contributes part time here at INE.

Petr can be reached via email at petr@ine.com.


Mark Snow has been actively working with data and traditional telephony as a Network Consulting Engineer since 1995, and has been working with Cisco routers and voice-over technology since 1998. Mark has been teaching and developing content for the CCIE Voice track since 2005, and the Security track since 2007. Mark’s story with both data and voice technology started out quite young, as he began learning around the age of five from his father who was a patented inventor and a research scientist at AT&T Bell Laboratories. Mark started out on Unix System V and basic analog telephony, and went on from there to large data networking projects with technologies such as Banyan Vines, IPX and of course, TCP-IP, and large phone systems such as Nortel 61c, Tadiran Coral, Avaya Definity and of course Cisco Unified Communications Manager in both enterprise and 911 PSAP environments across the US and abroad. You will find Mark Snow in all of the Voice self-paced content as well as all live classroom instruction classes here at INE.

Mark Snow can be reached via email at msnow@ine.com.

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