Peter Southwick is a Senior Network Engineer at Proteus Networks, providing both professional services support and training for Proteus Networks customers. He is a JNCI, holds JNCIE-M #473 and other Juniper certifications in routing and security. He is an author of Telecommunications: a Beginners Guide, co-author of ISDN: Concepts, Facilities and Services (both published by McGraw Hill), and contributing author to The Handbook of Local Area Networks (CRC Press).

Doug Marschke is an engineering graduate from the University of Michigan currently a principal partner at Proteus Networks. He is JNCIE-ER #3, JNCIE-M #41 and JNCIS-FW, JNCIA certified. He is a writer of various Juniper certification exams and co-writer of the JNCIE Enterprise Exam. He has also authored the JUNOS Enterprise Routing book, and coming in 2009, JUNOS Enterprise Switching. Doug currently spends his time working with both service providers and enterprises to optimize their IP networks for better performance, cost and reliability. He has spent the last 6 month working on a next generation government satellite network. He also flies around the world and back sharing his knowledge in a variety of training classes and seminars with topics ranging from troubleshooting, design and certification preparation. If Doug is not on the road, you can find him at his bar in San Francisco, Taco Shop at Underdogs, discussing a wide variety of topics. He has also recently started a new company Funny How Films, producing independent films such as Amsterdam Heavy and Mad Cow.

Harry Reynolds is a senior test engineer in the JUNOS software Core protocols group at Juniper, where he also has worked on courseware and certification offerings. He is CCIE # 4977, and JNCIE # 3, and holds various other industry and teaching certifications. Harry was a contributing author on the Juniper Network Complete Reference (McGraw- Hill, 2002), and wrote the JNCIE and JNCIP Study Guides (Sybex Books 2003).