
Did you see me in The Simpsons episode about wireless networking?
I am a Principal Technologist with Xirrus. I have over ten years experience in wireless networking, security, and audit. I started my career as an Intelligence Officer with the United States Air Force where I held various positions including Deputy Branch Chief at the Air Force Information Warfare Center and Chief of Intelligence Systems at a fighter wing. As a Principal Technologist, I now serve a wide variety of Fortune 500 clients as well as top K-12 and Higher Education Institutions.
I hold a B.S. from Vanderbilt University where I majored in Physics. I also earned a M.S. from the University of LaVerne with a concentration in Business and Organizational Management.
I hold over a dozen ITÂ and wireless certifications to include:
- CISSP (Certified Information Systems Security Professional)
- CISA (Certified Information Systems Auditor)
- CISM (Certified Information Systems Manager)
- PMP (Project Management Professional)
- CWNE (Certified Wireless Network Expert)
- CWAP (Certified Wireless Analysis Professional)
- CWSP (Certified Wireless Security Professional)
- CWNA (Certified Wireless Network Administrator)
- Wireless# (CWNP Wireless# Certified)
- GAWN (GIAC Assessing and Securing Wireless Networks)
- GCWN (GIAC Securing Windows)
- RFID+ (CompTIA RFID+ Certified)
- Security+ (CompTIA Security+ Certified)
I am a SANS Stay Sharp Instructor, a SANS Certified Mentor, and a frequent speaker on wireless technologies at industry events, professional organization meetings, and universities.


3 comments
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June 9, 2010 at 5:55 am
VIV DEE
Hiya.Im a 35 year old man who is currently about to study the CWNA WIRELESS CERTIFICATION.
Im doing this on a low budget, and self study is the only option.
can you please reccomend the best books and materials to buy given a low budget, or put it anyone way, whats the best way of studying the CWNA if you have a budget of about 300 dollars or pounds
Could you please reccomend a strategy
Viv EMAIL. VIVDEEWILLAMS @MAIL.COM
PS: Are the transignal DVDS worth buying
June 10, 2010 at 7:07 am
Timothy Douglas
http://blogs.computerworld.com/16292/apple_wwdc_highlights_need_for_wireless_capacity#comment-196548
From your recent post on WWDC and the WiFi issues that Jobs had, I don’t follow the statements:
“The Wi-Fi radio in the iPhone (3G, 3GS, and 4G) is only capable of operating in the 2.4 GHz spectrum, so Apple would want to encourage as many users to utilize the 5 GHz spectrum as possible.
How should they encourage users to utilize the 5 GHz spectrum? It sounds obvious, but provide plenty of 5 GHz access points. The clients (laptops, phones, tablets, etc.) make the decision of which AP they want to connect to. They make this decision on a number of factors to include signal strength and signal quality. If you provide a relatively high number of 5 GHz APs, clients will migrate to them.”
If, as you indicate, the iPhone only works in the 2.4Ghz range, how could Apple encourage users to use the 5Ghz range? The same question would be for any OTHER user that uses B/G. Does N operate in the 5Ghz? Maybe I don’t know enough about the operating range of N. Also, as with 802.11a, it operates in the 5Ghz range but has much less penetration ability and, in turn, requires additional access points.
Do you have any sort of whitepaper that talks about how to set up multiple access points for seemless movement / transition between then in a larger, in-door environment?
Would appreciate anything you might have on this.
Thanks.
Alternate email address: deadonit1967@gmail.com
August 13, 2010 at 11:08 am
Melanie Yarbrough
Hi Douglas,
I’m the assistant community editor over at ITKnowledgeExchange, and I found your blog through your Twitter link. This month we’re covering all things on wireless networking, and I was wondering if you’d be interested in writing a guest blog post for us. We’d love to have you! If you’re interested or have any questions, please email me at Melanie [at] ITKnowledgeExchange [dot] com.
I look forward to hearing from you!
Melanie