Work Experience

President and CTO, Five Directions, Inc.

October 2012 - present

Associate Professor, Dept. of Computer Science, University of Maryland, College Park

Summer 2000 - Oct 2012 (sabbatical and leave of absence 2006-2009)

Principal Architect, Microsoft, Redmond, WA.

March 2008 - March 2009

President and CTO, Komoku, Inc.

October 2005 - March 2008

Senior Technical Advisor (GG-15), National Security Agency

1990 - 2000

Senior Software Engineer, Office of the Chief of Staff, US Army, Pentagon

1987 - 1990

Area Signal Node Platoon Leader, Second Infantry Division, US Army, South Korea

1986 - 1987

US Patents

7,929,948 Method for fast roaming in a wireless network, April 19, 2011

7,756,510 Authentication method for wireless distributed system, July 13, 2010

7,421,268 Method for fast roaming in a wireless network, September 2, 2008

7,400,604 Probing method for fast handoff in WLAN, July 15, 2008

7,263,357 Method for fast roaming in a wireless network, August 28, 2007

6,185,678 Secure and Reliable bootstrap architecture, February 6, 2001

External Activities

Trusted Computing Academic Advisory Board (TCAAB), Microsoft, 2010 - Present.

Information Science and Technology Study Group (ISAT), DARPA, 2004 - 2007.

University of Maryland Sailing team, Faculty Advisor, 2009 - 2011.