Doctor Nicholas Allen Walling founded Defense Concepts, Inc. in March of 2002.  He then retired from the Henderson Police Department on July 3, 2003. In 20 years of service he has enjoyed a three-year tour of duty in the Patrol Bureau, two years with Investigations and the remainder with the Training Bureau, serving two years as its manager. He holds Basic, Intermediate, Advanced and Management certifications from Nevada P.O.S.T. as well as an Intermediate Instructor and Firearms Instructor Trainer certification.

He has a 4th Degree Black Belt in American Kenpo Karate and holds an adjunct instructor position at Dan Hurd's Academy of Martial Arts in Henderson, Nevada.

 Nick obtained his Associate's Degree in Automotive Technology from Sierra College in Rocklin, California in 1975. At the University of Nevada at Las Vegas he earned his Bachelor's Degree in Post Secondary and Adult Education in 1997, his Master's Degree in Workforce Education in 2000, and his Doctoral Degree in Educational Leadership.

He holds lifetime teaching credentials in Vocational Education from California State University in Sacramento and has taught various Vocational Education programs for Sierra College in Rocklin, California, for the Sacramento County Office of Education in Sacramento, California, and for the College of Southern Nevada in Las Vegas, Nevada.

He also holds the prestigious CPP certification from the American Society of Industrial Security International.

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