About the Authors

Charles A. “Chuck” Sennewald, CPP, CSC, CPO, the author of numerous ButterworthHeinemann security titles, is a Certified Security Consultant (CSC) and a former Certified Management Consultant (CMC). Chuck commenced his long career upon graduating from the Army’s Military Police School in Georgia in 1949. He served as a military policeman in the Korean War. He was a deputy sheriff with the Los Angeles Country Sheriff’s Department, Chief of Campus Security with the Claremont Colleges, and was with the Broadway Department Stores for 18 years, concluding his service there as Director of Security. He subsequently started his own consulting practice in 1979. In the 1980s he was appointed as the Security Industry Representative of the U.S. Department of Commerce, serving in Sweden, Denmark, Taiwan, Hong Kong, and Japan. Chuck has published 14 books including Effective Security Management, now in its fourth edition, The Process of Investigation, now in its third edition, Shoplifting and Shoplifting: Managing the Problem, co-authored with John Christman, Security Consulting (also in its third edition) and Shoplifters vs. Retailers, The Rights of Both. He founded, and was the first president of, the International Association of Professional Security Consultants (IAPSC). Chuck holds a BS Degree in Police Science and Administration from California State University at Los Angeles, where he subsequently taught on a part-time basis for 13 years. In 2006 Security Magazine identified him as one of the country’s “25 Most Influential Security Executives.”

John H. Christman, CPP, retired in 1994 after 22 years as Vice President and Director of Security for Macy’s West, where he directed a staff of over 500 security personnel in some 60 stores and facilities in various states west of the Mississippi. After retiring, he began his practice as a security management consultant specializing in expert witness assignments in the retail venue, serving clients from coast to coast. He has over 40 years’ work experience in security, law enforcement and intelligence.

John graduated from Muhlenberg College and attended the University of Pennsylvania Law School. During and after the Korean War he served as a special agent of two federal intelligence/investigative agencies, and is a retired Commander (Intelligence), U.S. Naval Reserve.

Prior to joining Macy’s, Mr. Christman worked as a security executive in regional supermarket and drug store companies. He is an honor graduate of the Los Angeles County Sheriff’s Academy, and member of the International Association of Professional Security Consultants and ASIS, having been granted lifetime status as a Certified Protection Professional. John has co-authored two books with Chuck Sennewald—Shoplifting (1992) and Shoplifting: Managing the Problem (2006), as well as contributing articles to numerous security-related publications. He served for twelve years on the Board of Directors of the National Retail Federation’s Loss Prevention Group, and has taught security courses at the college level. In 2007 he was inducted into the NRF’s Loss Prevention Ring of Excellence.

Currently, John is semi-retired, accepting only assignments which involve unique and/or high profile/value cases.