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September 16, 2015 - LMG will teach "Digital First Responder Training" at our World Headquarters in Missoula, MT. Sign up now!

September 22, 2015 - LMG will teach "Digital First Responder Training" in Billings, MT. Sign up now!


Congratulations to all the teams that participated in the Network Forensics Puzzle Contest at DEF CON 23! View contest results, hints, and passwords here.

We're pleased to announced that Network Forensics Puzzle DVDs from 2011, 2012, and 2014 are all available on BytePuzzles!

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Our Team

Please browse the list below for biographies of selected members of LMG's consulting team.

Sherri E. Davidoff
MIT 2003, GCFA and GPEN-certified

Sherri Davidoff is a founder of LMG Security and the co-author of "Network Forensics: Tracking Hackers Through Cyberspace" (Prentice Hall, 2012). She has over fourteen years of experience as a cyber security professional, specializing in digital forensics, security awareness training, penetration testing and web security assessments. Sherri has authored courses for the SANS Institute and Black Hat, and conducted onsite security training for the Department of Defense, Google, Comcast, Los Alamos National Laboratories, and many other organizations. Sherri is adjunct faculty in both the School of Business and the Computer Science Department at the University of Montana, where she teaches cybersecurity classes. She is a GIAC-certified forensic analyst (GCFA) and penetration tester (GPEN), and holds her degree in Computer Science and Electrical Engineering from MIT.

Karen Sprenger
Director of Operations, GCFE-certified

Karen Sprenger is the Director of Operations at LMG Security. She has over 20 years of experience in information technology, most recently serving as Director of Technology for Billings Public Schools, where she was responsible for securing and supporting 18,000 users, 8,500 computers, 5,000 mobile devices, 2,000 telephones, 50 miles of network, and one very temperamental vending machine. A true geek, she considers "digital forensics" a perfectly acceptable answer to the question, “But what do you do for fun?” Karen is President and a founding member of the Montana High Tech Crime Investigation Association (HTCIA) and is a GIAC-certified forensic examiner (GCFE).

Tom Mullins
Director of Business Development

Tom Mullins is the Director of Business Development at LMG Security. He has over 25 years of professional experience in the public sector and education technology marketspace, and has provided implemetation and consulting services for hundreds of large, high-profile education clients. Tom maintains extensive knowledge of current cyber security market conditions. He has authored and presented many training courses and seminars, including "Operations Best Practices" and "Cost Saving Gains Through Efficient Operations." He holds a degree in Business Management/Information Systems from the Montana State University.