About Us

Cannonball Defense is a veteran owned business that focuses on self-defense training, concealed carry permits, and cyber security.  Don’t be a victim!  Protect yourself and family from personal harm. Protect your small business from cyber threats.

gerhardt bobzien

Owner & Trainer: Gerhardt Bobzien

Experience:  Specialized training, certifications, and education to support each class and services  offered.  Twenty plus years of military experience including “Enduring Freedom,” and “Operation Desert Storm.” Two important skills taught and developed during my tour of service are leadership and the ability to make mindful, strategic, and quick decisions.   I enjoy teaching, encourage self-advocacy, and support the second amendment.


  • UW-Milwaukee, Bachelor’s, Information Science Technology
  • MATC-Milwaukee, Associates, IT Networking
  • Excelsior College, Associates, Electronics

Other Interests:  Hunting, Fishing, Cycling, Mechanics, Electronics, Shooting, and spending time with family.

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Clubs:  Active gun club member

Class Certifications:  National Rifle Association Certified Instructor for:  “Refuse to be a Victim,” “Basic Pistol,” and “Personal Protection in the Home.”

Most recent Community Service: 

Volunteer Safety Instructor, Wisconsin Department of Natural Resources (DNR) 2015. Supported the education of safe practices of children and adults while hunting in the Wisconsin. Promotes the ethical and safe hunting practices prescribed by the Wi DNR. Certification as a volunteer instructor is both an honor and a privilege.

GBobzien@CannonBallDefense.com or 414-322-8856


cannonball defense wisconsin