Kore Defense Industries LLP

Kore Self Defense is Kore Defense Industries’ physical training center located in Loudoun County, Virginia providing self-defense training built from a Krav Maga Curriculum originally developed by Eyal Yanilov. Building from this foundation, our curriculum is fueled by continuous research in the evolution of conflict and violence in the post-modern world. Unlike other Krav Maga based programs, our goals are not based on a systemic martial arts paradigm. We focus instead on what is relevant to our students now – today.

Krav Maga & Chiron Training

Krav Maga is our “hardware” and reality based self-defense is our “software”. Our Program Developer & Owner works collaboratively with Chiron Training & the International Violence Dynamics Team to keep our principle based self-defense training program relevant, effective, and current. Once certified, our instructors are required to continue their training; keeping their physical and instructional skills current. Like Karate, Brazilian Jiu Jitsu, and other martial arts, students can train and test for ranks designated by patches as a nod to our military history.

Before you step on the mat,
we encourage you to meet our team.


Tammy Yard-MacCracken
Tammy Yard-MacCrackenFounder - Psy.D. LPC - Founder Kore Self Defense
Dr. Tammy McCracken is the Founder of Kore Self Defense and the Global Solutions Director of Personal Defense Industries (PDI). She is a certified Conflict Communication Instructor and is one of four directors with Rory Miller’s Chiron Training. Her training programs have been sought out by safety and security professionals, members of law enforcement, first responders (EMS), and national security professionals.
Steve Fisher
Steve FisherOwner/Head Instructor Kore Self Defense
Steve Fisher is one of the owners of Kore Defense Industries (KDI) and is the Head Instructor for Kore Self-Defense. He is also a certified instructor through 500 Rising, and a Level 3 Coach through the Muay Thai University. His martial art background includes BJJ, Judo, and Muay Thai.
Kevin Bosman
Kevin BosmanOwner/Instructor Kore Self Defense
Kevin Bosman is one of the owners of Kore Defense Industries (KDI) and is an Instructor for Kore Self-Defense.

Kevin joined Kore in October 2016 while he was attending NOVA Community College to get certified as an EMT. Aside from his years training in Krav Maga, Kevin’s martial arts experience also includes Karate, Boxing, Hapkido, with some exposure to the worlds of BJJ and Muay Thai as well. Kevin was certified as an instructor under our founder Tammy Yard-McCracken in October of 2023. Kevin is also certified as a Level 1 Coach under Master Buck Grant’s Muay Thai University.

In May of 2022, Kevin was certified by the DCJS for armed/unarmed private security and currently works as a Security Officer in Ashburn, VA.

Alyssa Walsh
Alyssa WalshOwner/Instructor Kore Self Defense
Alyssa Walsh is one of the owners of Kore Defense Industries (KDI) and is an Instructor for Kore Self-Defense.


Mikayla Rodarte
Mikayla RodarteLead Instructor Kore Warriors
Bio coming soon!
Jacob Shepard
Jacob ShepardCertified Instructor
Jacob joined the instructor team the Fall of 2020 earning his full instructor certification after nearly 24 months of work to the achievement. His dedication and commitment to excellence reflects his ability to provide insightful direction to students working on the mat. He brings with him 10 years of training experience in Krav Maga & Self-Defense.
He currently works as an analyst for the Federal Government, and previously functioned as a background investigator for persons seeking security clearances. His background in psychology includes studies in both forensic and legal psychology with experience working with individuals charged with domestic and/or sexual violence.
Amy Maxwell
Amy MaxwellCertified Instructor
Amy Maxwell’s original certification as a Krav Maga instructor was granted by Krav Maga Global. She has continued her education as an instructor with extensive training in other fighting systems and is currently certified by Kore Self-Defense’s Instructor College.
Amy began training at Kore Krav Maga in our first 6 months of operation and has been an integral element in our efforts to increase the number of female instructors here in the area & in the U.S. She utilizes her understanding of goal development and what it takes to accomplish difficult tasks in her work with students on the mat.
Sophie Fisher
Sophie FisherAssistant Instructor
Sophie started at Kore in February 2019 when she was in 7th grade. Before coming to Kore, she had struggled with anxiety and other issues, but Kore quickly became “family” for her. She now had a positive outlet to deal with the negative energy she was dealing with.

Kore Defense Industries Instructor College


Our Instructor College is open to qualified, enrolled Kore Self-Defense Students. Becoming a certified instructor requires commitment, technical proficiency in the physical skills, and academic competency in self-defense instruction. Instructor certification is an apprentice/internship process with periodic assessment toward final credentialing.



Achieve Your Goals

Flexible membership packages to suit all levels of training to help achieve your self defense goals