Gershon Ben Keren Tactical Survival Instructor

Teaching Self-Protection & Self-Defense

About Gershon Ben Keren

Gershon Ben Keren, is a security professional who trains civilians, law enforcement officers (LEO), private security contractors and military personnel, in tactical survival – a mix of physical and non-physical skills. He is a 5th Degree Black Belt in Krav Maga (the hand-to-hand combat system of the IDF – Israeli Defense Forces), and has worked/performed a number of different roles within the security industry. He has a Master's Degree in Psychology, and has been involved in academic research concerning violence against women. He currently runs Krav Maga Yashir Boston, a 16 000 sq ft dedicated training facility and gym in Boston, MA.

Gershon Ben Keren, began his martial arts training in Judo, at the age of 8, and went on to win regional and national titles in this sport (He holds a 2nd Degree Black Belt in Judo). In 1993 during a visit to Israel, he was introduced to Krav Maga, and his interest in reality-based self-defense began. On returning to the UK, he began training in the system in Liverpool, and later in London, eventually completing the IKMF Instructors Course, run by Eyal Yanilov and Amnon Darsa. On completion of the course, he started teaching, opening the North London Academy of Krav Maga. During his time in London, he taught several courses in effective communication and defensive tactics to various Borough Police Forces of the London Metropolitan Police Force along with programs and training to Her Majesty's Prison Service.

In 2008 he moved to Boston, MA and opened the Boston Academy of Krav Maga. In 2009, he took part in the 27th Dennis Hisardut tournament, and began to train under Dennis Hanover, and in 2011 was inducted in to the Museum of Israeli Martial Arts. As Judo was a fundamental part of Hisardut training, he started to incorporate into the Krav Maga he’d learnt, along with other elements of traditional martial arts training (this was an approach that was common to Krav Maga during its early formation). In 2012, to make the system distinct, and separate it from the “Krav Maga” that was being taught in the US mainly as a fitness workout, he began referring to the system as Krav Maga Yashir.

In 2012, he was approached by Tuttle Publishing to write an introductory book to the approach, and in December 2014, “Krav Maga – Real World Solutions to Real World Violence” was published. The photographs in the book were all shot in real-time, and in the locations where various assaults take place, such as bars, restaurants and ATMs etc. In February 2017, his second book, “Krav Maga – Tactical Survival”, was published.

Gershon Ben Keren’s primary goal is to serve his local community (something he has done in all the locations of his schools). In 2011, he started running free women’s self-defense classes on a Saturday Morning, to make sure that financial constraints would never be a barrier for women to train. This program expanded to incorporate free training in the use of OC/Pepper Spray and in 2014 the course materials were put online and made freely available in the hope that more women would benefit from these resources. In the same year He started to teach free seminars and courses to young women who would be going to College/University for the first time (the course material was also put online).

Gershon Ben Keren, continues to update and revise his training (both academically and professionally), travelling globally to train and teach.


The Timeline below represents some of the significant events that Gershon Ben Keren has recently been involved in - this is by no means an exhaustive list.

  • MWA - Caeserea, Israel

    Gershon Ben Keren, was a guest instructor at the Modern Warrior Alliance 5 day Training Camp, in Israel. He assisted and participated in the grading of a number of Dan Grade (Black Belt) Students. The teaching panel included Yaron Hanover, Guy Rafaeli and Gavriel Schneider

  • 2nd Google Talk

    Gershon Ben Keren was invited back - the first author to do so - to present at one of Google's "Google Talks" at their studio in Cambridge, MA about personal safety and self-defense, focusing on de-escalation and conflict resolution.

  • Krav Maga - Tactical Survival

    February 2017, saw the release of Gershon Ben Keren's 2nd Book, "Krav Maga - Tactical Survival" (Tuttle Press). The book is a follow up to the Amazon Best Selling Book, "Krav Maga - Real World Solutions To Real World Violence' (Tuttle Press). The book concentrates on spontaneous acts of violence, and how to deal with them, using both physical solutions and non-physical ones, such as de-escalation and conflict resolution. Click Here to buy on Amazon.


    Gershon Ben Keren, presented on de-escalation, effective communication and conflict management to LEOs at the December NEMLEC (North East Massachusetts Law Enforcement Council) SWAT/RRT training session.

  • ALICE Active Shooter Course

    Gershon Ben Keren, attended a 2 day ALICE Active Shooter course, that consisted of lectures/presentations and scenario based training on how to train individuals in schools, colleges and businesses to prepare and deal with an active shooter incident.

  • Free Campus Safety Seminar

    This was the third year that we ran our Free Annual Campus Safety Seminar. Rather than just presenting self-defense techniques, the 2 hour seminar looks at the types of violence that female students may face, and how to predict, identify and avoid it. The material covered is also made available at a free website ( that can be accessed by clicking here.

  • Modern Warrior Alliance - South Africa

    Gershon Ben Keren, was a guest instructor at the Modern Warrior Alliance 3 day Training Camp, in South Africa. He assisted and participated in the grading of a number of Dan Grade (Black Belt) Students

  • Boston PD Defensive Tactics

    Gershon Ben Keren was invited down to Boston Police Department's Hyde Park training facility to teach and present, to officers from a variety of departments, unarmed teachniques and solutions for dealing with knife attacks.

  • Cyber Bullying - Boston Globe

    Gershon Ben Keren was interviewed by the Boston Globe about the rise in Cyber-Bullying, particularly amongst young girls. You can read the full article by clicking here. You can also read more about Gershon Ben Keren's work and research concerning school bullying by visiting the website by clicking here

  • Google Talk

    Gershon Ben Keren was invited to present at one of Google's "Google Talks" at their studio in Cambridge, MA about personal safety and self-defense. Previous guest speakers at the Cambridge venue have included President Barak O Bama, and author Salman Rushdie.

  • Krav Maga - Real World Solutions To Real World Violence

    December 2014 saw the release of, "Krav Maga - Real World Solutions To Real World Violence", a unique book that brought Krav Maga out of the studio and into reality. Techniques and solutions were demonstrated in the scenarios and locations where real-life attacks occur e.g. in bars, pubs, restaurants and at ATM's etc. All of the full color photographs were shot at full speed and in real time. None of them were staged as static shots. To purchase the book on Amazon, please click here.

  • 1st Modern Warrior Alliance - South Africa Summit

    Gershon Ben Keren was invited to South Africa to instruct at the first Modern Warrior Alliance. Gershon's contribution was to demonstrate the effectiveness and usefulness of Judo, and the way it can be incorporated into Krav Maga.

  • Free Women's Personal Safety Online

    In 2012, Gershon Ben Keren, started a free women's self-defense program for women in Massachusetts. In 2014, all of the course material was shared online, so that other self-defense instructors could do the same. The website regularly receives around 5000 new visitors every week. To access the material, which includes videos and online surveys (which explain the answers afterwards), please click here.

Resources & Media


Click Cover Image To View On Amazon
Click Cover Image To View On Amazon


Krav Maga Blog

In 2012, Gershon Ben Keren, began writing the weekly "Krav Maga Blog" - depending on what is happening in the world e.g. terrorist events, sexual assualts etc. it is sometimes updated bi-weekly. The blog contains articles on Krav Maga, training methods, scenario based training, decision making under stress, the adrenal dump etc. These are detailed articles rather than 300 word soundbites etc. To read the blog please click here. A selection of the blogs are displayed below (click on the image to read the particular article).


Corporate Safety Training

Corporate Training & Consultancy

Gershon Ben Keren, has provided consultancy and training, in Europe and the U.S. for a large number of businesses and enterprises operating in a wide variety of different industries, sectors and environments.

He has also worked in a consultancy role helping businesses and enterprises, design and implement processes and procedures to mitigate potential risks and dangers to both their employees and other business assets. Please feel free to contact us with your training and consultancy requirements by clicking here.

Speaking Engagements

Speaking Engagements

If you are looking for an interesting, entertaining and informative speaker at your next event, Gershon Ben Keren is able to talk on a a variety of subjects, around personal safety and self-defense.

Whether it's an after dinner event, a lunch time speaking engagment or a corporate team building event, Gershon Ben Keren is able to make his lessons learnt in the security industry, his Krav Maga training in Israel, relevant to your audience. click here to contact us about public speaking events.

News Media

Media & Interviews

Gershon Ben Keren is regularly sought out to provide comment and opinion on news and media channels, including NPR/WBUR (to listen to a past interview with Anthony Brooks, please click here), Fox News and local news channels.

He has also appeared on magazine shows, discussing self-defense and personal safety, and demonstrating techniques and solutions to violence. If you are a Journalist, News Agency or media outlet, that is looking to produce a piece, or write an article, about real-life violence please click here.

Active Shooter Training

Active Shooter Training

If you are a workplace, educational institution, religous or minority organization etc. you are at risk of being targeted as part of an active shooter/killer incident. To learn more about Active Shooter incidents, please visit our active shooter training site by clicking here.

Our active shooter training programs, can be delivered in lecture/presentation format, as well as through scenario-based, hands-on, physical training. To contact us about how we can help you meet your training requirements, please click here.

School Bullying Boston

School Bullying

Gershon Ben Keren, is often asked to present commentary and analysis on school bullying (click here to read a Boston Globe article he was interviewed about concerning Cyber Bullying). If you are looking to learn more about school bullying please visit our training website by clicking here.

Gershon Ben Keren, is available to provide training and consultancy to schools and educational facilities, who are looking to introduce anti-bullying programs. Please click here to contact us regarding your requirements.

Private & Small Group Training In Boston

Private & Small Group Training

If you are an individual or small group who is looking for self-defense, self-protection and personal safety training, beyond that which we offer in our public classes, then please feel free to contact us concerning your requirements by clicking here.

Before contacting us you may want to look at our public classes and training opportunities by visiting and/or

Public Krav Maga Classes

Public Classes

Gershon Ben Keren is the Head Instructor at Krav Maga Yashir Boston (a 16 000 sq ft Krav Maga training facility). He is a hands-on instructor who teaches 90% of the public classes, and is on the mats daily. If you are looking to learn Krav Maga that is not only authentic, but also relevant, please click here to learn more.

Gershon Ben Keren is a 5th Degree Black Belt who was trained and certified in Israel.

Women's Self Defense

Women's Self Defense

In 2011, Gershon Ben Keren started a free women's self-defense program in Boston, teaching self-defense and personal protection to women. This program has run every Saturday morning at 10 AM since. If you live in the Boston area, and would like to attend these sessions please click here.

All of the course material used is available free at, along with our campus safety course, which can be accessed by clicking here

Military, Law Enforcement & Private Security Training

Professional Services

If you are a security contractor, CPO, LEO or similar, or a member of a military unit looking for specific security, self-protection and self-defense training then please contact us with your requirements, and training needs. click here to contact us.

If you are a law enforcement agaency or police force in Massachusetts please contact us about how you can use us as a training resource for your members. click here to contact us.