William Aprill
Modern Defensive Training Systems

MDTS Training

MDTS is a New York based firearms training and personal protection consulting company. We specialize in pistol, concealed carry, shotgun, carbine, defensive knife, less lethal, physical defense and threat awareness training courses. Mobile training courses are available in N.Y. and abroad. Contact us to host a training course at your range or location. Click logo below to see schedule of classes near you.

William Aprill

William Aprill – Co-Instructor for Specialized Courses

William Aprill is a licensed mental health professional with over 15 years experience across the continuum of care. He presently maintains a private practice and consultancy specializing in post-traumatic interventions and other disciplines.

William is a former deputy sheriff (Orleans Parish, LA, Criminal Sheriff’s Office) and Special Deputy US Marshal (Eastern District of Louisiana). He is a decorated competitive shooter and has taught civilian, law enforcement, and military personnel in various fighting skills since 1990. He maintains an active schedule both as student and teacher, having been instructor-rated by several top-tier trainers and studying under many of the most influential members of the combative arts community.

Through his company Aprill Risk Consulting, William has presented his material on violent criminals and their decision-making, defensive incident aftermath, mindset development and defensive preparedness locally and nationally, including at the Annual Conference  of the International Association of Law Enforcement Firearms Instructors (IALEFI), Rangemaster Tactical Conference, Tactical Response Alumni Weekend, and at Paul-E-Palooza, the memorial conference and fundraiser for the family of the late Paul Gomez.

William has been a popular guest on the firearms/training industry broadcast Ballistic Radio, and in 2014 Personal Defense Network will be releasing 2 DVDs of his training blocks on defensive decision-making and mindset development.


Ballistic Radio Interview with William Aprill – 2/16/14 

Ballistic Radio Interview with William Aprill – 7/14/13


Contact: wtaprill@yahoo.com

11 Responses

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  3. […] and make his approach stand out. I recommend the book “The Gift of Fear” as well as William Aprill’s lectures on violent criminal actors for some glimpse into the minds we are trying to […]

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