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Hiam "Chiam" Naiditch - President


Chiam Naiditch is the founding member of MAGEN Chicago. Chiam has a strong passion for training and holds 7 FAA Flight Instructor Certificates.


In his former career as a Commercial Airline Pilot, Chiam's experience as a Chief Flight Instructor, Chief Pilot, and Member of the FAA Safety Team (FAAST) helped shape his commitment to safety, training, and education.


Chiam is an Illinois State Police Concealed Carry Firearms Instructor and has the State Original Firearms Training License and the Unarmed Security Guard Certification. He is also an NRA Certified Pistol and Rifle Instructor, Range Safety Officer and Chief Range Safety Officer, a CERT (Community Emergency Response Team) member, and a graduate of the Skokie Citizens Police Academy.

Chiam has adopted the aviation motto of continuous learning and incorporates this into MAGEN Chicago's training philosophy. 


Yossi Miller is a Jewish community leader and business owner from Chicago, Illinois. Born in Israel, Miller moved to the United States as a child and grew up in West Rogers Park. He has been active in the Sephardic community in Chicago and has held leadership roles in several Jewish organizations. Miller is currently the president of the Hebrew Persian Congregation in Skokie as well as Head of Security. In addition to his community involvement, Miller also runs a family business in downtown Chicago.

Yossi Miller- Treasurer


Shneur Osmunson - Secretary 

Shneor is an active member in the Chicago community and is very passionate about helping and assisting others. He is also active in his Shuls Safety Team.  

Dove Dukes -IT Director

Dove has been immersed in the world of technology and innovation since he started modifying computer games at the age of 10 and is always glad to share his expertise and lend a hand. He lives with his family in Chicago and develops mobile apps for, the world’s largest and first Judaism website.

Avi Levin -Coordinator

Avi is an expert sound engineer and the owner of his own construction company. He is a gabbai at Khal Chasidim as well as the shul's Head of Security. By day, he is overseeing home renovations. By night, he works tirelessly to bring simchas to the next level with sound and lighting. But his devotion to the community is 24/7. He has extensive training in public safety and search and rescue and will be the first to help in anyone's time of need.


Dr. Martin “Yossi” Borenstein 

Medical Training Director 


Dr. Borenstein holds a BS in Computer Science and Biology. He graduated from Chicago Medical School in Illinois and practices pediatric medicine at Kids First Pediatrics in Skokie. He is a Fellow of the American Academy of Pediatrics, is a Certified NRA Range Safety Officer, and is a Certified "Stop the Bleed Instructor."  


"I believe Magen Chicago is performing essential work to ensure the safety of the Jewish community and its institutions. Being selected as the director of medical training is indeed an honor. With the "Stop the Bleed" program, Basic Life Support, BLS, and defibrillators, I intend for as many members of the Jewish community as possible to be trained and competent in the techniques for dealing with major trauma. I intend to develop a more intensive program for SSOs and SGOs, which will incorporate the use of cutting-edge computerized manikins in dealing with trauma."


Leah Kerendian – CPR/AED and Stop the Bleed Instructor


Pete Milionis

Chief Instructor​


Petros is a U.S. Army veteran and recently retired Chicago Police Officer with more than 15-years of experience, including serving as the primary firearms/carbine instructor for the S.W.A.T. team for the past 10-years. Milionis is also a full-time operational member of the team, serving as an element leader in the execution of Hostage Rescue/Barricaded Subjects and High-Risk Search Warrants. including the Narcotics High-Risk Entry Team, Fugitive Apprehension Unit, School Unit, Airport Detail, and the Marine Unit.

Petros has presented at numerous tactical conferences and has trained S.W.A.T. Teams across the U.S. He has worked as a firearms instructor for one of the largest U.S. private military contractor organizations training civilians through special operation personnel.


He has also served as a subject matter expert and lead instructor for the U.S. State Department Anti-Terrorism Assistance Program in the training of high threat protection details responsible for the protection of national leaders overseas. 

Petros has been competitive in U.S.P.C.A. earning the classification of Grandmaster. He has been the recipient of numerous championship titles, including 4-time Steel Challenge IDPA World Champion, 2-time Steel Challenge IDPA National Champion, as well as High Law Enforcement USPSA National Champion.


Daniel J. Lombard

Guest Instructor

​​Daniel served as a Police Officer in South Africa and was actively involved with firearms training both for civilians and law enforcement. As a competitor in national International Practical Shooting Confederation (IPSC) shooting competitions, he achieved the distinguished honor of provincial colors for Natal. Daniel continued his law enforcement career when he emigrated to the United States and joined the Chicago Police Department where he is and has been serving for over 12 years; nine of which were spent on the Gang Unit where he was responsible for the planning and execution for over 100 high-risk search warrants.


Daniel is a graduate firearms instructor from the United States Secret Service Academy and has been an assistant instructor with Spartan Tactical Training Group as well as the Hollow Training Center. He has presented training programs with the International Association of Law Enforcement Firearms Instructors (IALEFI) as well as the International Law Enforcement Educators and Trainers Association (ILEETA) and the Alabama Tactical Officers Association (ATOA).


Additionally, Daniel is a consultant for DS Arms where he is active in product development and is responsible for product presentations and demonstrations at foreign military shows.


Chiam Naiditch


Chiam is an Illinois State Police Concealed Carry Firearms Instructor, has the State Original Firearms Training License and the Unarmed Security Guard Certification. He is also an NRA Certified Pistol and Rifle Instructor as well as Chief Range Safety Officer and an RSO, a CERT (Community Emergency Response Team) member, and a graduate of the Skokie Citizens Police Academy. Stop The Bleed and CPR/AED Certified.


Michael W.


​Michael has a passion for safety, teaching, and his community.  He is a member and RSO at the ISRA range in Kankakee.  He has trained under numerous national instructors including Massad Ayoob, Rob Pincus, Chuck Haggard, and Scott “Jedi” Jedlinski, as well as many other regional and local instructors.  He is a certified NRA pistol instructor and RSO.  He has TCCC (TECC), first aid, and CPR certifications and is a certified Glock Armorer. He is a committed 2A supporter and has life memberships in NRA, ISRA, SAF, and CCRBA.


Eli Greenberg Z"L

Eli has been a member of MAGEN Chicago since its founding. He was the driving force behind the organization and was always willing to assist with any event or member in need. Eli exemplified the true ideal of  a "Mentch." We will truly miss Eli's irreplaceable smile and charisma. 


Sergio Macia
Men's Krav Maga Instructor

A true extrovert and a forever optimist, Sergio first began his training in martial arts when he came to Chicago from his native Mexico City in 1994. It was in hapkido school where he developed his love of martial arts and it was in high school where his love of training and encouraging people began as he prepped and coached fellow students for school talent shows. Since then, Sergio has continuously perfected his ability to transfer knowledge to anybody. 

Sergio began his career at Ultimate Martial Arts as a Krav Maga student in 2012. Having excelled as a student, Sergio was selected to become a coach and trainer in 2013 and has subsequently gone through numerous (and rigorous!) training programs. He is a certified Krav Maga Fit to Fight instructor, IDS instructor as well as TRX and Heavy Bag Blast instructor. Sergio is also certified in CPR/AED.  


Leslie Lefranc

Women's Krav Maga Instructor


Leslie was certified full IKMA Gidon system Krav Maga instructor in 2012 under US Chief Instructor & 3rd Degree Black Belt, Israeli Krav Maga David Khan. She trained with Israeli Master such as Master Yigal Arbiv for long hours and took many Seminars worldwide to hone her skills. She certified for the women-empowered pink belt at the Gracie Academy in Torrance, California, with Rener and Ryron Gracie.

She teaches important advice, strategies, and techniques that can save lives. Over the years, she had boiled down a curriculum to a complete array of useful tools. Because the Krav Maga system is well-integrated, common defensive principles apply to various attack scenarios. Thus, the system can be learned in a relatively short period of instruction. Leslie's motivation is her dedication to empowering all women of all communities and backgrounds. 

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