Preston Martinek

Preston Martinek is an experienced security training professional currently serving as a Senior Security Training Supervisor at Holtec International since May 2024. Previously, Preston held several roles at Entergy from October 2011 to May 2024, including Security Training Supervisor and Security Operations Supervisor, focusing on protecting the public from potential radiological sabotage. Prior experience includes positions as an Associate Training Instructor at American Electric Power, a Security Training Instructor at Wackenhut, and a Training Instructor at Securitas, all dedicated to training Armed Security Officers in safeguarding against radiological threats. Early in the career, Preston served as a Range Coach and Marksmanship Instructor in the United States Marine Corps, where training revolved around marksmanship fundamentals. Educational background includes coursework in Criminal Justice/Law Enforcement Administration at the University of Arkansas Grantham and a high school diploma from Berrien Springs High School.