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Juan Antonio Sierra is an experienced professional in the field of security and prevention, currently serving as a docente at Escuela de Prevención y Seguridad Integral (EPSI-UAB) since September 2020, where responsibilities include teaching "Prácticum I and II" focused on project development related to risk analysis. From May 2015 to present, Juan Antonio serves as a coordinator of private security services at CLECE SEGURIDAD, including coordination for Fútbol Club Barcelona. Additional roles include director of commercial development projects at PYCSECA SEGURIDAD and professor of private security for an extensive training program. Prior experience encompasses risk analysis and private detective work, along with a series of coordination roles in various security companies. Educational qualifications include a degree in Prevention and Integral Security from Universitat Autònoma de Barcelona, along with several specialized certifications from Universitat de Barcelona in private security management and risk detection.