The Sindicato de Maestros al Servicio del Estado de México (SMSEM) is a prominent labor organization with over 60 years of commitment to safeguarding the employment stability of teachers in the State of Mexico. Renowned as the largest and most significant independent teachers' union in Mexico and Latin America, SMSEM plays a crucial role in advocating for the rights and interests of its members.

The union offers a wide range of services, including legal advice, medical resources, and various forms of educational support. It operates family care centers, a store for educational supplies, and housing initiatives to enhance the quality of life for its members. In addition, SMSEM organizes cultural and sporting events to foster community and camaraderie among educators.

As a pillar of support for teachers, SMSEM empowers its members with resources and initiatives aimed at enhancing their professional and personal well-being. Through continuous improvements and collaborations, SMSEM reinforces its mission of promoting education for the benefit of society.