Ismael Zambada Sicairos

Ismael Zambada Sicairos was born around 1982 in Sinaloa, Mexico somewhere west of the Sierra Madre Occidental. His father, Ismael "El Mayo" Zambada, was already deeply entrenched in the drug trade at this time. He has three paternal half-brothers in the Sinaloa Cartel, Vicente Zambada Niebla, Serafín Zambada Ortiz, and Ismael Zambada Imperial. His father has been a dominant force in the Sinaloa Cartel for decades, working alongside or in competition with figures like Joaquín "El Chapo" Guzmán.

Growing up in that environment, Zambada Sicairos and his siblings were exposed to cartel operations from an early age. He eventually assumed responsibilities within the organization, playing a role in overseeing drug trafficking logistics, security, and cartel finances. He has allegedly employed people to manage some of these logistics for him, including for drug shipments at the border cities of Mexicali, Nogales, and San Luis Río Colorado. His associate, Alfonso Limón Sánchez, is believed to handle much of his financial duties currently. Limón was imprisoned from 2014 until 2017 when he escaped the Aguaruto prison near Culiacán. He escaped along with four other people, among them members of Los Ántrax, which is the enforcer gang that was initially created to provide protection to Mayo Zambada. Limón Sánchez was pointed out as being a possible successor to the cartel prior to the arrest of Zambada García.

His nickname, "El Mayito Flaco" ("Skinny Little Mayo"), distinguishes him from his brother, Ismael Zambada Imperial "El Mayito Gordo" ("Fat Little Mayo").

Due to his involvement in organized crime, little is publicly known about Zambada Sicairos' personal life. He is believed to have several properties across Mexico, particularly in Sinaloa and Baja California. Unlike some other cartel figures, he has maintained a relatively low profile, avoiding public appearances and social media exposure.

Criminal career

Zambada Sicairos is identified as the leader of the "Mayiza" faction, a branch of the Sinaloa Cartel that was led by his father. He is the only one of his four brothers to have not been imprisoned before, in addition to maintaining a relatively low profile until the arrest of El Mayo in 2024. As such, he was expected to inherit leadership of El Mayo's position.

His specific responsibilities have included:

Drug trafficking operations – Overseeing the movement of cocaine, methamphetamine, heroin, and fentanyl into the United States. Particularly responsible for overseeing shipments of methamphetamine and its precursors from Asia to Mexico and towards the United States.

Money laundering – Managing cartel financial operations, including money laundering networks operating in Mexico and abroad.

After the 2016 arrest and extradition of El Chapo Guzmán, tensions grew between factions within the Sinaloa Cartel. Zambada Sicairos has been involved in internal conflicts with Los Chapitos (a group led by El Chapo's sons) and Los Guanos, who both have sought to consolidate power.