Continuing to perform in the independent circuit, Mulero entered the Extreme Wrestling Organization, where he first adopted the ring name Hiram Tua.

[2] Due to their ability to perform flashy aerial maneuvers, Jack Melendez decided to book them as a tag team that eventually became known as Los Aereos.

[3] Their subsequent feud was with top heel faction La Revolución Dominicana, which saw them unsuccessfully challenging for the IWA World Tag Team Championship in a ladder match.

[3] Los Aereos continued rising in the tag team division, eventually entering a feud with the Naturals, dropping the belts.

[3] After failing to regain them from the Naturals, they defeated Los Dueños de la Malicia, Dennis Rivera and Noel Rodríguez, for the first contenders spot, but once again lost the titular match.

The angle with La Malicia continued until early 2008, when Los Aereos left the IWA following an event that broke the promotion's administration in two conflicting bands, Miguel Peréz against Mario Savoldi.

[3] On July 26, 2009, Mulero turned on Díaz, adopting a heel persona known as "El Dueño del Espacio" Hiram Tua, a throwback to his EWO gimmick.

He entered a feud with Díaz before joining Orlando Colón in a stable, which saw both of them portray a single character, La Pesadilla.

He subsequently explained this action, stating that he intended to retire from the Puerto Rican circuit in order to pursue an international wrestling career.

He was ranked in the 150th slot in Pro Wrestling Illustrated's 2011 PWI 500, making him the highest rated wrestler that competed exclusively in Puerto Rico that year.

He returned to ECPW on April 13, 2012, participating in a three-way match, he picked the pinfall following a shooting star press after throwing his second opponent outside the ring.

He abandoned his local retirement for one night, briefly reforming Los Aereos in a charity card named "Un Junte para la Historia".

On June 8, 2013, Mulero performed in La Guerra, an event held prior to the Puerto Rican Day Parade, defeating Bestia 666.

When the administration splintered and several left to join Ground Zero Wrestling (GZW) in 2022, he was among the talents that migrated there, being placed in a feud with heavyweight champion Bryan Idol.

Among his most notable achievements of the year, Hiram Tua took the initiative to share his knowledge and experience by announcing the creation of content focused on Puerto Rican wrestling.

This new project sought to highlight local stories and talent, offering a unique perspective of one of the most respected wrestlers on the island.