Although small in terms of financial status, they were able to reach the Liga de Ascenso (second division) final in 1958.

Hernán Vivanco joined the club as the coach and began getting the players to play an exciting style of football.

Due to the cohesion and speed with which Hernán Carrasco had the team playing, Alianza became known as La Orquesta Alba (the Dawn Orchestra).

The team was made up of many great players, including Edgar "Pata Gorda" Morales, Roberto "La Burra" Rivas, Alberto "Pechuga" Villalta, Raúl "Araña" Magaña, Guido Alvarado, Salvador Mariona, Mario Monge, Luis "Cascarita" Tapia, Miguel "El Chueco" Hermosilla, Ricardo Sepúlveda and Jorge "El Conejo" Liévano.

In all, "La Orquesta Alba" outscored their opponents eighty-three to thirty-nine and won twenty of their thirty-six matches.

They then went on to become the first El Salvadoran club to win the CONCACAF Champions' Cup, defeating Jong Colombia over a three-leg series.

So too did domestic players including Miguel "La Mica" González, Herbert Machón, "Míchel" Cornejo, Armando Cortez Sandoval, Jaime "Samba" Saravia, Roberto "El Cuchillo" Guerra, Jaime "La Chelona" Rodríguez and Carlos "El Cacho" Meléndez.

Ricardo Sepúlveda, a member of "The Orquesta Alba", returned to the club as a manager and led them to their third championship and first in twenty years.

The brilliance of Chilean Raúl Toro powered Alianza to a fourth title in 1989; he scored the winning goal in the final against Luis Ángel Firpo.

The management of technician Juan Carlos Masnik and the heroic efforts of players such as Horacio Lugo, Marcelo Bauza, Uruguayan Alejandro Curbelo and Adrián de la Cruz powered the team to two more titles soon after.

Their 4–1 win over Santa Tecla in the final was the icing on the cake, and saw a double from Rodolfo Zelaya, plus strikes from league leading goalscorer Gustavo Guerreño, and midfielder Marvin Monterrosa.

The fastest goal in the history of the club (26 seconds) was scored by the Colombian Duvier Riascos on 15 September 2021 during a league match against Santa Tecla F.C.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

As of December, 2024 Below are the notable former and current players who have represented Alianza in Primera Division and international competition since the club's foundation in 1958.

The most successful all-time manager is Chilean Hernán Carrasco, who won four championships during his two tenures with Alianza FC (1966–67, 1989–92).

Jorge Humberto Rodriguez helped Alianza win the 2017 Apertura title and also achieve the distinction of being the first team to go the entire season undefeated.

Current members of the squad are: Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.