[3] Namús made her professional debut on 18 May 2007, scoring a four-round unanimous decision (UD) victory against Maria Eugenia Lopez at the Palacio Peñarol in Montevideo, Uruguay.

[5] Two years later, after nine fights with eight wins (five by stoppage) and one no contest, she fought for her first full world title—the WBO female light welterweight title—against reigning champion Fernanda Soledad Alegre on 17 December 2011 at the Parque Municipal Eva Perón in Lomas de Zamora, Argentina.

[8] Following the consecutive defeats to Alegre, Namús scored five wins, one by knockout (KO), before facing the reigning undisputed welterweight champion Cecilia Brækhus for the WBA, WBC, IBF, WBO, and vacant IBO female titles.

[9] After a six-round UD victory against Marisa Nuñez in April 2017,[10] Namús faced Yamila Reynoso for the vacant IBF female junior middleweight title on 12 August at the Palacio Peñarol.

In a fight which saw Reynosa receive a point deduction for use of her head,[11] Namús captured the vacant IBF title with a wide UD victory, with the three judges' scorecards reading 100–89, 99–90, and 98–91.