Nicknamed Magui, she first represented her native country at the Junior World Cup in 1993 in Barcelona, Spain, where Argentina won the gold.

The following year the penalty corner hitter played for the senior team, finishing second at the World Cup in Dublin, Ireland.

She was also nominated for the FIH's Best Player of the Year in 1999, won by Australia's Alyson Annan.

[5] Nevertheless in August 2023, Aicega (who was 49 years old by then) announced she would return to play for Belgrano Athletic the "Torneo Reubicación", a promotion and relegation tournament.

[9][10] She had also a brief tenre as director of ENARD (acronym of "Ente Nacional de Alto Rendimiento Deportivo") in 2017.