Penalber competed in the 55 kg event at the 2014 World Wrestling Championships held in Tashkent, Uzbekistan where she reached the quarterfinals.

[5] In 2018, Penalber won the gold medal in the 57 kg event at the South American Games held in Cochabamba, Bolivia.

[8] In March 2021, Penalber won the gold medal in the 57 kg event at the Matteo Pellicone Ranking Series 2021 held in Rome, Italy.

[16][17] A month later, Penalber also won one of the bronze medals in her event at the Matteo Pellicone Ranking Series 2022 held in Rome, Italy.

[21][22] Penalber won the gold medal in the women's 57 kg event at the 2023 Pan American Games held in Santiago, Chile.

[23] In 2024, Penalber won the silver medal in her event at the Pan American Wrestling Championships held in Acapulco, Mexico.

[27][28][29] After the Moldovan qualified for the final, Penalber entered the repechage, where she would face the German Sandra Paruszewski, two-time bronze medalist at the European Championships.

She lost to China's Kexin Hong in the bronze medal match, but finished in 5th place, the best placement in the country's history in the sport.