Necati Er, born on February 24, 1997 in Samsun, started athletics during his school years. While he was initially interested in sprints and long jump, over time he turned to triple jump. In 2013, he came seventh in this field at the European Youth Olympic Summer Festival and placed ninth in the 2017 European Under-23 Championship.
In 2018, he did not qualify for the finals by jumping 16.26 meters in the European Athletics Championship qualifiers, but in the same year, he achieved his personal best indoor performance with 16.61 meters, and this result was equivalent to the Turkish indoor record. In 2019, he won the gold medal by jumping 17.37 meters at the European Under-23 Championships held in Gรคvle, Sweden, and became his country's first male athlete to exceed the 17-meter threshold in triple jump; This jump was also a new Turkish record. In the same season, he reached the final of the World Championship and ranked 11th with 16.34 meters.
Participating in the Tokyo 2020 Olympics, Necati passed the qualifications and jumped 17.25 meters in the final, placing sixth. In the following years, at the 2022 Mediterranean Games, he finished fourth in the triple jump with 16.52 meters and fifth in the long jump with 7.76 meters; In the same year, he won the gold medal in the triple jump with 16.73 meters and the bronze medal in the long jump with 7.83 meters at the Islamic Solidarity Games.
In 2023, he received a silver medal at the World University Games with 16.83 meters, and another silver medal in the European Games team championship with 16.71 meters; However, he did not qualify for the final at the World Championships of the same year, jumping 16.59 meters.
He won the gold medal by jumping 16.78 meters at the 2024 Balkan Athletics Championships, came ninth in the European Championship final with 16.61 meters, and jumped 13.65 meters in his first Olympic attempt after Tokyo and was out of the final. In 2026, he broke the indoor record by jumping 16.66 meters at the Green Crescent Turkey Indoor Championships.
In the same year, he won the silver medal at the Balkan Indoor Championships with 16.53 meters and ranked 13th in the World Indoor Championships by jumping 16.36 meters.