Halil Ergin Ataman (born January 7, 1966, Istanbul) is a Turkish basketball coach. He has managed top-tier European clubs such as Anadolu Efes and Panathinaikos and has also served as the head coach of the Türkiye National Basketball Team. During his club career, he has won the EuroLeague championship three times.

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Ataman was born and raised in Istanbul. He completed his secondary education at Galatasaray High School.

After graduating from Galatasaray High School, he studied at the Faculty of Business Administration at Istanbul University. He also completed observation and internship programs in the United States, focusing on basketball coaching.

Ataman began his coaching career in the early 1990s with the youth teams of Efes Pilsen. He has coached several major clubs, including Beşiktaş, Galatasaray, and Anadolu Efes in Türkiye, as well as Montepaschi Siena in Italy. In 2002, he won the FIBA Saporta Cup with Siena. In 2012, he led Beşiktaş to a treble: the Turkish League, Turkish Cup, and EuroChallenge titles.

He took over Anadolu Efes in 2017 and won back-to-back EuroLeague championships in 2021 and 2022. In 2023, he signed with Panathinaikos and led the Greek club to another EuroLeague title in 2024, as well as the Greek Cup in 2025. Since 2023, he has been the head coach of Panathinaikos. Ataman served as the head coach of the Türkiye National Basketball Team from 2014 to 2016 and resumed the position in 2022. He led the team to the quarterfinals of the 2014 FIBA World Cup.

• 3× EuroLeague Champion (2021, 2022 – Anadolu Efes; 2024 – Panathinaikos)
• EuroLeague Coach of the Year (2021)
• 6× Turkish Basketball Super League Champion
• Greek League & Greek Cup Winner (2024, 2025 – Panathinaikos)
• FIBA 2014 World Cup – Guided the national team to the quarterfinals

Ataman has achieved international success at the club level, contributing to team performance through modern offensive systems and motivational leadership.

He has taught at the university level and organized seminars on coaching. He is also a speaker at conferences that focus on the sociological dimensions of sports. Still active in his career, Ataman has made a broad impact on Turkish and European basketball. He serves as a role model for the new generation of Turkish coaches and athletes, both technically and professionally.

He is married and has one child.