After his college basketball career, Tillie returned to France, in May 2010, and signed a two-year deal with
ASVEL. In July 2011, he extended his contract with ASVEL. He played with the
Washington Wizards' summer league squad in the
2012 NBA Summer League. In July 2012, he left France, and signed a two-year deal with
UCAM Murcia of the Spanish
Liga ACB. In July 2014, he signed a one-year deal with the Spanish
EuroLeague club
Baskonia. In July 2017, he signed a two-year deal with the Greek EuroLeague club
Olympiacos. However, he was waived on 5 July 2018. On 25 July 2018 Tillie signed a one-year deal with
Herbalife Gran Canaria of the
Liga ACB and the
EuroLeague. On 8 July 2019 Tillie signed a one-year deal with
AS Monaco of the
LNB Pro A. On 6 February 2020 he signed with
Budućnost of the
Adriatic League. Tillie signed with
Ryukyu Golden Kings on 6 July 2020. On August 2, 2021, Tillie returned to Greece, signing with
Kolossos Rodou. In 22 games, he averaged 8.5 points, 5.6 rebounds, 0.8 assists and 0.8 steals, playing around 24 minutes per contest. On July 25, 2022, he returned to France, signing with
Cholet Basket. ==National team career==