College and amateur Pierrot played two years of
college soccer at
Northeastern University between 2014 and 2015, before transferring to
Coastal Carolina University in 2016, where he played for another two years. Pierrot also appeared for
USL PDL side
Reading United in 2016 and 2017.
Professional On 19 January 2018, Pierrot was selected with the 27th overall pick of the
2018 MLS SuperDraft by
Colorado Rapids. However, he did not sign with the club. On 27 July 2018, Pierrot signed a four-year contract with
Belgian First Division A side
Mouscron. One year later, he joined French
Ligue 2 club
Guingamp. He signed a four-year contract. On 3 July 2022, Pierrot signed a three-year contract with
Maccabi Haifa of the
Israeli Premier League. On 10 September 2024, Pierrot signed a three-year contract with
AEK Athens. ==International career==