Marcos Siebert (born 16 March 1996 in Mar del Plata) is an Argentine racing driver.

He remained with Jenzer for the 2016 season and claimed the championship ahead of Mick Schumacher.

In 2015, Siebert joined Jenzer for the post-season test at Yas Marina and to act as their reserve driver for 2016.

[1][2] In November 2016, Siebert once again took part in post-season testing with Jenzer and Trident Racing.

[3] In March 2017, Siebert joined Campos Racing for the pre-season test at Estoril.