Hirsch began karting at the age of 12, competing until 2004, most notably winning the Rotax Max Swiss Karting Challenge in 2002. After finishing runner-up in the Volant Mygale shootout in 2004 and racing part-time in the
British Formula Ford Championship a year later, Hirsch joined
Graff Racing to race in the
French Formula Renault 2.0 series. Hirsch then made a one-off appearance in Formula Renault Asia 2.0 in 2008, before taking a three year hiatus to focus on his studies at the
University of Geneva. In 2011, Hirsch raced in the first two rounds of the
FIA GT3 European Championship with
Graff Racing, taking a best result of fifth at
Silverstone. Following a two year hiatus, Hirsch joined
Team Endurance Challenge to race in the LMPC class of the
European Le Mans Series alongside
Paul-Loup Chatin. After finishing second at
Silverstone, the pair won the following three races to take the points lead, before securing the LMPC title by finishing second in the finale at
Le Castellet. Staying in the European Le Mans Series for 2014, Hirsch joined
Newblood by Morand Racing to race in the LMP2 class alongside
Christian Klien and Romain Brandela. Hirsch began the season with a third-place finish at
Silverstone, before scoring his only win of the season two races later at
Le Castellet and ending the year with a second-place finish at
Estoril to end the year third in points. During 2014, Hirsch also made his debut in the
24 Hours of Le Mans alongside Klien and Brandela, finishing sixth in the LMP2 class and tenth overall. Hirsch remained in the European Le Mans Series for 2015, joining
Greaves Motorsport alongside
Jon Lancaster and
Björn Wirdheim for his sophomore season in the LMP2 class. Starting off the season with a win at
Silverstone, Hirsch finished fourth in the following two races, before winning at
Le Castellet and finishing second at
Estoril to secure the LMP2 title. During 2015, Hirsch competed in the
24 Hours of Le Mans for the same team, running as high as second before retiring with an electrical issue. The following year, Hirsch was upgraded to an
FIA Gold Categorisation, and only raced at the
24 Hours of Le Mans for
Aston Martin Racing. Racing in the LMGTE Am class alongside
Liam Griffin and Andrew Howard, the trio finished seventh in class. Three years after his last appearance in racing, Hirsch joined
Rebellion Racing as their test and reserve driver for the
2018–19 FIA World Endurance Championship. == Karting record ==