He was the founder of Telerate, a pioneering global financial communications network, as well as Loanet, a securities-tracking firm.

In 1969, Hirsch founded Telerate, a global communications network that provided real-time financial information to institutions worldwide.

[1] Under Hirsch's leadership as president and chief executive, Telerate became a crucial platform in the financial services industry.

In December 2013, Hirsch expanded his business portfolio by purchasing Backstage magazine and Sonicbids, companies that served the entertainment and music industries.

[citation needed] Hirsch also founded the Black Watch Polo Team, which became notable for star players such as Nacho Figueras, Facundo Pieres and Mariano Aguirre.