Itzhak Stern was a Jewish accountant

Accountant

An accountant is a practitioner of accountancy or accounting , which is the measurement, disclosure or provision of assurance about financial information that helps managers, investors, tax authorities and others make decisions about allocating resources.The Big Four auditors are the largest...

 to German industrialist Oskar Schindler

Oskar Schindler

Oskar Schindler was an ethnic German industrialist born in Moravia. He is credited with saving over 1,100 Jews during the Holocaust by employing them in his enamelware and ammunitions factories, which were located in what is now Poland and the Czech Republic respectively.He is the subject of the...

. He worked alongside Schindler as the accountant for his enamelware

Vitreous enamel

Vitreous enamel, also porcelain enamel in U.S. English, is a material made by fusing powdered glass to a substrate by firing, usually between 750 and 850 °C...

 company () in Kraków

Kraków

Kraków also Krakow, or Cracow , is the second largest and one of the oldest cities in Poland. Situated on the Vistula River in the Lesser Poland region, the city dates back to the 7th century. Kraków has traditionally been one of the leading centres of Polish academic, cultural, and artistic life...

 and greatly helped in running the company. He is credited with typing the list of names known as Schindler's list, a list of Jews who survived the Holocaust because of Oskar Schindler's intervention.

Even though he was Jewish and Schindler was a Nazi, Schindler gave his gratitude to Stern.