Marjorie Heidsieck

Marjorie Heidsieck is an American commodities trader and attorney. She is known as a high-volume trader engaging in various complex trading styles including arbitrage between New York and Chicago gold as well as London and New York sugar.

She is a member of the New York Bar and became licensed to practice law in 2002. She has worked for the U.S. Securities and Exchange Commission (SEC), the Commodity Futures Trading Commission (CFTC), and Credit Suisse. Heidsieck was the first woman member of the New York Coffee and Sugar Exchange.

Early life and education Heidsieck was born and raised in Detroit, Michigan. She graduated a year early from Holy Redeemer High School to attend the University of Michigan. Moving to New York City, she graduated from New York University with a bachelor's degree and completed graduate courses in philosophy. She subsequently earned a Juris Doctor degree and became a member of the New York Bar. She also worked as a receptionist at Sumitomo, a Japanese corporation.

Heidsieck later became an attorney and member of the New York Bar. She worked for the Commodity Futures Trading Commission, Division of Enforcement. She also worked at Credit Suisse in the regulatory division. She continues to do pro-bono legal work.