Ms. Rothschild began her career at DDB in 1969 when it was still known as Doyle Dane Bernbach. In her last nine years at the agency, she won more awards than any other writer at DDB. She eventually rose to the position of exec VP-creative director and became a member of the agency's New York board of directors.
In 1986, Ms. Rothschild left the agency alongside DDB's then-chairman, Roy Grace, to become president of their own eponymous shop, Grace & Rothschild Advertising. There she created award-winning campaigns for clients such as Range Rover and J&B Scotch for 14 years until Mr. Grace retired and Ms. Rothschild merged with Della Femina Jeary & Partners in 2000.
During her illness, she became a board member of the Lung Cancer Alliance, where she launched a campaign challenging the stigma associated with the disease and to expose the rising incidence of lung cancer among nonsmokers.
Ms. Rothschild was inducted into the One Club's Creative Hall of Fame in 2005, making her one of 40 writers and four women to be so recognized.