Blumenstein started her career at the Tampa Tribune, and then contributed to Gannett Newspapers and Newsday.

[7] After more than two decades at The Wall Street Journal, Blumenstein joined The New York Times as the Deputy Managing Editor in February 2017, making her one of the highest ranking women in the newsroom.

She also oversaw the evacuation and relocation of over 200 New York Times employees[8] and family members from Afghanistan.

[10] Blumenstein has reported on General Motors, Detroit, AT&T Corp., WorldCom Inc., the New York State legislature, China, and mergers in the telecommunications industry.

[1][6] In 1993, she won the New York Newswomen's Award for coverage of the Long Island Railroad shootings.