From 1988 to 2008, Ehrlich was self-employed as a certified public accountant, focusing on business consulting and tax planning and preparation.

Ehrlich also co-founded two non-profit environmental and energy organizations, Healthlink, Inc. and Wenham Lake Watershed Association.

Until her election in 2008, Ehrlich served as HealthLink president, media liaison, political strategist, and spokesperson.

As a co-founder of Wenham Lake Watershed Association, she brokered the successful corporate cleanup of a major drinking water source for 80,000 residents on the North Shore of Boston.

[citation needed] Beginning January 31, 2022, she became the Federal Emergency Management Agency's Region 1 Director.

[2] Ehrlich will oversee emergency management operations for Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont.

Ehrlich went on to compete in the March 4 Special Election against Republican John Blaisdell and Independent Mark Barry, both from Marblehead.