She is a member of the Maryland House of Delegates, representing District 22 in Prince George's County since 1991.

[1] Healey first got involved with politics in grade school after attending a campaign parade for then-presidential candidate John F. Kennedy.

While reporting for The Catholic Review, Healey met her future husband, Neal Conway.

The bill passed to form a task force investigating a post-Labor Day start, of which Healey was a member.

[13] In 2019, Healey introduced legislation to create a task force to monitor and address future deforestation and make recommendations to prevent forest loss without disrupting growth and development.

[14] In 2004, Healey voted in favor of legislation that would levy a two-percent tax on health maintenance organizations to keep medical malpractice insurance costs for doctors in check.

[15] In 2006, Healey voted in favor of legislation that would require Walmart to pay more for employee health care benefits.

[16] In 2019, Healey voted in favor of legislation that would create a five-person panel to investigate and negotiate the prices of high-priced drugs.

[23] In 2013, she voted in favor of legislation to repeal the death penalty, which was signed into law by Governor Martin O'Malley.