Between 1986 and 1991, she served as a key aide to Senator Lawton Chiles and then-Senator Al Gore. Browner headed the Florida Department of Environmental Protection from 1991 to 1993.
Browner came from Florida with a reputation as someone who could work with the private sector. While at EPA, she expanded the Agency's flexible public-private partnerships as alternatives to traditional regulation through Project XL (designed to find common sense, cost effective solutions to environmental issues at individual facilities) and the Common Sense Initiative (targeted at efforts involving entire industry sectors).
In 1995, Browner generated controversy, after she and the EPA were charged by the House Government Reform and Oversight Subcommittee on Regulatory Affairs with violating the federal Anti-Lobbying Act (18 U.S. Code § 1913) by faxing unsolicited material opposing the Republican-sponsored regulatory reform package to various corporations and public-interest groups.
As EPA Administrator, Browner also started the Agency's successful brownfields program, which, during her tenure, helped facilitate cleanups of contaminated facilities, especially in urban areas, and which leveraged more than $1 billion in public and private funds for cleanups.
After the Clinton Administration, Browner joined the Albright Group, a "global strategy group" headed by former U.S. Secretary of State Madeleine Albright. As a Principal in that firm, Browner assists businesses and other organizations with the challenges of operating internationally, including the challenges of complying with environmental regulations.
Browner is currently the chair of the Audubon Society; her term expires in 2008.
Browner married former Congressman Thomas Joseph Downey on June 21, 2007, her third marriage.