Davis received her Bachelor of Science at the University of Houston.
Personnel clerk Shell Oil Corporation, Houston, 1974—1977. Volunteer coordinator to representative Dick Slack Texas House of Representatives, Odessa, 1977. Researcher to senator E. L. Short Texas State Senate, Austin, 1978—1979.
Legislation assistant to Republican Jim Mattox United States House of Representatives, Dallas, 1979—1982, assistant to Republican John Bryant Washington, District of Columbia, 1983—1986. Administration assistant Dallas County Commissioner Court, 1985—1986. Campaign consultant to mayor Annette Strauss Office of Mayor, Dallas, 1986.
Dallas coordinator Mike Dukakis for President, 1987—1988. Campaign consultant to councilman Charles Tardy, 1988. Political director general election Dallas County Democratic Committee, 1988.
Committeewoman Texas State Democratic Executive Committee, since 1986. Political consultant YD Associate, since 1986. Small business owner.
Member District 111 Texas House of Representatives, since 1993.
Member of Dallas County Democratic Women (auditor), West Dallas Community Centers (board director), Metropolitan Business & Professional Women Clubs (co-Chairman.govt. affairs 1985), National Association for the Advancement of Colored People Dallas Chapter (board member).