From 1989-1993, she served in the U.S. Attorney's Office in Los Angeles and then went into private practice at the San Francisco firm Landels Ripley & Diamond.

[5] In August 2010, Haag was appointed to the Northern District of California U.S. Attorney's Office by President Barack Obama and unanimously confirmed without debate by the United States Senate.

Attorneys nationwide on the development and implementation of national policies and practices regarding the government's approach to economic crimes and cybersecurity.

On January 13, 2016, Orrick, Herrington & Sutcliffe announced that Melinda Haag would be rejoining the firm as head of its Global Litigation Practice beginning on March 1, 2016.

[1] In an interview with KQED's Michael Montgomery, Haag cited concerns from constituents about the negative impact the marijuana industry was having in their communities.