EDUCATION

Emory University School of Law
J.D., cum laude, 2011

Emory University Rollins School of Public Health
M.P.H., 2011

The University of Texas at Austin
B.A., Psychology, summa cum laude, 2006

JUDICIAL CLERKSHIP

Law Clerk for the Hon. Yvonne Gonzalez Rogers
U.S. District Court for the Northern District of California (2015-2016)

ADMISSIONS

Texas

Georgia

Georgia Court of Appeals

Georgia Supreme Court

U.S. Courts of Appeals for the Second, Sixth, and Seventh Circuits

U.S. District Courts for the Northern, Southern, Eastern, and Western Districts of Texas

U.S. District Courts for the Northern and Middle Districts of Georgia

U.S. District Court for the Northern District of Illinois

Diane Wizig is a tireless advocate for her clients. Her practice focuses on complex litigation, representing energy and financial services clients in a variety of commercial and consumer disputes.

Diane has significant experience leading all facets of case strategy, discovery, and general pre-trial efforts in class actions and bet-the-company litigation. She has a proven track record of winning dispositive motions in both state and federal courts nationwide, allowing her clients to escape the unnecessary costs of protracted litigation and the uncertainty of trial.

Diane also serves as the firm’s Pro Bono Partner. In this role, she leads McDowell Hetherington’s pro bono efforts—which have ranged from staffing Houston Volunteer Lawyers’ Legal Advice Clinic, to establishing McDowell Hetherington’s eviction defense docket during the COVID-19 pandemic, to leading the firm’s involvement in the groundbreaking Law Firm Antiracism Alliance (LFAA) since it was founded in 2020. Diane is proudly serving as one of the founding co-chairs to LFAA’s Education Working Group, building coalitions among diverse stakeholders committed to anti-racism efforts in education.

Prior to joining McDowell Hetherington, Diane first practiced as an environmental litigator at an international law firm in Atlanta. Diane then served as a law clerk to the Honorable Yvonne Gonzalez Rogers on the United States District Court for the Northern District of California in Oakland before returning to her hometown in Houston.

Outside of the office, Diane enjoys cheering on the Golden State Warriors and traveling with her wife and daughters.

EDUCATION

Emory University School of Law
J.D., cum laude, 2011

Emory University Rollins School of Public Health
M.P.H., 2011

The University of Texas at Austin
B.A., Psychology, summa cum laude, 2006

JUDICIAL CLERKSHIP

Law Clerk for the Hon. Yvonne Gonzalez Rogers
U.S. District Court for the Northern District of California (2015-2016)

ADMISSIONS

Texas

Georgia

Georgia Court of Appeals

Georgia Supreme Court

U.S. Courts of Appeals for the Second, Sixth, and Seventh Circuits

U.S. District Courts for the Northern, Southern, Eastern, and Western Districts of Texas

U.S. District Courts for the Northern and Middle Districts of Georgia

U.S. District Court for the Northern District of Illinois

  • Representing energy companies in putative consumer class actions in New York federal court related to price-setting practices.
  • Representing software company in action against former employees for misappropriation of trade secrets and violation of non-compete agreements.
  • Won summary judgment in putative class action related to consumer energy contract disclosures and then argued the appeal, leading to summary affirmance by the Second Circuit in 2023
  • Won the first summary judgment ever granted under a New York statute related to consumer energy contract disclosures, which was summarily affirmed by the Second Circuit, ending a putative class action after six years of litigation.
  • Won dismissal of a variable-rate electricity and natural gas class action filed in New Jersey federal court.
  • Defeated a class certification motion that asked a Texas federal court to certify a class in which the alleged Telephone Consumer Protection Act (TCPA) violations could have resulted in statutory damages of up to $5 billion.
  • Won dismissal of a variable-rate electricity class action filed in Illinois federal court, which was affirmed by the Seventh Circuit.
  • Won dismissal of two variable-rate electricity and natural gas class actions filed in New York and Illinois federal courts.
  • Won the bellwether motion to dismiss filed by all retail electric providers in the Texas Winter Storm Uri MDL, one of the only industry motions that was fully granted.
  • Represents a software company in commercial disputes across the country.
  • Represented a construction company and its individual owners in a dispute alleging theft of trade secrets, breach of fiduciary duties, and tortious interference.
  • Order of the Coif
  • Georgia Association of Women Lawyers – Outstanding Student Award
  • Law Firm Anti-Racism Alliance – Education Working Group Co-Chair