About Mabel

George & Mary Lou Murphy, with children Maura, Randy, Mabel and Melany

George & Mary Lou Murphy, with children Maura, Randy, Mabel and Melany

Mabel Murphy Simpson

has been a Richardson resident for 53 years. A Texas native, she moved from Houston at age 4 when her father George was transferred with Texas Instruments. The Murphys lived in the southwest quadrant of Richardson until 1999, when Mabel, her husband Hugh Simpson, daughter Murphy and son Josh, moved to Canyon Creek in the Place 4 district.

Mabel attended Richardson Independent School District schools from K-12, graduating from Richardson High School in 1976. Her undergraduate degree is a Bachelor of Science in Criminal Justice from Southwest Texas State University. She worked in the oil and gas industry as a Landman for three years after college graduation in order to fund her law school education. Mabel completed a Juris Doctorate at the University of Tulsa College of Law in 1987, specifically focused on the National Energy Law and Policy Institute program.

Mabel is an attorney, licensed to practice law in Texas, and a long-time entrepreneur. She operates Simpson Law, a full-time law practice and full-service Real Estate Title Company, both in Richardson. Simpson Law has a staff of seven and specializes in matters of real property and business, including related litigation. Mabel Simpson’s legal memberships include:

Mabel is the founding partner at Simpson Law, a full service law practice in Richardson.

Mabel is the founding partner at Simpson Law, a full service law practice in Richardson.


  •  State Bar of Texas, 1989-Current
  •  College of the State Bar of Texas- “Professionalism through Education” 2014-present
  •  Dallas Bar Association
  •  Collin County Bar Association
  •  Licensed to practice before the U.S. Tax Court; U.S. Northern District Court; U.S. Southern District Court, and the U.S. Eastern District Court
  •  Current member of Texas Land Title Association Legislative Committee, focused on all issues related to real property law and insurability

Mabel has volunteered in the Richardson community for decades. Presently, she serves as Advisory Board Member at University of Texas at Dallas (UTD), for the Institute of Innovation and Entrepreneurship (IIE) within the Jindal School of Management (JSOM), 2014-Current. Mabel has just recently helped launch the “Girls Going Places” program, which teaches finance to girls aged 12-18.

Past community service has been with some of the key organizations in the City of Richardson. Mabel served the Richardson Hospital Authority, first on the Advisory Board, then as a Trustee on the Voting Board. She was on the RHA Board through its successful partnership with and transition to the Methodist Hospital System.

Mabel and her family have been members of St. Paul Catholic Church for 53 years, and she was a board member at St. Paul the Apostle Catholic School for seven years.

A few other notable volunteer engagements during Mabel’s civic career:

  •  Cottonwood Creek Drainage Association, member and Voting Board Member
  •  Neighborhood Youth and Family Counseling Services of Richardson, Former Board Member
  •  Leadership Richardson, Graduate
  •  Junior League of Richardson, Member
  •  Corporate compliance consultant for the U.S. Green Building Council of North Texas from 2004-2012.