Ms. Johnstone was raised in St Louis, where she started her series of careers working as a Molecular Biologist at the Washington University Medical School, extending that to the University of Miami Medical School.  She then founded a business as a Medical/Legal Research Consultant.  The company advised law firms nationwide and provided a records organizing service, “Order in the Court.”  After moving to Houston, she lectured at the University of Houston Law School, and was on the Health/Law Policy Institute board.

At the same time, her artistic side flourished, first as a dancer and for the past 30 years as a nationally performing duo pianist (often played on National Public Radio, and local KUHF).  One of her recordings includes a narration by First lady Barbara Bush, and is housed in the President’s Library.

In her “spare time”, Sheila is a community leader serving on many Boards and Committees.  A sample includes Shepherd School of Music, Houston Symphony League, Leadership Houston, Neighborhood Center, Pan American Round Table, Career and Recovery Resources, Chair-elect Mayor’s Council for Trade and Development, North America, Mexico and Canada (Secretary for 2 yrs. and recently voted as Chair-Elect).  Proficient in American Sign Language (ASL), she teaches English to deaf students , as well as ASL to employers of deaf people.  Sheila is now teaching American Sign Language classes for Be An Angel at the Hope and Healing Center.  She volunteers at CanCare and is a Court-Appointed Child Advocate.