William H.Sims, CPA

CEO, Partner

Bill helps nonprofit organizations maximize their assets and expand their efforts. He enjoys helping nonprofits fulfill the mission for which they’ve been established. With more than 40 years of experience providing accounting, tax, and business consultation to clients in a variety of industry groups, he is a recognized expert in the nonprofit sector with a concentration in religious organizations, social agencies, country clubs, and associations. In 2021, Bill was named “CPA of the Year” by TXCPA Dallas for his outstanding leadership and meritorious contributions to the accounting profession. He currently serves as Global Board Chair for Integra International. Bill joined SST Accountants & Consultants in 1995.

Professional Certifications

  • Certified Public Accountant, licensed in Texas, California and New York

Areas of concentration

  • Audit, tax and business consulting
  • Litigation support and expert testimony
  • Nonprofit and religious organizations and closely-held businesses

Professional Associations

  • American Institute of Certified Public Accountants
    • Served on the task force to develop certain auditing procedures
  • Dallas Society of Certified Public Accountants
    • Chair, 2019-2020
    • Board of Directors
    • Various Committees
  • Texas Society of Certified Public Accountants
    • Board member
  • Healing Hands Ministries, board member, and treasurer
  • Brother Bill’s Helping Hand
    • Former board member, treasurer, and president
  • Neighborhood Security Alliance, treasurer
  • Children’s Craniofacial Association, former treasurer
  • Exchange Club of Lake Highlands, past president, and board member
  • Park Cities Baptist Church, former assistant treasurer
  • National Association of Church Business Administration
  • Dallas-Fort Worth Association Executives
  • Texas Society of Association Executives
  • Board and Community Service Speaker to diverse industry groups on accounting-related topics


  • Bachelor of Business Administration Baylor University, 1980