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  • Partner, Eisner Advisory Group LLC
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William St. Clair is a Partner in the Private Client Services Group, and he founded and oversees the Franchise Services Group at Eisner Advisory Group. Before joining the firm, Bill was the Founder of St. Clair CPA Solutions, P.C. The firm served as an advisor to hundreds of franchisors and franchisees, and a leading accounting, audit, tax, advisory, and financial consulting firm.

With more than 40 years of experience, in accounting, tax, and finance, Bill has a successful record of creating strategic plans to help businesses and individuals gain wealth. He is a sought-after advisor, and his experience as a successful entrepreneur allows him to share his knowledge and introduce clients how to recognize opportunities for additional profits and grow their business. Additionally, Bill has securities industry Series 7, 63. 65 and 66 securities licenses.

Bill meets personally with clients to understand and assess a client’s needs for accounting and other financial services. As an advisor for every stage of the business or family lifecycle, he shares his expertise on a wide range of financial matters. Clients have confidence with Bill’s hands-on, problem-solving, dependable plans, and reliable account management services. Additionally, colleagues reach out to Bill for professional leadership, guided by his lifelong dedication to integrity and service.

With the firm’s resources, Bill is able to create value-driven strategies to address clients’ needs while planning for future contingencies and growth.


  • Tax
  • Accounting Services
  • Franchise Services
  • Financial Planning
  • Business Consulting
  • Manufacturing & Distribution
  • Professional Services
  • Construction
  • Real Estate

Credentials & Education

  • Certified Public Accountant (CPA)
  • Life & Health Insurance License (LHL)
  • LaSalle University: BS, Accounting; BA, Economics


  • American Institute of Certified Public Accountants
  • Pennsylvania Institute of Certified Accountants
  • Friends of Father Judge High School: Chair, Board of Directors
  • The National Eagle Scout Association

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