Firm Leadership

About / Firm Leadership / William Oyster

William Oyster

William Oyster


Member of the Firm
Tax & Accounting Services

Carlisle, PA


Connect with me on LinkedIn

Bill serves as Member-in-Charge of the firm's Carlisle office. With more than 25 years of experience in public accounting, Bill is an integral member of the firm’s tax and accounting services department. His strong background in accounting and advisory services, as well as employee benefit plan audits, helps guide clients through their strategic decision process. His love for technology helps him navigate his clients’ challenges and become a better advisor.

Bill has been an instructor of our in-house training programs on governmental and nonprofit accounting, a presenter for the firm's annual client seminars, and has been invited to speak at numerous external association events.

Quick Facts


  • Certified Public Accountant – Pennsylvania


  • B.S. Business Administration/Accounting – Bloomsburg University

Work Highlights

  • Year joined SEK: 2017
  • Year admitted as a Member: 2020

Q&A with Bill

  • As a kid, what did you want to be when you grew up?

    Monster Truck Driver

  • What was your first job?

    Stocking shelves at Acme Markets

  • What are your hobbies?

    I am an enthusiastic Steelers fan, loves anything outdoors (especially camping and hunting), and am a coffee snob who enjoys bold coffee.

  • What is the most inspiring part of your job?

    Helping others solve problems and making their days better

My Industry Specialties

  • Construction
  • Healthcare Advisory
  • Healthcare Professionals
  • Nonprofits
  • Food Service
  • Professional Service Firms
  • Real Estate
  • Closely-Held Businesses

My Service Specialties

  • Business Accounting & Advisory
  • Tax & Compliance
  • State & Local Taxes
  • Outsourced CFO

Client Testimonials

  • Bill provided many additional fine points, at the end of the engagement, that we found extremely useful - a "value added" that we had not anticipated.

    A Carlisle Audit Client

  • Bill has been willing to patiently guide us through a process that is foreign to our newly appointed Board. Well done and thanks to him for keeping us on the path to becoming more knowledgeable for understanding our errors and ways to improve.

    A Carlisle Audit Client

  • I would recommend William Oyster to any of my colleagues. I have had experience with Mr. Oyster as our local auditor for six of the eight years I've been with this school district. Couldn't ask for better. He is down to earth, thorough, and explains things very well. He also gives us a heads up of what's coming through the pipeline so we are not blindsided by changes that need to be made. 

    A Carlisle Audit Client

  • Bill is friendly and knowledgeable.

    A Carlisle Audit Client


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