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Founded in 1955, Mullen, Sondberg, Wimbish & Stone, PA is a full-service public accounting and consulting firm located in Annapolis, Maryland. We have served a wide variety of clients in the Baltimore-Washington metropolitan area for over 65 years.


Currently the firm consists of five partners, Patrick M. Hantske, Michele L. Moore, John G. Wiland, Philip Wimbish and Eric P. Siegfried. All specialize in tax and audit services and were long term employees of the firm prior to becoming partner.


In addition to individual tax planning and preparation, accounting, auditing and business tax services, we also provide a variety of management advisory and business consulting services. Our clients include a myriad of professionals including contractors, real estate, legal, engineering, auto dealerships, retail/wholesale operations, healthcare, among others. The firm also has a strong background providing services to non-profit organizations.


Mullen, Sondberg, Wimbish & Stone, P.A. relies on an experienced and streamlined management team to achieve efficient operations. We seek to develop a one-on-one relationship with our clients so that we may combine our expertise with our knowledge of your environment and its unique characteristics to better serve you. We maintain a high partner-to-staff ratio to ensure top level attention to your needs at all times. We take pride in giving you the assurance that the personal assistance you receive comes from years of advanced training, technical experience and financial acumen. Our continual investment of time and resources in professional continuing education, state-of-the-art computer technology and extensive business relationships is indicative of our commitment to excellence.


We take a personal as well as a professional interest in seeing that you receive the full level of service you deserve as our client. Selecting a CPA firm is one of the most important decisions you will make. As both your financial and business advisor, that firm should be expected to provide specialized and technical services in a timely and efficient manner. We are proud of our excellent reputation in delivering that high level of expertise and professionalism to our clients. We invite you to call and see how Mullen, Sondberg, Wimbish & Stone, P.A. can help you.


Mullen, Sondberg, Wimbish & Stone, PA is a licensed CPA firm in Maryland, DC and Virginia

Memberships and Accreditations include:

  • AICPA (American Association of Certified Public Accountants)

  • MACPA (Maryland Association of Certified Public Accountants)
  • MANO (Maryland Association of Non-Profit Organizations)
  • Employee Benefit Plan Audit Quality Center
  • Government Audit Quality Center

Our Quality Assurance Program

Our firm participates in the Peer Review Program prescribed by the American Institute of Certified Public Accountants and the Maryland Association of Certified Public Accountants. To view a copy of our most recent report click here.