Firm Profile
We believe in the value of relationships. We view every client relationship like a partnership, and truly believe that our success is a result of your success.

We are committed to providing close, personal attention to our clients. 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.

Rosemary C. McMahon, Principal, holds a Bachelor of Art of Business Administration degree from Mary Baldwin College. She is a licensed Certified Public Accountant in the Commonwealth of Virginia and is enrolled to practice before the Internal Revenue Service as an Enrolled Agent. In 2013, Rosemary became a Fellow of the National Tax Practice Institute. Rosemary is also a Quickbooks Pro Advisor. She is an active member of the National Association of Enrolled Agents and the Virginia Society of Enrolled Agents. She is also a member of the National Society of Accountants, the Virginia Society of Certified Public Accountants, and the National Society of Tax Practitioners.

As an accountant and tax professional, Rosemary has over 35 years experience with a wide range of business, individual, fiduciary and professional clients throughout the United States. Her knowledge incorporates all levels of federal and state income tax law. She has held various accounting positions in both the public and private sectors. Her volunteer experiences include positions with Army Community Services, Officers Wives Clubs, PTAs, homeowners and office condominium associations, and professional organizations.

An Enrolled Agent (EA) is a federally licensed tax practitioner who has technical expertise in the field of taxation and is empowered by the U.S. Department of the Treasury to represent taxpayers for audits, collections and appeals before all administrative levels of the Internal Revenue Service.

Principal state of licensure: VA/ CPA license number: 20179/ IRS Enrollment number: 46129/ Address: 301 Maple Ave W #320, Vienna, VA 22180-4301/ Phone Number: 703-272-8840/ Fax Number: 703-865-6270/ email address: rory@mcmahoncpa.com/ Contact Person: Rosemary C. McMahon, EA, CPA