Certified Public Accountants

Our Team

Patrick J. Flynn, CPA, CPC, CVA

Patrick is the managing partner of the Firm.  During his 25-year career in public accounting, Patrick has concentrated on assisting individuals and privately held businesses in all facets of finance, tax and a accounting.  Patrick has also worked extensively with qualified retirement plans and professional athletes, and has appeared in court as an expert witness in business and divorce matters.  Patrick started his career working for KPMG and Laventhol & Horwath, two of the largest international accounting firms.  He is a member of the American Institute of CPAs, Greater Washington Society of CPAs, Maryland Society of Accountants, a Certified Pension Consultant (CPC) with the American Society of Pension Professionals and Actuaries, and a Certified Valuation Analyst (CVA) with the National Association of Certified Valuation Analysts.   Patrick obtained his B.S.B.A. from Duquesne University, and a M.S. in Taxation from Georgetown University.  In Pat's spare time, he enjoys physical fitness activities, Scuba diving and is an active PADI Scuba diving instructor.  Pat resides in Gaithersburg and enjoys spending time with his two children.


William T. Abell, CPA, CVA

Bill is a partner of the firm with over 25 years experience in accounting, taxation, and automated accounting and tax systems.    Bill worked for  PricewaterhouseCoopers for 16 years in tax services and in automating corporate and individual tax compliance for clients as well as the firm itself before joining Flynn, Abell & Associates, LLC.   He is a member of the American Institute of Certified Public Accountants, the Greater Washington Society of CPAs and is a Certified Valuation Analyst (CVA) with the National Association of Certified Valuation Analysts.   Bill earned a B.S. in Accounting from the University of Kentucky and an M.S. in Taxation from Florida International University .   He resides in Washington, DC.

Hannah K. Nielsen

Hannah is an associate of the firm, and is in her fourth year with Flynn, Abell & Associates, LLC.  Hannah has a B.S. in Geography and Environmental Planning from Towson University and an M.S. in Accountancy from Phoenix University.  During her time with Flynn, Abell & Associates, she has worked in individual and business tax return preparation, payroll tax, and has assisted in audit work.  Hannah resides in Columbia, Maryland.



Andrew Mychajliw, CPA


Andrew is an associate of the firm with 14 years of experience in the field of public accounting.  He has worked for various CPA firms in the DC metropolitan area with an emphasis on helping individuals and businesses with tax compliance.  Andrew also has experience with attestation work and general ledger accounting.  Andrew graduated from the University of Delaware, earning a B.S. in Accounting, and successfully completed the CPA examination in 2002.   Andrew resides in Montgomery County, Maryland.