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Practice & Experience

Experienced Advisors


Ability to Stay
One Step Ahead

Knowledge That Can Serve Your Needs


Timothy A. Nanni, CPA

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Founder and Shareholder

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Timothy A. Nanni was born in Philadelphia, PA and during his late teenage years, moved to the suburbs of West Chester, PA.  During this intermediary time he attended Officer's Candidate School (OCS) for the U.S. Army and became a 1st Lieutenant.  Later, in 1969, after working with his family's accounting firm, he began to work  as a sole practitioner in the Borough of West Chester, as a Public Accountant,  he has been here ever since.  He became a CPA during October 1997.  He has advised countless individuals on internal control, profitability, gross margins and accounting ratios.  He loves accounting to the point where his clients have become very good friends over the years.  With limited time, he spends the a lot of the summer at his vacation home in Avalon, NJ.  He is an avid traveler and enjoys visiting his relatives in Abbruzzo, Italy.  He is a grandfather and loves spending time with his 5 grandchildren.  



Timothy J. Nanni, CPA, MST

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Managing Director and Shareholder

Timothy J. Nanni attended Archmere Academy High School, graduated from Lafayette College with a Bachelor of Science in Biology, he pursued medical research at Temple and University of Pennsylvania Medical School, where he made the big decision to change directions and learn accounting and business while attending Wharton at University of Pennsylvania.  He added a skill to to his father's practice and passed the Federal Series 7 exam and was a financial adviser for 8 years at Ameriprise Financial Inc., eventually selling his practice in 2008.  He passed the CPA exam in 2014,  prior to this he was an Enrolled Agent as designated by the Internal Revenue Service.  In 2017, Tim completed a Master's in Science in Taxation at St. John's Tobin School of Business.  He is a member of the American Institute of Certified Public Accountants and Pennsylvania Institute of Certified Public Accountants.  Tim is married to his beautiful wife Maria and has 2 boys, Tim Jr and Lucca. He enjoys traveling to the beaches of Greece and visiting his in-laws and loves to fish in his spare time with his two sons. 



Sophie K. Gelling
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Junior Accountant & Office Manager

Sophie Gelling was born and raised in West Chester, PA. Sophie completed her bachelor’s degree at Gettysburg College in 2021, during which time Sophie worked as an Office Assistant for the Garthwait Leadership Center and was a member of the women’s volleyball team. She spent two semesters studying in Berlin and Washington, D.C. While off-campus, she interned across various industries, from international relations thinktanks to tech startups.

Sophie’s sharp attention to detail and strong work ethic enables our clients to have always have a reliable communications liaison within our small firm, ensuring that support is provided in a timely manner. To accelerate her growth in the accounting field, she is working toward becoming an Enrolled Agent with the IRS.

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