Diane DeCesare, CPA, MT


Work hard, be curious and care about your people.

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Meet Diane

A mergers and acquisitions expert, Diane is a tax practitioner with an extensive background in business, accounting and financial planning. She puts her wide range of skills to work for S corporations, partnerships and individuals. Diane has provided cash flow, tax planning and financial review of documents for transactions.

Diane graduated with highest honors and finished first in her class at Drexel University, and is committed to sharing her knowledge with the next generation of accountants. She devotes time to college recruiting and staffing while emphasizing the importance of development and creating opportunities for young professionals in the industry.

Together with her husband, Mark, Diane owns a successful Italian water ice business in New Jersey. They’re proud to have been named “Best of South Jersey” by South Jersey Magazine and featured in the “Best Finds” section of The Philadelphia Inquirer.

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Professional History


  • American Institute of Certified Public Accountants (AICPA)
  • Pennsylvania Institute of Certified Public Accountants (PICPA)
  • Exit Planning Exchange (XPX)
  • Estate & Planning Council of Southern NJ


  • Philadelphia Exit Planning Exchange (XPX), Board of Directors
  • Rowan University Advisory Board
  • Drexel Accounting Advisory Council
  • Estate and Financial Planning Council of South Jersey
  • Local Catholic high school, Development Committee


  • Drexel
  • Villanova Law School Graduate Tax Program


  • Laventhol & Horwath
  • Hansen Savings Bank
  • Drucker & Scaccetti


  • Elijah Watt Sells Certificate for high performance on the Uniform Certified Public Accountant Examination


Q. What was it that drew you to Armanino?

The opportunity to collaborate with talented people whose expertise can facilitate client transactions. Our knowledgeable team members and Armanino’s wealth of resources allow me to fully help our clients reach their most important goals.

Q. What do you predict the future will look like for clients in the industries you serve?

With market fluctuations and ever-changing policies, what’s important is to focus on the business at hand. We assist our clients in defining their goals for their business and their family wealth in order to work towards a plan that will meet their expectations.

Q. What is the toughest decision you have ever made?

When my mom had Alzheimer’s and couldn’t live on her own anymore, I decided to set up my office at her house so I could stay by her side and avoid moving her to an assisted living facility. I knew it would be challenging to balance my job and my own family while working out of my mother’s home. It was important for me to take care of her when she needed me most as she was always there for us.

Q. Who is (or was) the most influential person in your life?

My parents. They did everything for us and were involved in all aspects of our lives. On top of that, they played an important role for some of my friends whose parents were not as active in day-to-day life. My dad was the life of the party, and my mom was the support system for family and friends alike. Together, they created a loving home for all of us who were lucky enough to be around them.

Industries Served