J.J. O'Connor is the President of Green Oak Financial Services, a financial services practice with a primary focus on tax consulting. During his 20 years of experience, J.J. has worked on tax planning, research, auditing, financial modeling, computer programming, and has provided financial advice for some of the most reputable accounting and financial companies in the world.

J.J. began his career at Arthur Andersen where he worked on auditing financial statements for major financial companies and hedge funds. He also worked in structured finance where he built complex financial models as well as computer programs.

J.J. continued his career at Ernst & Young before moving on to become an investment professional with Assured Guaranty and Allianz Risk Transfer, where he focused on analyzing and monitoring investments across the structured finance and alternative investment fields.

J.J. received his Bachelor of Science, in Economics and Accounting from the College of the Holy Cross and his Master of Business Administration in Finance from the Stern School of Business, New York University. He is also a Certified Public Accountant. J.J. volunteers with Ecuador Quilt, a non-profit organization which provides medical and housing supplies to underprivileged people in Ecuador as well as Dorchester Youth Soccer.




Kate Finn, CPA is the newest partner at Green Oak Financial.  Kate has been a CPA since 2002.  After graduating from UMass Amherst’s Isenberg School of Management, she worked for a CPA firm in Boston, where she developed an interest in accounting and tax issues for non-profit organizations.  Her career path has led her to specialize in non-profits and small business start-ups; she is experienced in their unique challenges.  Kate provides a range of financial services to these organizations including:

-       monthly bookkeeping 

-       interim finance department duties

-       outsourced CFO services

-       tax planning and preparation






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