Quinn focuses his practice on estate, tax, and business succession planning. In his estate planning practice, Quinn advises high-net-worth individuals and their families on their most private and sensitive affairs. This includes core estate planning, designing gifting strategies, and advising on sophisticated wealth preservation techniques, all aimed at achieving his clients’ family and philanthropic goals.

Quinn also advises owners of closely-held businesses on a wide range of corporate matters, always mindful of how the business fits within a client's overall succession or exit plans. Examples include negotiating buy/sell cross-purchase agreements, planning against involuntary transfers as a result of death or divorce, and working towards involving the next generation in management of the family business.

Quinn also represents fiduciaries and beneficiaries in all aspects of estate and trust administration, including probate, preparation of estate tax returns, tax disputes, and navigating contentious fiduciary matters.

Prior to joining Mintz, Quinn specialized in international tax as an associate at a Big 4 accounting firm, was a law clerk in the trusts and estates group of a law firm, and clerked at the Massachusetts Division of Administrative Law Appeals. While earning his law degree at Boston College Law School, Quinn served as editor-in-chief of the Uniform Commercial Code Reporter-Digest.

Quinn is an Eagle Scout and is an active member of the Boston Estate Planning Council and Boston Bar Association.