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Meet Our Team of Tax Experts

Our team of tax attorneys in Boston offers decades of experience representing individuals and businesses with tax-related issues. Many of our senior professionals have experience working at the IRS, and we are the ones to call when the IRS comes knocking!

Services Offered by Our Team of Tax Lawyers in Boston

Our skilled tax lawyers in Boston can be hired to represent and defend individuals, estates, and businesses with matter involving the IRS and state tax matters. Some of the comprehensive services our professionals provide include the following:

  • Audits & Examinations
  • Tax Litigation
  • Offers in Compromise
  • Voluntary Disclosure
  • Tax Appeals
  • And More

Meet our team of skilled tax attorneys and professionals and discover what sets our firm apart from others in Boston!

Sean McMahon

D. Sean McMahon, Esq.


Former Senior Attorney for the Internal Revenue Service (IRS) Office of Chief Counsel and former Special Assistant United States Attorney for Massachusetts and New Hampshire.

Ryan Tivnan

Ryan Tivnan, Esq.


Senior Attorney representing individuals, estates, and businesses with civil tax controversy, tax litigation, and foreign disclosures and compliance.

Maryna Sticksel

Maryna Sticksel, Esq.


University of Iowa Law School graduate representing individuals, estates, and businesses.

Katy Witham

Kathryn Warner, Esq.


Suffolk University Law School graduate representing individuals, estates, and businesses.

Gerry Ouellette

Gerald D. Ouellette


36-year veteran of the IRS working as an Appeals Team Case Leader, mediator, and international specialist.