Marissa K. Flannery (Tohono O'odham Nation) joined the Sonosky Chambers law firm in 2000, and became a Partner of the firm in 2008. Ms. Flannery is engaged in all areas of the firm's Indian law and tribal health care law practice. Ms. Flannery advises and represents tribes, tribal organizations, regional and village corporations on a wide range of matters including regulatory compliance, employment matters, commercial transactions, and Indian Self-Determination Education and Assistance Act contracts, compacts and funding agreements.

In addition, for a number of years Ms. Flannery has advised tribal heatlh providers on all aspects of their health care operations, including Medicare and Medicaid compliance matters, employment, privacy issues and health care related litigation. Ms. Flannery has also litigated on behalf of tribes before state and federal courts, including the Alaska Supreme Court.

Ms. Flannery received her B.A. in American Studies with honors from Stanford University, and her J.D from Stanford University School of Law. Before joining the firm, Ms. Flannery worked as a legislative intern for the Mashantucket Pequot Tribal Nation, and was a summer law clerk for the Senate Committee on Indian Affairs and the National Indian Gaming Commission.