Sonosky Chambers Sachse Endreson & Perry, LLP

Sonosky Chambers Sachse Endreson & Perry, LLP is a national law firm based in Washington, D.C., dedicated to representing Native American interests across a broad spectrum of legal challenges.

For nearly five decades – since our founding in 1976 – we have focused exclusively on advocating for the rights and sovereignty of Indian tribes and tribal organizations. Our team of experienced attorneys provides comprehensive legal support, encompassing litigation, lobbying, economic development, healthcare, self-determination, and more.

We distinguish ourselves through a deeply rooted commitment to tribal communities, a strategic approach to complex legal matters, and a proven track record of achieving favorable outcomes for our clients. We turn down opportunities that would divert our focus from serving the interests of tribes, ensuring our expertise remains dedicated to their advancement.

Sonosky Chambers represents tribes in major Indian law litigation, complex financial transactions, and negotiations with government agencies – consistently delivering results that protect and expand tribal rights. We are proud to be a trusted partner in preserving tribal sovereignty and fostering self-governance.