Mariana Bacil Williams is an Associate at HWS Law Group based in the Seattle office, where she represents clients in both litigation and transactional matters. Mariana brings a detail-oriented and strategic approach to each case, with a focus on practical solutions that align with her clients’ goals.

Before joining HWS, Mariana honed her litigation and advocacy skills at a boutique law firm in the Seattle area, where she worked on breach of contract, insurance coverage, and construction defect matters. Her experience includes managing complex discovery and e-discovery processes, as well as collaborating closely with expert witnesses across disciplines. Mariana practiced law in Brazil for over a decade, both in private practice and as in-house counsel for a subsidiary of a British multinational mining company. In these roles, she advised on regulatory issues, environmental compliance, contracts, labor law, and corporate governance — frequently working with multidisciplinary teams across global operations. While she brings significant experience in international law, Mariana’s ability to navigate high-stakes matters with meticulous attention and diligence enabled her to quickly establish herself in the Washington legal community, where she continues to deliver tailored legal representation.

Mariana holds a Master of Laws (LL.M.) in Global Business Law, with Honors, from the University of Washington, where she was named a Global Business Law Fellow—an honor recognizing academic excellence and leadership. Her academic background also includes an MBA in Tax Law from Fundação Getulio Vargas, a J.D. from Faculdades Milton Campos, and a B.A. in Social Communication.

Outside of the office, Mariana enjoys yoga, photography, exploring the scenic landscapes of the Pacific Northwest, and spending time with her dog, Rio.