Commissioner Bio

Mariah Sixkiller

Mariah S. Sixkiller is an Executive at Hakluyt and Co, a strategic advisory firm that helps clients navigate complex markets and geopolitical challenges. Prior to joining Hakluyt in 2023, Mariah was General Manager for Strategic Defense Affairs at Microsoft and, before that, a director on Microsoft’s National Security Government Relations team. Before these roles, Mariah led the national security practice at Sixkiller Consulting for seven years, where she developed public policy strategies for private and non-profit clients in the defense, tech, energy, veterans, and international exchange sectors. Before joining the private sector, Mariah worked for several Members of Congress, including as then-Majority Leader Steny Hoyer’s (D-MD) National Security Advisor from 2006-2014, as a foreign policy legislative assistant to Senator Paul Sarbanes (D-MD), and as Senator Maria Cantwell’s (D-WA) Director of Research. Earlier in her career, she was a political appointee in the Clinton White House, serving at the Office of Management and Budget. She is a member of two non-profit boards – the Women in Military Service for America Memorial Foundation and the Leadership Council for Women in National Security.