Mariah S. Sixkiller is an Executive at Hakluyt and Co where she draws on more than two decades of experience in the public and private sectors to help clients navigate complex markets and geopolitical challenges.  

Mariah’s public service includes roles in both the legislative and executive branches.  She served as National Security Advisor to then-House Majority Leader Steny Hoyer (D-MD), Foreign Policy Legislative Assistant to Sen. Paul Sarbanes (D-MD), and Director of Research for Sen. Maria Cantwell (D-WA).  Earlier in her career, she was a political appointee in the Clinton White House, serving at the Office of Management and Budget.  

Most recently, Mariah was General Manager for Strategic Defense Affairs at Microsoft following her time on the company’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.

Mariah is a member of Women in Military Service for America Memorial Foundation Board and a National Defense Strategy Commissioner.

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