Gail Dennise Thomas Mathieu (born 1951)[1] is the former political advisor to the Commander, United States Transportation Command, Scott Air Force Base, Illinois.

She is the former United States Ambassador to Namibia and former United States Ambassador to Niger.

[2][3] Mathieu is a native of New Jersey, but earned a B.A.

She returned to New Jersey and earned her J.D.

[3] She was initially an assistant prosecutor for the city of Newark, New Jersey, but then began a career in the Foreign Service.