Maza got her Bachelor of Science in Business Economics degree from University of the Philippines Diliman in 1978.

[4] Maza has authored 18 bills and 24 resolutions as a Bayan Muna representative to the 12th Congress.

As a representative of Gabriela Women's Party, she has authored 53 bills and 120 resolutions at the 13th and 14th Congress.

[4] On July 8, 2015, U.S. immigration authorities barred her from entering the U.S. to participate in a left-wing conference on U.S. activities in the Philippines.

[7] On December 4, 2024, Maza and 74 others filed the second impeachment complaint against Vice President Sara Duterte, citing betrayal of public trust for her office's alleged misuse of confidential funds.