[3][4] In 1970, He graduated Bachelor of Science in Commerce Major in Accounting degree cum laude from the San Beda College.

[10][11] In 2007, Barzaga, under Kampi which was then part of the ruling coalition (to be known later as Lakas–Kampi–CMD),[12] was elected representative of the Second District of Cavite,[13] defeating incumbent Gilbert Remulla.

[14][7] In the House of Representatives, Barzaga served as vice chairman of the Committee on Constitutional Amendments, Local Government, and Revision of Laws and was a member of the Committees on Appropriations, Civil Service and Professional Regulation, Good Government, Human Rights, Justice, Population and Family Relations, Public Works and Highways, Science and Technology, Suffrage and Electoral Reforms, Transportation, Veteran Affairs and Welfare and the Special Committee on Southern Tagalog Development.

[15] Barzaga figured prominently on issues concerning Meralco, Sulpicio Lines, the Impeachment Complaint, and Alabang Boys.

He authored and sponsored several bills including an act converting Dasmariñas into a component city,[16] a resolution requesting an investigation into oil prices, a resolution requesting an investigation into bidding on updating the Subic Bay Freeport Zone master development plan, and a resolution requesting an investigation of environmental issues during the construction of a casino in Subic Bay Freeport Zone.

Barzaga, along with fellow provincial representatives Joseph Emilio Abaya and Jesus Crispin Remulla, authored House Bill 4254, which aimed for the congressional reapportionment of Cavite.

[22][23] At a time, he engaged his former professor on remedial law at the Far Eastern University, retired Supreme Court Associate Justice Serafin Cuevas, who was the lead defense counsel,[22] in an argument.

[34] In 2020, Barzaga was prominently featured in the hearings for the renewal of ABS-CBN's congressional franchise when he cited Wikipedia as his source of information.

[36] Barzaga, with his wife, endorsed Vice President Leni Robredo's presidential bid[37] after opposing his political party's decision to back the presidential bid of Bongbong Marcos, who was endorsed likewise by his son and incumbent city councilor, Kiko.

[32] During his tenure as district representative, Barzaga was the chairperson of the House committees on suffrage and electoral reforms (15th Congress),[40] on games and amusement (16th)[41] and on natural resources (18th and 19th).

[47] A requiem Mass was held on May 18 at the Immaculate Conception Parish Church before his burial at the Sacred Heart Memorial Gardens in Dasmariñas later that afternoon.