After the August Revolution of 1945, he was sent to work in the Provisional Party Committee in the South and became the Secretary of the Southern Party Committee (1946) and Deputy Director of the Southern Public Security Department (1947).

Photo: Comrade Phạm Hùng- Deputy Director of the Southern Public Security Department, 1948

Comrade Phạm Hùng (the 3rd person as seen from the left), has a group photo taken with the delegates of the 5th National Public Security Conference in 1950

After the North was liberated, Mr. Phạm Hùng held the position of Politburo member, Secretary of the Party Central Committee, Head of the Central Committee for Unification, Deputy Prime Minister; He also participated in drawing up and finalizing the draft project on the peace and reunification of the nation, and on revolution in the South. In 1967, he was assigned by the Party to be the Secretary of the Central Bureau of the Southern Department and the Political Commissar of the Armed Forces for the Liberation of South Vietnam.

Photo: President Hồ Chí Minh and comrades Trường Chinh, Lê Duẩn, Phạm Hùng (first person from the left) at the 4th Session, 2nd National Assembly, April 1962

In April 1975, the Politburo decided to launch a Campaign called Hồ Chí Minh, to liberate Saigon, appointing comrade Văn Tiến Dũng as Commander, Comrade Phạm Hùng as Political Commissar of Operation Command.
On April 8, 1975, the Central Bureau held a meeting attended by officers of the Regional Military Commission, the B2 Command and the General Staff. At the meeting, Mr. Phạm Hùng affirmed:
“It's time to liberate the South! This is a great joint operation to complete the democratic national revolution throughout the whole country. Since the Party was founded, this time is the most glorious moment in history. Previously, Quang Trung fought the invaders, his army marched quickly, but they would have to be stationed somewhere. Today, the Northern corps coordinate with forces where they are in the South, so they don't have to stop anywhere and achieve many great victories.”

Photo: Members of Command post of Hồ Chí Minh Campaign, April 1975: General Văn Tiến Dũng - Commander, comrade Phạm Hùng - Political Commissar, comrade Lê Đức Thọ - Representative of Central Committee of Party

Sáng 30/4/1975, khi nghe tin Tổng thống Sài Gòn đề nghị với phía cách mạng ngừng bắn để thương lượng, Chính ủy Phạm Hùng đã ký và cho phát ngay bức điện hỏa tốc gửi các đơn vị trên chiến trường:
“Địch đang dao động tan rã. Các cánh quân hãy đánh mạnh, tiến nhanh chiếm các mục tiêu đúng quy định. Hội quân tại Dinh Độc lập ngụy. Địch không còn có gì để thương lượng bàn giao. Chúng phải đầu hàng vô điều kiện. Tiến lên! Toàn thắng!”

Photo: Comrade Phạm Hùng (2nd person as seen from the right) and comrades in the Hồ Chí Minh Campaign Command, the photo was taken after the liberation day of Sài Gòn - Gia Định, 1975
Source: VNA

Comrade Phạm Hùng - Member of the Politburo, Secretary of the Southern Party Committee (2nd person as seen from the right) received President Tôn Đức Thắng at Tân Sơn Nhất Airport, May 13, 1975

Chairman Nguyễn Hữu Thọ, Senior Lieutenant-General Trần Văn Trà and Comrade Phạm Hùng expressed their deep happiness at the victory, Saigon, May 15, 1975