Immediately after the military post occupied by American soldiers was vacated, it was turned over to the provincial government for the use of the Pasig Secondary School in November 1903.

For many years since its establishment in 1902, the intermediate classes were under the supervision and administration of the secondary school principal.

The first Filipino principal was Marcelino Bautista who served during the school year 1929–1930, followed by Ricardo Castro in 1930–1935, Aquilino Carino in 1935–1936, Eufrocino Malonzo in 1936–1939.

The years preceding the Second World War saw Eliseo Tayao as principal of the Rizal High School (1939–1941).

The carpet-bombing employed by the American Liberation Forces destroyed the high school building and grounds.

He took charge of the administration of the Rizal High School for about a month when he gave way to Cesario Bandong who served as principal until 1950.

The reconstruction of the Rizal High School was started on February 4, 1948, out of the War Damage Fund in the amount of PHP101,445.49 during the incumbency of Governor Doctor Sixto Antonio.

Josephine M. Cruz, who was then the Schools Division English Supervisor for the secondary level, was installed as Santos' replacement in 1999.

[4] In July 2022, the Department of Environment and Natural Resources and Pasig LGU officials led the declaration ceremony, including the installation of a historical markers on 2 acacia as heritage trees in RHS.

Metro Manila's 36th and 37th heritage trees are believed to have been planted before 1902, as it is fondly called by teachers and students as 'Batibot'.