[2] Traveling in Iran, Siroux meticulously measured the ruins of caravanserais and other ancient structures, preserving their legacy for future generations.
In 2023, when Iran sought UNESCO registration for Iranian caravanserais as world heritage sites, they relied extensively on Siroux's publications to substantiate their claim of the enduring originality and scholarly value of his works.
Siroux designed the Hakim Nezami School in Qom with stone and brick while retaining the forms and methods of Iranian historical architecture.
His tenure spanned four years, until Godard decided to appoint Houshang Saanei, a recent graduate and Siroux's student, to replace him.
As the architect of the Ministry of Education, he personally designed plans for the restoration of the semi-ruined Safavid Fin Garden near Kashan, suggesting he had deep knowledge of Iran's historical architecture.
Siroux left Iran in 1945, but he returned in 1958 to undertake the preservation of the Caravanserai Madare Shah along with Iranian architects, artists, and builders including Ebrahimian, Chaychi, Rashtian, Meraatian, and many others.