Semyon Sidorchuk was born in Kobirn, Grodno Province, on September 1, 1882. In 1907 he graduated with excellent academic results from the St Petersburg Civil Engineering Institute. Two years later he landed a job at the Palace Administration of Tsarskoe Selo, where his design projects included a shooting ground for the Life-Guards Hussar Regiment, a biological purification plant (together with Silvio Dagnini) and other structures. In 1910-11 he was on the Tsarskoe Selo Centenary Celebrations Committee.
In 1913-17 Sidorchuk was commissioned by Emperor Nicholas II to build the Sovereign’s Martial Chamber in the Alexander Park for housing a museum of Russian war history, which became the Great War Museum after the First World War broke through.
During the war he designed the Church of the icon of “Our Lady Soothe My Sorrow” (built in 1915, dismantled in 1938) for the Common Cemetery of WWI victims, as well as army barracks and military hospitals.
Sidorchuck lived and worked in Poland in the 1920s-1930s. He held the post of Brest’s city architect in 1925-28. Among his designs were residential and civic buildings in Kobrin, Brest, Rovno and Kovel.