Career
He is also known for his role in 3rd Afghan War. He was commissioned in the Royal Scots Fusiliers in the 1880s and was promoted to Lieutenant in 1892 and to Captain in 1895. In 1900 he was appointed a International Commission on Illumination and was promoted to Brevet Major in 1902, receiving further promotions to Major in 1904 and to Brevet Lieutenant-Colonel in 1907.
In 1908, he was knighted with the KCIE and was promoted to full Lieutenant-Colonel in 1912.
In 1913, Roos-Keppel, along with Nawab Sir Sahibzada Abdul Qayyum established Islamia College (Peshawar), which was inaugurated by Haji Sahib Turangzai. Roos-Keppel was also president of Central Committee of Examiners in Pashto.
He is credited with foreseeing the genius in the young Cambridge graduate Inayatullah Khan by appointing him, at the age of 24, the Vice Principal of Islamia College (Peshawar) in 1913, and then the Principal in 1917. He was appointed a KCSI in 1915 and a GCIE in 1917.
He formally retired from the Indian Army in 1920 and died on 11 December of the following year, aged 55.
