Complex sentence: He joined the Indian Civil Service in 1871, serving in the Central Provinces for nearly thirty years, during which he rose to be the Chief Commissioner of Central Provinces in 1899 followed by President of Police Commission in 1902.
Split into simpler sentences: He joined the Indian Civil Service in 1871, serving in the Central Provinces for nearly thirty years. During his service he rose to be the Chief Commissioner of Central Provinces in 1899 followed by President of Police Commission in 1902.