Shamsul Mulk (Urdu: شمس الملک), Ph.D., HI, is a Pakistani civil engineer and a Technocrat. Shamsul Mulk served as the caretaker 22nd Chief Minister of the North-West Frontier Province (now Khyber Pakhtunkhwa) under the military government of Chief of Army Staff General Pervez Musharraf. He also served as Chairman Water and Power Development Authority WAPDA of Pakistan. He was 3rd Chairperson of Board of Governors of Sustainable Development Policy Institute. He is a strong supporter for the construction of the Kalabagh Dam.

He is considered as the most hardline supporter of Kalabagh Dam.^{[citation needed]} He has indicated inter provinces prejudices as well as alleged foreign lobbies supporting anti-Kalabag dam movement in Sindh and Khyber Pakhtunkhwa.^{[citation needed]} He also argued that the worst floods in Noshera history in 1929 and 2010 flooded Noshera which denies the ANP fears of Noshera being flooded on construction of Kalabagh Dam.^{[citation needed]}