Joao Hugo Eduardo de Sequeira (20 April 1915 – 17 October 1989), popularly known as Dr.
Jack de Sequeira; also known as Jak Siker according to local naming conventions, was a prominent Goan politician and is popularly known in Goa as the Father of the Opinion Poll.
The father of the Opinion Poll laid the foundation for Goa's Statehood.
Chief Minister Laxmikant Parsekar and the Department of Posts released a special cover on Dr Jack de Sequeira on the occasion of Goa Statehood Day (30 May 2015).
Speaking about Dr Sequeira, the Chief Minister said, "Sequeira fought to keep Goa as a separate entity with a unique identity." Parsekar further went on to say, "He brought in referendum to determine whether Goa should be merged with Maharashtra or not.
It is only because of him that Goa got statehood on 30 May 1987.Dr.
Jack de Sequeira was the founder president of the United Goans Party.
He played a pivotal role in convincing the government of India to hold an opinion poll to decide the issue of the merger of Goa into the state of Maharashtra.