[3] He was part of the 34-member committee formed in 1972 to formulate the draft Constitution of Bangladesh.

[3] He was designated as the governor of Pabna district by Sheikh Mujibur Rahman in 1975.

[1][5] In 2013, Sayeed was conferred a PhD degree by Rajshahi University for his thesis titled "Independence of Bangladesh: Diplomatic War".

[3] In January 2014, Sayeed lost as an independent candidate to Shamsul Haque Tuku in the general election from the Pabna-1 constituency.

[6] In November 2018, Sayeed left the Awami League and joined Gano Forum to contest the upcoming election from Pabna-1 as a candidate of the Jatiya Oikya Front.