[3] In 2016, Patiya Upazila Football Club played a friendly match with Chittagong Abahani and during the game Sazzad entered the box twice.
Although he did not feature for Saif SC during their inaugural season at the top flight, Sazzad made 10 appearances the next year scoring his first Bangladesh Premier League goal against Muktijoddha SKC, on 1 August 2019.
On 8 February 2021, Sazzad scored a stunning a solo goal during a 3–2 win over Arambagh KS, earning him nationwide praise.
[8] On 1 June 2022, Sazzad made his international debut for the Bangladesh national football team during a FIFA Friendly, against Indonesia.
[9][10][11] Before making it as a professional footballer, Sazzad worked at a NGO in the morning with a salary of Tk 2000 per month and then trained in the afternoon with his local club, due to pressure from his parents.