He played college football for the Kansas State Wildcats.

Sullivan was signed by the San Francisco 49ers as an undrafted free agent on May 14, 2021.

[2][3] On September 11, 2021, Sullivan was signed to the Kansas City Chiefs practice squad.

[5] Sullivan signed with the Birmingham Stallions of the United States Football League on September 17, 2022.

This biographical article relating to an American football linebacker born in the 1990s is a stub.