Nwamu scored a career-high 38 points and grabbed a season-high eight rebounds on March 9, 2016, in a 108-102 triple overtime win over Air Force.

[3] Nwamu was included in the training camp roster of the Sioux Falls Skyforce announced two days later.

On April 10, 2018, the Lavrio Megabolt of the Greek Basket League (GBL) had announced their signing of Nwamu for the rest of the season.

[9] On January 22, 2019, the Fort Wayne Mad Ants announced that they had acquired Nwamu and Jordan Barnett from the Wisconsin Herd in exchange for Elijah Stewart and the returning player rights to Alex Hamilton.

[13] On May 4, 2021, Nwamu lead BC Samara to the Russian Super League 1 Championship after scoring 21 points.

On August 18, 2021, he has signed with Ironi Ness Ziona of the Israeli Basketball Super League (IBSL).