Freddy Zemmour's from Pied-Noir one of the few French players who have decided to stay in Algeria first foreign to play with USM Alger immediately after Independence for 6 seasons in which he won one title in 1963.
On 28 May 2012, Malagasy international Carolus Andriamatsinoro joined USM Alger from Paradou AC and spent five seasons with them, during which he won six titles to be the most foreigner to achieve titles with USM Alger and in Algeria, also played 132 games and scored 20 goals to be the most appearances and the most goalscorer.
[240][241] In the 2020–21 season, USM Alger contracted with Burkinabe international Hamed Belem from Rahimo FC and Ghanaian Kwame Opoku from Asante Kotoko in a historic deal amounting to 350 thousand euros.
[245] On 9 January 2024, USM Alger announced the termination of Tumisang Orebonye's contract after disagreement with the head coach Juan Carlos Garrido as reported by many sources, The Spaniard accused his player of cheating, by faking fictitious injuries in order not to take part in matches.
[246][247] On 31 January 2024, the Cameroonian club Dynamo Douala announced the transfer of international striker Leonel Ateba for a period of two and a half years.
[248][249] On July 23, 2024, USM Alger announced the recruitment of two Congolese players from TP Mazembe, Kévin Mondeko and Glody Likonza.
[250][251] On August 27, 2024, USM Alger announced the signing of Bolivian international Adalid Terrazas for three seasons.