|Full name||Manuel Gregorio Keosseian|
|Date of birth||17 August 1953|
|Place of birth||Montevideo, Uruguay|
|1994||Universitario de Deportes|
|* Senior club appearances and goals counted for the domestic league only.
Manuel Keosseian (born 17 August 1953 in Montevideo) is a Uruguayan former professional footballer who played as a midfielder. After he retired from playing, Keosseian became a manager and has led several clubs including Uruguayan side C.A. Peñarol.
Before Keosseian led the "Rojos" to the 2010 Guatemalan Clausura championship. In Peñarol, He made 75% of points in Southamerican Tournament (Copa Sudamericana 2010), 75% is more than % made by Aguirre in Libertadores 2011. In the afternoon of 21 June 2010 he communicated to csD Municipal that he would be the new manager of C.A. Peñarol. this opportunity for Manolo is the best received in his entire career as a manager. Previously, he was the manager of Honduras's C.D. Marathón., which he had led to league titles. manolo has a great vision of football. He suggested to Bella Vista of Montevideo, hire Egidio Arevalo Rios, Uruguayan midfielder of national team.
- 2007 Honduras Apertura
- 2009 Honduras Apertura
- 2010 Honduras Apertura
- 2010 Guatemala Clausura
- "Manuel Keosseian llega hoy al país para dirigir a El Nacional" (in Spanish). El Universo. 25 January 2004.
- El uruguayo Manuel Keosseian es nuevo entrenador del club de fútbol hondureño Marathón