[5] Describing his time as Jaspert's assistant, Marmar stated that he "felt like a partner", which was "what made [him] want to become a coach".

[6] After winning the league, Marmar went back to coaching Ahed's youth side, citing difficulties with the players as the main reason.

"[5] That season, Marmar helped Ahed win the domestic double, lifting both the league and FA Cup titles.

[10] On 25 July 2020, after being involved with Ahed for 24 years as a player and as a manager,[11] Marmar was hired as head coach of Kuwait Premier League club Al-Arabi.

[14] In Marmar's first game he helped Al-Arabi win 4–1 against Burgan on 10 September, in the quarter-finals of the 2019–20 Kuwait Crown Prince Cup.

[18] On 19 January 2021, ahead of the second leg of the 2020–21 season, Ahed announced that Marmar had returned as head coach.

[19] Upon his return, Marmar helped Ahed lift the league title[20] and the 2022 Lebanese Elite Cup.

[23] On 13 September 2023, Safa announced the appointment of Marmar as their new head coach, replacing Jan de Jonge who left for personal reasons.

[24] Marmar was born on 28 March 1977 in Khobar, Saudi Arabia,[2][1] to Lebanese parents; his family is originally from Tayibe, Lebanon.