Al Ahly After retiring, El Nahhas began his coaching career as assistant football director at Al Ahly for the 2009–10 season. He then became vice president of the youth sector before resigning in May 2014.
Al-Merrikh SC In 2010, he took on the role of sporting director at
Al-Merrikh SC, a position he held for one year.
Aswan SC El Nahhas took his first managerial position in July 2014 with
Aswan SC, then in the Egyptian Second Division. In the 2014–15 season, he led the team to promotion to the Premier League after an 11-year absence. Aswan finished 15th in the top tier the following season, avoiding relegation by 10 points. However, a poor start to the 2016–17 season led to his resignation in November 2016.
El Sharkia SC On 8 February 2017, El Nahhas was appointed head coach of
El Sharkia SC. After 17 games and a series of poor results, he left the position on 31 July 2017.
El Raja SC He took over as head coach of
El Raja SC on 28 September 2017, replacing Khaled Al-Qashmakh. El Nahhas was dismissed on 24 December 2017 due to poor results, with the team bottom of the league table.
Tanta SC El Nahhas became the coach of
Tanta SC on 1 March 2018. After only seven games and a disappointing run, he left on 27 April 2018.
Al Mokawloon Al Arab SC He took charge of
Al Mokawloon Al Arab SC on 24 October 2018, succeeding Alaa Nabil. He resigned from the role on 29 December 2021.
Tala'ea El Gaish SC On 9 February 2023, El Nahhas was appointed head coach of
Tala'ea El Gaish SC during the latter stages of the 2022–23 season.
Al Ahly In April 2025, El Nahhas returned to
Al Ahly SC as interim coach, guiding the team to their 45th Egyptian Premier League title at the end of the
2024–25 season. In September that year, he was reappointed as interim head coach following the dismissal of
José Riveiro. ==Managerial statistics==