After leaving university, Najwan joined the Malaysian Administrative and Diplomatic Service[2] and served as Assistant Secretary at the Ministry of Transport.

During the 13th Malaysian general election, Najwan was seen actively campaigning for PKR advisor, Anwar Ibrahim for the parliamentary seat of Permatang Pauh, Penang.

In 2018, Najwan won his first attempt in the electoral campaign in 2018 for the Selangor state seat Kota Anggerik which helped the Pakatan Harapan coalition defeated Barisan Nasional and Parti Islam Se-Malaysia.

[4] In 2011, Najwan was called by the Malaysian court as a witness for the Anwar Ibrahim's second sodomy trial due to his past relationship with Saiful Bukhari Azlan.

In an interview by BBC, Najwan had suggested that Saiful Bukhari was an implant in-order to sabotage the reputation of the former opposition leader.

During his time working with the opposition leader, Najwan was among the staff that organised and arranged Anwar Ibrahim's daily schedules and important appointments.