Rajab was born in New South Wales, Australia. He is Muslim and of Lebanese descent.[2] Rajab played his junior football for Bankstown Sports, whom he joined as a four-year-old.[3] Rajab graduated from Al Noori Muslim School in Greenacre in 2019.
Rajab made his international debut against Ireland in 42–18 victory for Lebanon.[citation needed]
Rajab's impressive form on the international stage attracted considerable attention from Phil Gould and rugby league commentators, with Gould declaring on Twitter "I'm sure he will debut next year, probably at 7".[3] Rajab said in response to the attention: "I heard about that tweet. Some of my mates sent it to me saying, ‘Look what Gus said about you’. I was shocked, I thought, ‘No way’," Rajab told The Daily Telegraph.[clarification needed] "As a kid this is what you dream of. "For Gus to even mention I might have a chance to play NRL, I’m grateful. It makes me want to work harder to get that shot."[citation needed]
Rajab was included in the Top 30 for the 2023 season.[citation needed]
2023
Rajab began the NSW Cup season with 11 appearances, six try assists and three tries guiding the Bulldog's reserve grade squad to the top of the ladder.
After beginning the season in Ron Massey Cup, Rajab signed with the Newtown club and made his debut in NSW Cup round 9 against St. George Illawarra, winning 26-10. On 29 September, Rajab played for Newtown in their 2024 NSW Cup Grand Final victory over North Sydney.[8]