Saliba was born at Fairfield Hospital on 24 April 1985, and was raised in a public housing estate in Cabramatta.

[2] David then completed a Graduate Diploma in Legal Practice (awarded with Distinction) and was admitted as a lawyer in New South Wales.

[2] He worked in multi-agency teams combatting organised crime, corruption, and drug importations.

[3] David was awarded two AFP Commissioner’s Group Citations for Conspicuous Conduct for operations relating to terrorism, organised crime and corruption.

[5] He ran a mentoring program for young refugee students settling into Australia, the Say "No" to Crime Forum to help young people stay away from crime,[6] HSC study sessions to help students enter university,[5] and an online advice service for high school students about life after high school[7] as well as assisting with resume drafting and job interviews.