A member of the Nova Scotia Liberal Party, she represented the electoral district of Halifax Armdale until 2021.
She is the recipient of the "Outstanding Professional of the Year" award (2010) from the Canadian Lebanese Chamber of Commerce and Industry.
[11][12] On October 13, 2020, premier Stephen McNeil shuffled his cabinet in response to the resignation of three Ministers who entered the leadership race to replace him.
[14] In January 2017, Diab's husband Maroun was charged with assault, uttering threats and choking his wife, as well as threatening two other people in relation to an incident that occurred at their home in Halifax on December 31, 2016.
[1] On March 23, 2017, her husband was found not criminally responsible for the incident after an assessment at the East Coast Forensic Hospital.