[2] Prior to his election, Maloney worked as a litigation lawyer with Hughes Amys LLP having been called to the Ontario Bar in 1996.

[5] He was involved in a number of significant cases including the tainted blood scandal of the 1980s and the Elliot Lake Commission of Inquiry.

[8] In addition to his role in several international parliamentary associations, Maloney is a member of the House of Commons Special Joint Committee on Medical Assistance in Dying.

Metrolinx warned that if homes were built in the area, noise complaints from residents could force the Willowbrook Rail Maintenance Facility to close.

In January 2020, Maloney introduced a Private member's motion proposing to declare March as Irish Heritage Month.

The report has been criticized by MPs both within and outside of Maloney's own Liberal party, most notably Conservative MP Scott Reid, who released a blog post calling the report and process behind it “vindictive”, and criticizing the appropriateness of forcing Maloney to publicly apologize for a mistake made in good faith and corrected immediately.

[14] Maloney was born in Thunder Bay and has lived in Etobicoke most of his life, attending Michael Power High School.