On Regional Council, he worked on transportation and environment issues and was a member of the Ottawa-Carleton Police Services Board and the OC Transpo Commission.

He served for five years on the board of directors of the Federation of Canadian Municipalities where he was involved in community safety and crime prevention issues, district energy and international development programs in Africa.

As Minister of National Defence, Pratt received cabinet support for several major procurement projects totalling $7 billion including the Maritime Helicopter Program (Sikorsky CH-148 Cyclone) to replace the aging Sikorsky CH-124 Sea King fleet, the M1128 mobile gun system (later cancelled) and a new fixed wing search and rescue aircraft to replace the CH-115 and C-130H Herįcules (CC-295).

Under his leadership, the defence committee released a report entitled: "Facing Our Responsibilities: The state of readiness of the Canadian Forces" which called for substantial new investments in Canada's military capabilities.

There were also meetings and consultations with other senior officials and diplomatic representatives including Revolutionary United Front leader Foday Sankoh.

In the 2004 federal election, he lost his seat to Conservative Party of Canada candidate Pierre Poilievre, forcing his departure as Defence Minister three weeks later.

[5] In July 2008, Pratt left the Canadian Red Cross and ran as the Liberal candidate in the riding of Ottawa West—Nepean where he faced incumbent minister John Baird.

The explosion, which occurred in the Red Zone in Baghdad, caused significant vehicle damage and blew out windows in the surrounding area, but no one was hurt.

In October 2014, Pratt was inducted into the Order of St George, the Canadian priory, which traces its roots back to King Kàroly Robert of Hungary in 1326.

[citation needed] He has authored several papers and lectures including: "Re-tooling for New Challenges: Parliaments as Peace-builders",[8] (June 2005), "Is There a Grand Strategy in Canadian Foreign Policy"[9] Ellis Lectures, University of Calgary, Centre for Military and Strategic Studies, (12–14 June 2007) and "Canadian Grand Strategy and Lessons Learned" (April 2008), Journal of Transatlantic Studies,[10] United Kingdom).

In October 2018, Pratt participated in the Oxford Union debates and spoke in favour of the proposition act "The War on Terror has been its own worst enemy".