Article from August 22, 2012:
"This brand new, 50,000 square foot hangar with the eye-catching red roof belongs to Millard Air, formerly of Toronto’s Pearson International Airport. The company will bring up to 90 jobs to the Kitchener-Waterloo area."
"Millard Air will employ 40 to 90 people and will provide heavy aircraft maintenance, beginning with Boeing 737s and eventually progressing to Airbus A320s and Boeing 757s. The company is awaiting its AMO (approved maintenance organization) certification from Transport Canada, but (Wayne) Millard hopes to be up and running by the beginning of November."
http://skiesmag.com/news/articles/17044-built-for-bigger.html
I gather when WM unexpectedly passed away (3 months later in Dec, 2012) the business plans were scuppered and management looked to lease out the facility.