David has worked with the following organizations:

• American Public Transit Association

• Bow Valley Regional Transit Services Commission

• Bonomi

• Canadian Urban Transit Association

• Canadian Urban Transit Research and Innovation Consortium

• Calgary Airport Authority

• Calgary Metropolitan Region Board

• Calgary Municipal Lands Corporation

• City of Airdrie

• City of Beaumont

• City of Calgary

• City of Cranbrook

• City of Edmonton

• City of Kelowna

• City of Powell River

• City of Toronto

• City of Winnipeg

• Conference Board of Canada

• CSA Group

• David Suzuki Foundation

• Halifax Regional Municipality

• Infrastructure Canada

• King County Metro

• Lime

• Melcor Developments

• Metrolinx

• Municipality of Jasper

• Province of British Columbia - Ministry of Municipal Affairs

• Province of Ontario - Ministry of Transportation

• Regional Municipality of Wood Buffalo

• Sarnia Transit

• Spin

• Strathcona County

• Toronto Transit Commission

• Town of Chestermere

• Town of Cochrane

• Town of Okotoks

• TransLink (South Coast British Columbia Transportation Authority)

• Transport Canada

• Tri Met (Tri-County Metropolitan Transportation District of Portland, Oregon)

• Uber

• York Region Transit