ASHRAE - London Ontario Chapter
- The unofficial site of The American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. presents information about the chapter's activities, professional engagements and featured speakers.
- http://londoncanada.ashraechapters.org/

The London Executives Association
- A group of London business people whose common goal is to serve one anothers' business interests for mutual benefit.
- http://www.londonexecutives.com/

London Community Small Business Centre
- A non-profit organization providing entrepreneurs with support services necessary to starting and successfully building their small businesses.
- http://www.sbcentre.ca/

London Chamber of Commerce
- The Chamber is London's largest and most broadly-based business organization, with over 900 member firms employing nearly 50,000 people in London and area.
- http://www.londonchamber.com/