He is a former councillor and leader of Haringey Borough Council, and was Chair of the Association of London Government.
- Chair, Toby Harris Associates (public affairs advice, mentoring and support)
- Non-executive Director, KMD Capital Ltd
When asked about his interests, Harris told the Wall Street Journal, "I provide GENERAL public affairs advice,", "I do not provide specific advice on how to change a particular government policy."
- Associate Parliamentary Health Group
- Tackling Terrorism All-Party Parliamentary Group, member
- Electric Infrastructure Security Council