He is a founding member of the political pressure group Time4Change,[2] which was formed in the response to the revelations, in early 2008, that systemic child abuse had occurred in a local care home during the 1960s–1980s.

He has served on the Education and Home Affairs Scrutiny Panel between 2008 – 2013 and is currently the vice-chairman of the Privileges and Procedures Committee.

[3] Montfort Tadier was re-elected during the 2018 electoral campaign as Deputy for St Brelade District No.

[4] After the 2018 election Deputy Montfort Tadier was suspended from ministerial duties on 29 March 2019 because "the evening of 28 March, the Assistant Minister for Economic Development, Tourism, Sport and Culture (Deputy Montfort Tadier), sent an email to a number of States Members, calling for a Government employee to be “removed from States Employment” and suggesting that a number of Members “back a proposition to this effect”.

[5] The Deputy copied the named employee into this email and was subsequently deemed have broken the Ministerial Code of Conduct by the Chief Minister, Senator John Le Fondré.