In response to overfishing and its consequences on fish stocks, Siddon attempted to impose stiff quotas on the catch.
Shortly after his swearing-in, Siddon worked alongside his provincial counterpart John Ciaccia, to address the Oka Crisis.
Siddon entered the 1993 election and ended up finishing third behind Raymond Chan of the Liberal Party and Nick Loenen of Reform.
Following his federal political career, Siddon remained active as a consultant, lecturer and corporate board member.
He speaks frequently on the political challenges of combating global climate change and the long range implications for water supply management.
Siddon was also a strong vocal opponent to the board's decision to tear down a historic auditorium and gymnasium in the local high school.
Following a successful three years on the School Board, in 2011 Siddon decided not to seek re-election, but rather ran for the position of Area 'D' Director for the Regional District of Okanagan Similkameen.