He was elected to the Hawke's Bay Regional Council in October 2019 and was previously the Member of Parliament for Tukituki from 2005 until 2017.

[2] Subsequently, he worked for Credit Suisse Financial Products as Interest Rate Risk Manager in London and Tokyo.

He held the Civil Defence, Racing and Senior Citizens portfolios, as well as associate ministerial responsibilities in local government and commerce, replacing John Carter who left to take up a High Commissioner post in the Cook Islands.

[18] On 14 December 2016, following a change to the National Party leadership, Foss announced that he would retire from politics at the 2017 general election.

The Tukituki electorate was won at the election by Lawrence Yule, who had succeeded Foss as the National Party's candidate.