Erickson worked for the
Australian Council of Trade Unions (ACTU) in research and data. In 2014, he took up the position as
assistant national secretary of the
Australian Labor Party. He has also worked in the New South Wales and Victorian state governments, advising several Labor ministers including
Peter Batchelor,
Richard Wynne and
Carmel Tebbutt. Following the resignation of
Noah Carroll in 2019, Erickson was appointed acting national secretary and was appointed to the role permanently on 16 August 2019. Erickson is a member of the left faction, and served as convenor of the Socialist Left in Victoria in 2010. In 2024, he was publicly touted by
Labor Left allies as a potential candidate for the
Australian Senate to
fill the vacancy created following the death of
Linda White. However, he declined the opportunity. Following the 2025 election victory, he denied further speculation he intended to enter parliament soon and noted his intention to re-nominate as party secretary at the next
Australian Labor Party National Conference. Erickson was afforded the number one spot on the
"10 most covertly powerful people list" for 2025 published by
The Australian Financial Review. ==Personal life==