Prior to Golden Age Capital, Fanis was an Associate in the Global Finance Division of Caterpillar Inc., with responsibilities spanning capital investment analysis, group-level financial analysis, and profitability assessment across multiple regions and legal entities. He was involved in the evaluation and oversight of strategic capital investments, including a global automation program across Caterpillar facilities.

Working alongside treasury, strategy, tax, and engineering teams, he supported capital allocation decisions through investment structuring, governance oversight and scalable reporting frameworks.