Stefano Filippi is an independent researcher in foundational physics and classical electrodynamics. His work concerns the algebraic representation of fields through quaternion formalism, local energy conservation in non-transverse regimes, and the analysis of scalar potential transport channels within the Lorenz gauge framework. Drawing on quantum-mechanical linear response theory, this research connects classical electrodynamic description to experimental microstructure response, and is published as a coordinated series of preprints and technical notes on Zenodo.
He received his degree in Electronic Engineering from the University of Pisa in 1993, specialising in microelectronics.
His industrial career began at Siemens in 1995, during the launch of a new manufacturing plant at Fauglia, near Pisa. He was responsible for quality control in injector component manufacturing, and later managed an injector assembly line with a team of ten to fifteen. In this period he introduced statistical process control methods supported by dedicated automatic gauging equipment, anticipating the Six Sigma practices that would become standard across the industry.
In 2009 he moved to the engineering group, where his work centred on injector design in combination with electronic control requirements, including physical feedback methods for optimising closing behaviour. He was named injector technical expert for the Pisa site in 2015, and now works in production engineering support, acting as a bridge between design, manufacturing, and customer quality. He is author or co-author of several tens of international patent filings in the injector field.
