Ernst Adolph Guillemin (May 8, 1898 – April 1, 1970) was an American electrical engineer and computer scientist at the Massachusetts Institute of Technology who spent his career extending the art and science of linear network analysis and synthesis.
In 1960, he was appointed to the MIT Edwin Sibley Webster Chair of Electrical Engineering, a title he held until his retirement in 1963.
In this effort, he revised and expanded a subject that included communication transmission lines, telephone repeaters, balancing networks, and filter theory.
Thus began his lifelong career of developing and refining linear, lumped, finite, passive, and bilateral networks in the sphere of teaching.
He took over administrative responsibility of the Communications Option in the MIT Department of Electrical Engineering, in 1941.