From 1978 to 1986, he was with General Electric, initially with the Valley Forge Space Division, then with the Syracuse Electronics Laboratory. During this time, he developed microwave design and measurement software and designed microwave circuits on alumina and on GaAs. From 1986 to 1988, he was a Visiting Professor with Syracuse University and Cornell University. In 1988, he took Sonnet Software full time, a company he had founded in 1983. In 1995, Sonnet Software was listed on the Inc. 500 list of the fastest growing privately held U.S. companies, the first microwave software company ever to be so listed. Today, Sonnet Software is the leading vendor of high accuracy three-dimensional planar high-frequency electromagnetic analysis software (based on Maxwell’s equations).
Dr. Rautio was the recipient of the 2001 IEEE Microwave Theory and Techniques Society (IEEE MTT-S) Microwave Application Award, 2014 Distinguished Service Award, and 2019 Career Award. He was appointed MTT Distinguished Microwave Lecturer for 2005 – 2007 lecturing on the life of James Clerk Maxwell and has had major influence in the restoration of Clerk Maxwell’s home, Glenlair. He is also a Trustee of the James Clerk Maxwell Foundation, which promotes Maxwell and maintains Maxwell’s birthplace in Edinburgh as a museum of his life. He is a Fellow of the IEEE and the RSE.