He received his Doctor of Philosophy from Stanford University in 1955. His Doctor of Philosophy adviser was Frederic Columbus Blake. From 1922-1924 he worked at the North Electric Manufacturing Company of Galion, Ohio, on telephony switchboards, then studied electrical engineering at the University of Michigan where he received his Master of Arts He then joined Ohio State University (Ohio State University) as assistant professor, becoming associate professor (1929) and full professor (1933) when he received that institution"s Doctor of Philosophy under Frederic Blake.
He was adviser of numerous outstanding scientists in Stanford University including Karl Spangenberg, and Nelson Wax. From 1918-1919 he served in the United States Marine Corps, then joined Cornell University to study electrical engineering where he received his Electrical Engineer degree in 1922. in 1926. His dissertation was entitled The Calculation and Design of Alternating Current Networks Employing Triodes Operating During a Portion of a Cycle.
While at Ohio State University he developed the theory of Class B and Class C electronic amplifiers.
He was then professor of electrical engineering and head of department at the University of Illinois at Urbana-Champaign (1944-1949) and dean (1949-1968). The Electrical Engineering Laboratory there bears his name.
In his long career, Everitt was a radar pioneer and author of basic texts on radio engineering and communication. He invented automatic telephone equipment, a "time compressor" to accelerate recorded speech, high-power radio amplification, a frequency modulation radio altimeter, and several antenna matching and feeding systems
His textbook Communications Engineering, first published in 1932, was a classic in the field
Everitt was also a Fellow of American Institute of Electrical Engineers, and a member of the American Association for the Advancement of Science, the American Society for Engineering Education, the Acoustical Society of America, Eta Kappa Nu, the National Council of Tau Beta Pi, and Sigma Xi, and received 10 honorary doctorate degrees.