Dr. Engelmann was admitted to the Connecticut Bar in 1975, and is registered to practice before the U.S. Patent and Trademark Office.

He earned a Bachelor of Arts degree in Chemistry from the University of Wisconsin Milwaukee in 1964. He also earned a PhD degree from the University of Illinois in 1970, with a major in Organic Chemistry and a minor in Analytical Chemistry. He earned a Juris Doctorate in 1974 from University of Illinois.  He received a Post Doctoral Fellowship at the State University of New York, Buffalo, 1970.

He is the co-author of "Benzoylation of the Sodium Salt of 6(5H)-Phenanthridinon and an O-to-N Benzoyl Migration"; Tetrahedron Letters No. 36, pp. 3911-3913, 1968; "The ENDOR Spectrum of bis(p-methoxyphenyl) Nitroxide"Molecular Physics 20, 569 (1971); "Intramolecular Oxygen-Nitrogen Benzoyl Migration of 6-Aroyloxyphenanthridines" Journal of Organic Chemistry 37, 3439 (1972); "Picric acid: C6H3N3O7," Duesler, E. N.; Engelmann, J. H.; Curtin, D. Y.; Paul, I. C. Cryst. Struct. Commun.1978, 7, 449-453.

He has patent experience in the pharmaceutical industry with Pfizer and Eli Lilly, as well as experience with specialty and industrial chemicals.

Professional memberships include the American Bar Association; the American Chemical Society; The American Association for the Advancement of Science; the American Intellectual Property Law Association, and the Intellectual Property Owners Association.