Ernst Hermann Karl Engel was a teacher of and frequent author on typography. In 1905, Engel became supervisor of in-house printing at the Gebr. Klingspor foundry. He also taught at the Frankfurt Vocational School and at the College of Arts and Crafts in Offenbach am Main. In 1921, he established his own private press, the Ernst-Engel-Presse, and designed typefaces for in-house use.