[4] A year before completing his studies, Genaro started a work/study program at the offices of Henry Dreyfuss and he remained with the firm after graduation.

Throughout his career Genaro oversaw product development, ergonomic, graphic and architectural/interior design projects for AT&T,[5] Bell Labs, John Deere, Polaroid, Singer Corporation, American Standard and Bankers Trust, among others.

After retirement, he assumed the role of Chairman of the Board of Directors of Pascack Valley Hospital in Westwood, New Jersey.

In 1985, The New York Times described Genaro as "one of a small but growing fraternity that decides the shapes, sizes and colors of everyday products—pens and stoves, belt buckles and cars".

[3] His designed have obtained awards from professional organizations and publications, as well as coverage in Fortune,[7] Business Week, Time[8] and Advertising Age.