(written from a Production point of view)
During the the late 1980s and early 1990s he was employed at Science Fiction Modelmaking Associates (SFMA) as propmaker and has contributed to the manufacturing of the various items that company produced for the Star Trek: The Next Generation series during their season three-five run. Horch was also team member on the prestigious assignment of the eleven-foot Constitution-class studio model restoration for the Star Trek Smithsonian Exhibit of 1991.
It was Horch, an avid Star Trek fan, who had constructed, for convention purposes, the replicas of the original series captain's chair and helm, and navigational console, that were used in the episode TNG: "Relics".  Discovered by Michael Okuda, who flat-out stated, "If not for Steve Horch, we would not have that scene.", they were rented for the recreation of the original Constitution-class bridge in the episode. (Star Trek: The Next Generation 365, p. 548) Returned to Horch after use, the set pieces continued their existence as tour displays, as well as later serving as masters for additional copies to commercial ends.
After SFMA went out of business, Horch went on to found HMS Creative Productions, Inc. in 1998 with fellow prop maker Michael Moore. Continuing where SFMA left off, he and his company, proceeded to provide the Star Trek franchise with props and models.
Succumbing to cancer, Steve Horch passed away in 2010.