This is a contractor I haven’t covered before. The pair of stamps is on the east side of Rumsey Avenue between Jerome and Vine.
Shenandoah Construction is based in Mason. According to Angieslist, they were founded in 1990 and “emphasize concrete flatwork in the summers.” I am unsure whether they are still in business. They have a Facebook page, but the most recent posts were two years ago and their Web site is defunct.