The EHTC Technology Group of Grand Rapids, Mich., has become a member of the partner network of the SBS Group. It's the first signing we've seen in a couple of months by SBS, one of three Microsoft Master VARs. The new affiliate is a unit of Echelbarger, Himebaugh, Tamm & Co., a CPA firm founded in 1977. Now known as the SBS Group Grand Rapids, the office, under managing partner David Echelbarger.