<p>Pinnacle Contracting, Inc., of Clayton has added Adam Goldsborough as a project engineer and Robert Besterfeldt as a project superintendent.<br /></p>
<p>Goldsborough earned a degree in construction technology at St. Louis Community College at Florissant Valley and a bachelor's in construction management at Southeast Missouri State University. He previously worked with C. Rallo Contracting and interned with Walton Construction.<br /></p>
<p>Besterfeldt, with 13 years of experience as a superintendent, previously worked with Harold F. Helmkampf Contracting and Jett Contracting.</p>