Ed Clark has joined Comerica Bank-Houston as senior vice president and petroleum engineer in its energy lending group. EthosEnergy has appointed Kevin Taylor as president of Power Solutions, with responsibility for leading the strategic direction of engineering, procurement and construction activities. Tracy Weeden has been named president and CEO of Neuhaus Education Center, a Houston-based nonprofit educational foundation dedicated to promoting reading success. Van DeWitt has been appointed to senior vice president of sales and business development at GulfMark Offshore.