In the interim, Apogee CEO Russ Huffer will lead Viracon.
"I would like to thank Greg for his dedicated service to Viracon and Apogee over the past three and a half years, and wish him well in his future endeavors," Huffer said in the statement. "I am pleased to work with the Viracon leadership team until my successor as Apogee CEO is named, and can select the next Viracon president. Viracon has the products and services demanded by commercial construction markets for the finest value-added buildings in the United States and internationally. I look forward to your support, and will be spending much of my time with Viracon to ensure a smooth transition."