Threshold Acoustics partners Dawn Schuette, Scott Pfeiffer, and Carl Giegold are delighted to announce the promotion of Constance WalkerRobin Glosemeyer Petrone, and Gregory Miller to principals of the company. All three of them continue to manage projects; all of them look far beyond their consulting roles to contribute to the quality and vibrancy of our practice; and all of them embody the combination of expertise, dedication, and wit that leadership of a company demands and that make them a pleasure to be around.