Suwanee, Ga.-based Digirad Corp. appointed Mitchell Quain as a new independent director to its board, effective immediately. He is currently a senior advisor to The Carlyle Group LP, a private equity firm.

Pulse Biosciences Inc., of Hayward, Calif., reported the promotion of Edward Ebbers to executive VP and general manager, dermatology, and the addition of Robert Tyson as VP of sales, North America.

Nashville, Tenn.-based Smiledirectclub reported new appointments and promotions on its executive team. Kay Oswald joins as president of international, while Justin Skinner will become chief technology officer. In terms of promotions, Steve Cicurel has been named chief development officer. Additionally, Cheryl DeSantis, who previously served as VP of people & organization, is now chief people officer.