Groupware company Radnet, which recently underwent a reorganization and layoffs, has named a new chief executive and president. David Scult, who recently joined the company as senior vice president of sales and service after a ten-year stint at Lotus, succeeds Don Bulens, who is stepping down following a loss in his family. Radnet says the company has refocused on meeting demand for large-scale, enterprise-wide, collaborative Web solutions using WebShare.