Sonim Technologies, Inc. announced the addition of Randy Denny as executive vice president of sales, and John Graff as chief marketing officer. Denny and Graff are accomplished business leaders who bring proven track records in public safety, North American carrier customers, non-carrier channels, B2B technology, and rugged mobility. As executive vice president of sales, Denny will lead the global sales, customer service and sales operations for Sonim. Denny most recently served as vice president of sales North America for RealWear. He also served as senior vice president of global sales for Xplore Technologies. Graff will serve as the company's chief marketing officer, responsible for corporate marketing, channel marketing, communications, product management and product marketing. Prior to Sonim, Graff served as chief revenue officer and vice president of marketing at Xplore Technologies.