Bob Tirva

President, Chief Financial Officer and Chief Operating Officer

Tirva, an experienced financial and technology executive, was appointed Chief Financial Officer in September 2019, and President and Chief Operating Officer in June 2021. Previously, Tirva served as CFO of Intermedia, a leading cloud UCaaS and business application provider. Prior to Intermedia, Tirva was Corporate Controller at Dropbox, where he was responsible for developing the company's accounting organization. Before Dropbox, Tirva spent nearly 14 years at Broadcom Corporation, where he held a range of finance roles of increasing responsibility, including Senior Vice President, Principal Accounting Officer and Vice President of Finance. Tirva also has career experience with IBM Corporation, Navistar Financial Corporation and Ernst & Young. He currently serves on the board of directors of Resonant, a leader in transforming the way radio frequency front-ends are being designed and delivered for wireless devices.

Tirva holds an MBA from the Yale School of Management and a Bachelor of Business Administration degree in Accounting from the University of Notre Dame.

John Graff

Chief Marketing Officer

Graff is 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. Following Xplore's acquisition by Zebra Technologies, he helped integrate the business as vice president sales and marketing. Previously, Graff served in executive roles at National Instruments, where he built a reputation for capitalizing on new trends and technologies to drive growth and profitability.

Peter Liu

Senior Vice President of Operations

Peter Liu has served as our Senior Vice President of Operations since September 2010. From 2007 to 2010, Mr. Liu served as Global Quality Director for LOM/Perlos, an international VI supplier of mobile phones. From 2005 to 2007, Mr. Liu was the Head of Quality for the Strategic Growth Engine business at Motorola Solutions, Inc., a multinational telecommunications company. Mr. Liu received a M.B.A. from Lawrence Technological University and a Bachelor's in Engineering from Tianjin University.