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Defywire Management Team
Jill Stelfox

Jill Stelfox
Co-founder
Chairman
Chief Executive Officer

Jill Stelfox is truly a driver in the wireless technology revolution. She was haunted by the knowledge that she could track an overnight package more easily than she could locate her children at school in an emergency. With a background in mobile technology, she began a company dedicated to providing teachers, bus drivers, and school officials with the capacity to monitor kids wherabouts throughout the school day, and to ferret out intruders in the schools. In addition, the handheld technology gives school officials immediate access to emergency medical information about an ill or injured child, without losing precious minutes locating the information in a distant office.

Before founding Defywire, Jill served as chief financial officer and director of mobile and wireless at Noblestar Systems from 1997 through 2001. Jill led the successful effort to obtain venture capital for the spin-off company, Riverbed Technologies, a developer of mobile and wireless synchronization products. Later, she managed the sale of Riverbed to Aether Systems for nearly $1 billion, with a 3000 percent return for her investors in just eighteen months. Jill spearheaded the expansion of Noblestar's European presence through the acquisition of the Swedish company, Roaming Factory, and played a critical role in the divestiture of Noblestar Federal Systems to SI Consulting (now SI International).

Before joining Noblestar, Jill served as the CFO and controller for Netafim Irrigation of North America from 1993 through 1997. At Netafim, she developed and implemented the company's strategic plan and business re-engineering initiatives. Jill also spent six years with Deloitte & Touche as a CPA providing audit, tax, and advisory services to privately held, fast growing, and turn-around companies.

Jill serves on many community boards, including the Inova Health System Foundation, the Board for the Girl Scout Council of the Nation's Capital, the Center for Innovation and Technology GAP Investment Fund Board, and the Advisory Board for the School of Management at George Mason University.

Jill holds a bachelor of science degree in accounting from California State University and a CPA from the State of California. In addition, Jill is a mom, a leader in her community, a philanthropist, and an avid Harley Davidson motor-cyclist.

Jim Sondel

Jim Sondel
Co-founder
Chief Technology Officer

Jim brings more than 14 years of experience in high-tech fields to Defywire. He is responsible for customer deployments, the Defywire product roadmap, and leads the development team in implementing software architectures.

Before joining Defywire, Jim spent four years with Fujitsu Consulting in the Telecom, Wireless, and Enterprise Mobility practices. In 2003, he was a founding member and lead mobile architect for Fujitsu Consulting's Enterprise Mobility Practice, which focused on providing mobile solutions for commercial, local, state, and Federal Government clients. In 2002, Jim was a member of Fujitsu's Global Mobile Team, whose purpose was to accumulate wireless and mobility knowledge from all around the world and use this knowledge to develop mobile solutions for companies throughout North and South America.

Before joining Fujitsu, Jim held positions of director of information technology for Fox Communications, a telecommunications service provider, in Bellevue, Washington, and director of information systems at DKSA, the leading research and consulting firm specializing in travel intelligence services.

Jim holds a bachelor of science degree in computer information systems from the State University of New York College at Buffalo.

Jim is actively involved with the National Kidney Foundation, and is an avid tennis player.

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