Executive Team

Jonathan Spier
CEO and Co-Founder
Jonathan co-founded NetBase and leads the company’s business and sales strategy. His leadership has helped the company transition from a start-up to a world-class software provider that helps solve some of the most complex information challenges faced by the Fortune 500.

Prior to NetBase, Jonathan worked for Ariba where he managed teams responsible for the core technology underlying Ariba’s business-to-business e-commerce platform. He also managed several key partner relationships. Jonathan holds an MBA with Distinction from the Harvard Business School and a BA in computer science with honors from UC Berkeley.

Michael Osofsky
Chief Innovation Officer and Co-Founder
Michael is the inventor of the technology powering NetBase’s product solutions. His unique background spans computer science and innovation science, and due to his experience in both areas, he came up with the idea of applying the speed and reach of technology to knowledge worker's everyday information needs.

Prior to NetBase, Michael worked for Ariba, where he led multiple product development efforts. Michael holds an MBA from the MIT Sloan School of Management, where he founded the MIT Innovation Club, whose 200+ members learn about the science and practice of innovation. Additionally, Michael holds a BA in computer science from UC Berkeley.

Barrett Foster
Vice President of Sales and Support
Barrett brings more than 15 years of software and information services sales experience to NetBase. He has a track record of strong sales leadership as vice president of sales for Integrated Decision Systems (IDS) and for StockPower, and as vice president of worldwide sales and client services at MicroPatent. At MicroPatent, Barrett was responsible for sales of MicroPatent’s flagship product, Aureka, as well as sales operations and client services for PatentWeb and Trademark.com.

In the past, he served as director of sales for The Investext Group, a part of Thomson Financial Services. Barrett holds an MBA from Georgetown University and a BA in economics from University of Colorado. He also completed a graduate level marketing program at Oxford University in Oxford, England.

Stephen Winters
Vice President of Engineering and Operations
Stephen provides NetBase with over 25 years experience building and leading exceptional teams. Most recently, Stephen consulted with clients including HP, Symbol, DemandTec and others, helping them improve their ability to meet and deliver commitments for technical products.

Previously, Stephen was vice president of Engineering at Ariba where he was instrumental in instituting effective development processes. Prior to Ariba, Stephen was president and COO at DigitalSquare. He also worked for Cadence Design Systems where he led development and delivery of the largest consulting engagement in Cadence's history. Stephen also spent 10 years at Apple Computer, where he served as the director of licensing operations, and in imaging technologies as the creator and manager of the Imaging Host Software team. Prior to Apple, Stephen founded and led Winters Electric, Inc., an electrical design and construction firm that was listed in the Inc 500. Stephen is a graduate of The Business Professional's Course, an executive MBA-level program, and he is an on-going student in the LEIP Program by The Aji Network. He has completed extensive studies in business and computer science, initially at The University of Alaska.

Jens Tellefsen
Vice President of Marketing and Product Strategy
Jens brings more than 15 years of experience in enterprise software, leading companies in areas of product strategy, marketing and product management.

Jens has held executive positions at several enterprise software companies, including Vendavo (price management), Callidus Software (sales compensation management) (NASDAQ: CALD), Phiware (demand planning), Pervado Systems / Allmystuff (product ownership and warranty services), and Trilogy Software (sales compensation management). Prior to Trilogy, Jens worked at McKinsey & Company advising major corporations. Jens holds a bachelor degree from Princeton University with a focus in Computer Science and Electrical Engineering.