Management

Stefan Mehlhorn

President and Chief Executive Officer
Stefan has over a decade of in-depth experience in the enterprise-class software industry, managing deployments of large-scale, mission-critical software applications for Fortune 500 customers on four continents. Stefan was previously Permessa's Vice President of Services where he significantly grew Permessa's professional services business, developed new methodologies and expanded relationship with key integration partners. Prior to joining Permessa, Stefan was the Director Product Strategy, Content Solutions at MRO Software, a position he held after selling his former company, Collego, to MRO in August of 2001. As President and CEO at Collego, Stefan was instrumental in developing a next generation content management solution, enabling the XML based distribution of product information within the industrial supply chain. He has also held the position of Senior Practice Manager at Siebel Systems through Siebel's acquisition of InterActive WorkPlace, a software company where Stefan held key management positions. Prior to his work at Siebel and InterActive WorkPlace, Stefan managed the Professional Services Practice for North America at POINT Information Systems. 

Stefan holds a degree as Diplomingenieur in Computer Science and Information Technology from the Technische Universität Chemnitz, Germany.

Yuval Shimoni

Co-founder, Chief Technology Officer
Yuval Shimoni has more than 15 years experience in developing large, complex software systems. Since co-founding Permessa (formerly DYS Analytics) in 1993, he has led the design and development of the award-winning Permessa Control! product lines. Yuval's prior experience includes the design and development of software for control of automated warehouse systems and the development of statistical database analysis systems for Harvard University's School of Public Health. 

Yuval earned both his Master of Science and his Bachelor of Science in Computer Science from the University of Massachusetts in Boston. 

Roger Matus

VP of Marketing
Roger Matus brings more than 20 years of high tech experience to Permessa. Combining a unique blend of marketing and technology expertise, he has successfully brought dozens of innovative products to market including personal computer hardware, video boards, speech recognition software, internet telephony services and audio conferencing equipment. He served as Executive Vice President for WebReply.Com, Chief Marketing Officer for Octave Communications, Vice President of New Products and Technologies for iBasis and both Vice President of New Products and Technologies and Vice President of North American Marketing for Dragon Systems. He also held a series of positions at the Digital Equipment Corporation and ATI Technologies.

Roger has an MBA from the University of Chicago, an M.S. in Engineering from Boston University, and a B.A. in Journalism from Syracuse University.

Stephen Grinder

Senior Director of Product Management
Stephen Grinder is the senior director of product management at Permessa and has more than 20 years of marketing and product management experience in the software, networking hardware, and network management industries. With experience in both start-ups and large organizations, Stephen has a proven track record of successfully launching products and services that lead to significant corporate growth and profitability. As the Senior Director of Product Management, he oversees all Permessa product initiatives, as well as spearheads the Permessa-IBM business partnership. Prior to joining Permessa, Steve held the position of director of Service Marketing at managed service provider Vanguard Managed Solutions where he defined the service/product roadmap, added revenue streams, and created "go to market strategies" for all new service offerings. Prior to Vanguard, he held several product management and marketing positions with 3Com, Bay Networks, CrossComm Corporation, Data General, CENTEL Information Systems, and Morris Decision Systems. 

Stephen holds a B.S. in Marketing / Computer Science from Lehigh University. 

Kenneth Gartner

Director of Software Development
Ken Gartner brings the benefits of nearly 20 years of software development and management experience to the Permessa executive team. Ken is also remains an active developer, architecting the new Permessa CONTROL! Enforcer product family to support realtime mail policy enforcement for Domino. As Director of Software Development, he oversees all software engineering efforts at Permessa. Before joining Permessa, Ken was Engineering Manager for Hitachi Computer Products, where he led teams developing high performance CORBA Enterprise products, contributed to international standards such as the x/Open Universal Measurement Architecture and the POSIX p1003.4 Realtime specifications, and was a conference speaker for the Computer Measurement Group. An industry veteran, Ken has extensive hardware and software development experience -- from the design for hardware LISP machines and the first CMOS CISC PR1MOS Superminicomputer, to OSF/1 UNIX kernel design and its porting to massively parallel hardware, to UNIX kernel debuggers, crash dump analyzers and process tracing, to performant middleware implementations, to XML security for Web Service architectures, to Exchange and Domino collaboration tools, and myriad other server technologies. 

Ken holds a Bachelor of Science in Electrical Engineering from the Massachusetts Institute of Technology. 

William Polymenakos

Director of Professional Services
William Polymenakos brings more than 20 years of technology industry experience in such varied roles as executive management, project management, systems architecture, support, applications development, sales, systems engineering, and consulting. As Director of Professional Services, Polymenakos oversees Permessa's consulting, services, and support practices. Prior to joining Permessa, Polymenakos held the position of Director of Technology/CIO at Ecker Enterprises, Inc. Polymenakos' work at Ecker earned him nominations for the Executives’ Club of Chicago/Association of Information Technology Professionals 2006 CIO of the Year and CIO Magazine 2007 Ones to Watch awards, as well as numerous press citations in such industry-leading periodicals as eWeek and InformationWeek. Prior to Ecker, Polymenakos held key roles in GlaxoSmithKline in such varied areas as managing end-user support, through managing support for a global mission-critical Lotus Domino infrastructure, through technical architect and program leader for global information systems standards for use across all divisions of the enterprise.

Frederick Smith

Director of Finance
Fred Smith has over twenty-five years of financial and operations management experience, the last nine of which he spent managing Permessa’s financial operations, accounting, contracts, and human resource activities. Prior to Permessa, Fred spent 10 years in much the same role at other privately-held early-stage software companies including Envoy Systems, Attain Corporation, and Atreve Software. Before entering the software world, he held corporate financial planning and operations management positions at Waban Inc., Boston Edison, and Peoples Bank of Bridgeport, CT.

Fred holds an MBA from the Amos Tuck School of Business at Dartmouth College, and a BA in English from Princeton University.