Jeffrey Greenberg

Builder of Products & Platforms: An innovative CTO with an artful sensibility

Career Summary

With decades of technology and product leadership, in startups and established major corporations, I provide CIO / CTO / VP Engineering level guidance to companies and senior management.

As an entrepreneur I have founded businesses, worked on funding and M&A, and have created products & systems that benefit millions. (Not without failures along the way…) I’m passionate about supporting disciplined and creative work by individuals and teams from all disciplines to build great products, services, systems, and processes that are cost-efficient and create value. I have received recognition for innovation though referenced patents, celebrity demos, and awards. I’ve managed teams (2-200+ people) providing products and services to both internal users and to millions at large, managing significant budgets (>$50MM).

Both creative and practical, with a deep technology background as well as a sophisticated art background, my interest is to work on products that solve good problems and find new and better ways to get good things done.


Work History

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Recent Roles

• CTO, Principal Consultant, Founder – Inventivity (1999-present) (clients: Siri, Liberty Travel, Aon/Hewitt, Scient / Microsoft / Publicis, Sonic Solutions / Rovi, …)
• CIO – Liberty Travel (2005-2006)
• CTO – (2007-8)
• CTO, Founder – (2009-2015)
• CTO, Founder – Lines App (2013-present)



• Acuson / Siemens (1996-99)
• Verizon / NYNEX (1993-1996)
• NewTools, Inc. (1991-94)
• Bell Laboratories, … (pre-91)




Selected Press & Reviews


Artistic Recognition

Art + Technology


  • MFA & BA: Bioengineering & Visual Art, University of California, San Diego (UCSD).
  • Multiple academic honors and scholarships.

Leadership, Volunteering & Open Source


Publications & Courses

Publications, Teaching, Authorship

Notable Engagements

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Served as CIO

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Consulted on Engineering process improvement

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Founded & served as Principal Consultant

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Consulted as Primary System Architect

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Consulting CTO

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Technology due diligence

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Consulting CTO

Innovations & Patents

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I worked at Acuson Corp., maker of state-of-the-art diagnostic ultrasound and now a division of Siemens. As the team leader, I was instrumental in the product development, design and delivery of a Java-based medical application, dubbed WebPro. This system allowed physicians, for the first time, to review ultrasound examinations over the Internet. WebPro ultimately became an entire line of products for Acuson.

Lorem IpsumCisco chairman John Chambers recognized this achievement in not only the Cisco quarterly report, and in his keynote speech at a health industry conference, but also in a demonstration with then Vice President Al Gore and visiting high government officials from Russia. [_Press_Release_]

“With new internet applications such as [the] WebPro package, health care professionals can use Internet technology to make online medical assessments for patients 24 hours a day, delivering cost-effective ultrasound diagnosis anywhere the physician is located.”
— John Chambers, CEO Cisco

I also had the chance to do some unique research with voice and touch interfaces for improving medical workstation products, and research into reducing speckle on ultrasound images. I was awarded a sole patent US6514201 for this interface work, and a patent US6511426 as a co-inventor for the medical imaging enhancement work.

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Early in my career, I was fortunate enough to have invented and commercialized one of the first “drag and drop” interfaces for Windows. Even before Microsoft itself was able to accomplish it. It was an entirely new product category in which many players followed.


Here’s what was said at the time:
“WinTools offers the most powerful tools for customizing the Windows desktop that PC Week Labs has tested…”
—PC Week

“A revolutionary revamping of the way Windows works and looks!
...You’ll love WinTools.”

—PC Magazine

“WinTools is the most gracefully graphical way to work in Windows…
Get Wintools. It’s great stuff.”

—Computer Shopper

“If you’re a Windows fanatic, you’ll love it…”
—From John Dvorak

Advances in Operating Systems: Fault-tolerant, distibuted UNIX

I helped design and implement large parts of the Auragen fault-tolerant operating system based on UNIX. From this early distributed and fault-tolerant system we learned many lessons that are relevant today: the advantages and challenges of using thousands of computers for large computing tasks and reliable operations. This paper was an important computer science paper with more than 300 citations. Our work there was important as one of the first pure software solutions to operating systems fault-tolerance through parallelism and loosely synchronized computers. The system competed with Tandem and Stratus's approaches, and was ultimately sold to Siemens.

I worked on implementing about 90% of UNIX system calls and implemented an early virtual memory paging implementation. It was also great experience for working close to the metal and having a very deep understanding of software and systems. I worked closely with Anita Borg who later worked passionately on opportunities for women in technology.


Embracing Change and Innovation

Different Minds, Metrics and Value Creation

Technology Innovation

Strategic Vision