Meet the Team.

CEO, Cofounder

Steven Sprague

Steven is one of the principal industry evangelists for the application of trusted computing technology. Steven served as President and CEO of Wave Systems Corp. for 14 years before transitioning to the board of directors. A popular speaker on cybersecurity and trusted computing, Steven has a strong technical foundation in the principles, capabilities, and business models of incorporating trusted hardware into everyday computing – and is skilled at translating these concepts into layman’s terms.

CTO, Cofounder

Michael Sprague

Michael is an original web veteran. He developed and directed products spanning digital micro-transactions and trusted execution networks in the nineties, interactive TV and network video distribution in the aughts, and device identity and social media privacy more recently. Michael’s career began as a developer and architect for a small but prestigious consulting firm that was contracted to redefine the global banking system for such clients as JP Morgan, Citibank, and Fidelity.

VP, Engineering

Sean Gilligan

Sean is a seasoned software developer and team lead with 30 years of industry experience. As an independent consultant and principal at Open Systems Development, Sean built networking and systems software products for companies such as Apple, 3Com, Novell, Silicon Graphics, and SUN Microsystems.

VP, Product

Michelle Petigny

Michelle is a fintech patent-holder and management consultant with more than 25 years of experience. From the development of value-creation strategies for global consumer products, healthcare, and financial services providers as a founding member of McKinsey & Company’s finance practice to working with top management in the global banking sector as a founder and partner of the Mitchell Madison Group, Michelle is a master at the application of disruptive technologies. A blockchain evangelist, Michelle has designed cryptographic payment systems and mobile cryptocurrency point-of-sale solutions. She is now focused on digital mastery through the development of leading-edge products in the trusted computing space.

VP, Community

Amy Vernon

Amy is a digital a Swiss Army Knife. She started her career working at The Miami Herald, where she was a member of the staff that won the Pulitzer Prize for Public Service for coverage of Hurricane Andrew. Since then, she’s worked with media companies, social analytics platforms, apps, and even the American Museum of Natural History. She co-founded a predictive analytics platform for news publishers and was the top female submitter of all time on when that meant something.

VP, Strategic Business Development

Len Veil

Len is an entrepreneur in the fintech and trusted computing markets. After nearly a decade designing supercomputers, Len managed complex system development at Microsoft, and mixed signal chip design at Fujitsu. In 1996, emboldened with a passion for consumer cybersecurity, Len co-founded N*Able Technologies, and deployed embedded security systems with PC OEMs. After his company was acquired by Wave Systems Corp., Len led the effort to develop the Embassy Trust System and developed one of the industry’s first implementations of the Trusted Platform Module. A technical contributor to the Trusted Computing Group set of specifications, Len enjoys applying his systems architecture and business development skills in growing companies.

VP, Shared Services

Pavan Muddana

Pavan has a strong technical foundation in the principals of architecting, developing and incorporating cybersecurity solutions in day-to-day applications. He set up a strategic alliance collaborating with C-level executives of iRise, IBM Global Business Services, World Bank and the State Government of Andhra Pradesh in India for a $100 million IT modernization project. Before joining Rivetz, Pavan founded Cyberdeadbolt, a modern authentication service. Prior to that, he held positions of senior architect/manager and had about 15 years of consulting and engineering experience across all aspects of infrastructure, data center and enterprise architecture.

Senior Developer

Mark Hoblit

Mark taught himself BASIC in middle school on an Atari 8-bit computer. Early in high school he wrote his first commercial applications in C for a multi-user bulletin board system. He developed an application for hand-held devices and wrote a forms-processing program that published tests to hand-held devices and graded them for teachers. He went on to do database application conversions and then in the late ’90s started working for a successful internet hosting startup by creating a video streaming software. Most recently, he has been working around Bitcoin technology.

Software Engineer

Greg Laun

Greg is a developer with a serious mathematics background and a strong interest in cryptography and security, especially as applied to distributed systems. He holds a Ph.D in mathematics from the University of Maryland and an MA in cognitive science from Yale University.

Staff Engineer

Paul Imthurn

Paul worked until recently as a chip designer for Certicom, where he was involved in designing and implementing multiple versions of public key accelerators, a true random number generator, and several other cryptographic hardware modules. He joined Rivetz to learn software development and to help write code that runs in the Trusted Execution Environment.

Software Architect

Karl Kuehberger

Karl is a veteran developer and architect with more than 30 years of industry experience. He has a strong background in reverse engineering and debugging and loves solving challenging performance and scalability issues. In the past, Karl designed network messaging protocols and built communication frameworks and pre-boot software for companies such as Dow Jones, Bridge Information Systems and Wave Systems.

Senior Director of Business Development

Diana Meacham

Diana brings to Rivetz more than 30 years of experience in Global Sales, Sales Management, Strategic Alliances & Channel Management and Business Development. Diana has a strong foundation to develop the sales strategy, associated business plans and deliver results enabling relationships and revenue from enterprise markets through small to medium business markets. Her background includes expertise in unified communications & collaboration, cyber security, enterprise IT services, SaaS and cloud delivery models. Diana has served in top sales and executive leadership roles with ROLM, IBM, Siemens Enterprise Communications, and CompuCom.

Web & UI/X Engineer

Andrew Defee

Andrew has spent the last 10 years building creative and intuitive user experiences across a host of innovative projects. He's played pivotal roles in variety of ventures – from preserving consumer privacy in mobile and web apps, to supplanting on-campus college advertising institutions; from fetal heart rate monitoring, to minor presidential campaigns. Andrew is a staunch advocate of consumers' reasonable right to privacy and control over their own information.

App Developer

Tyler Diaz

Tyler has been building production applications that scale for millions of users since 2010. He's responsible for helping with the integrations between the Rivetz servers, phone apps, and Rivetz Core. He also has founded a Y-Combinator startup, traveled around the world, raced some triathlons, and sold oil paintings.

Product Manager

Lexi Sprague

With 5 years of experience launching products both in the corporate and consumer markets Lexi brings valuable hands on experience to the Rivetz team. She focuses on merging user experience, customer support, and cutting-edge features to deliver modern products to the market.

Project Manager

Andrew Finch-Craver

Andrew is a strategic critical thinker, consultant, and entrepreneur with a background in social science, education, and technology. After delving into the mobile payments world, he joined Schoology to help enhance their innovative learning management system. Andrew has consulted with educational, non-profit, and government institutions from the Ellen Frank Illumination Arts Foundation to the New York MTA, teaching stakeholders to leverage emerging technologies and media platforms. He views technology as a key tool to solve real-world problems, rather than an end in itself.

Community Support Specialist

Vanessa Zingaro

Vanessa has been in the customer service industry for more than 12 years. She has previously assisted two start-ups with their creation of the projects, as well as personally taking care of their valued online communities with her professional customer service management experience. A self-taught graphic designer, painter, and singer who is genuinely passionate about helping people, Vanessa has a healthy obsession for the cryptocurrency world. She is excited to be working with the Rivetz team and their amazing community.

Vice Chair

Bradley Rotter

Bradley is a visionary investor who has pioneered investment in many new alternative investments classes beginning, with hedge funds in 1982 while speculating on the Chicago Mercantile Exchange. He traded government bonds for EF Hutton on Wall Street before returning to Chicago to the Board of Trade.

Board Member

George Gilder

George is the author of 15 books: Knowledge & Power: The Information Theory of Capitalism (Regnery 2013); Men & Marriage; Wealth & Poverty (new edition Regnery 2012); The Spirit of Enterprise and Recapturing the Spirit of Enterprise (Micron Technology history). Most recent are technology histories and prophecies: Life After Television, Microcosm, Telecosm, The Silicon Eye, and The Israel Test (reissued with foreword by Joe Lieberman, Encounter, 2012). Microcosm and Telecosm were both listed among the era’s top 10 technology books by VentureBeat in 2012 and Microcosm was ranked among the top two technology books by Wired. Knowledge and Power was honored as the libertarian "book of the year" by FreedomFest 2013.

Board Member

Joe Trippi

Heralded on the cover of The New Republic as the man who "reinvented campaigning," Joe has been at the forefront of movement politics for nearly 30 years. Joe began his political career working on Edward M. Kennedy’s presidential campaign in 1980 and has worked on numerous presidential, gubernatorial, senate, and congressional campaigns ever since.


Matthew Roszak

Matthew is co-founder and chairman of Bloq, a blockchain enterprise software company. He’s also a founding partner of Tally Capital, a private investment firm focused on blockchain-enabled technology with a portfolio of more than 20 investments, including BitFury, Blockstream and Factom. He spent more than 20 years in private equity and venture capital with Advent International, Keystone Capital Partners, Platinum Venture Partners, and SilkRoad Equity, and has invested more than $1 billion of capital (from start-up to IPO) in a broad range of industries. Matthew is a director and beneficial owner of Eboost, MissionMode, Neu Entity, Onramp, SolidSpace, and TrueLook.


David A. Johnston

Chairman of Factom Inc., David is an early blockchain adopter, advocate for decentralized applications and technologist.


Ari Singer

Ari is co-founder and CTO of TrustiPhi LLC, where he leads technical strategy and solution delivery for enabling hardware-based security in next-generation devices. He is a former VP of Trusted Computing at Digital Management Inc. and at NTRU Cryptosystems, where he was integral to helping to define the U.S. Department of Defense’s Trusted Computing technical strategy and enabling industry leaders to deploy Trusted Computing technologies. Ari has frequently served in leadership roles in standards organization, including as chairman of the Trusted Computing Group (TCG) Trusted Platform Module (TPM) and TPM Software Stack (TSS) working groups; as chairman of the IEEE P1363 working group for public key cryptography; and as security editor for IEEE 802.15.3, IEEE 802.15.4 and Efficient Embedded Security Standard (EESS) #1. Ari holds five U.S. issued patents.


Greg Kazmierczak

Greg participated heavily in standards organizations for more than 20 years. He was a member of the Board of Directors and the technical oversight committee in the Trusted Computing Group (TCG) and directly participated as an author, editor or contributor to more than 60 publications and specifications by TCG, IETF, OASIS, IEEE, and NIST. His primary contributions have been on standards relating to platform trust services, attestation, and key management with a special focus on hardware-enforced isolated execution environments such as Trusted Platform Modules, Trusted Execution Environments, and Self-Encrypting Drives. Greg also has contributed to numerous government-industry initiatives and committees, has been a spokesman for the Trusted Computing industry, and serves as a frequent speaker and expert panel member at conferences and industry events such as RSA, Cybersecurity Information Forum, and Trusted Computing Conference.


Andy Tarbox

Andrew is CEO of Thornebrook, LLC and brings more than 30 years of experience in the identity and smart card industry working with financial services, telecommunications, and government sectors. His cross-sector expertise and experience is particularly valuable to pragmatic approaches to large identity and payment deployments to consumers, business and government users. Currently he is leading the transformation of Identity and Access Control systems of a major hospital network with over 12,000 employees and over 1 million patients. He has supported the efforts of a number of companies including IDW, Wave, PRIVO, and TSCP as they worked with the NSTIC program office, a White House initiative to improve Internet privacy and security.


Parity Technologies

Founded by Gavin Wood, founder and former CTO of Ethereum, Parity Technologies is a VC-funded enterprise dedicated to trust-free technology. Its flagship product, Parity Ethereum, is the world’s fastest Ethereum client that integrates directly into your browser.