Meet our Leadership Team

Paul Lewis

Paul Lewis

CEO & FOUNDER

Paul Lewis

CEO & FOUNDER

Paul is a serial cybersecurity entrepreneur with more than 30 years in the industry. Formerly the Founder and CEO of PG Lewis LLC, a cyber security and data forensics company that was strategically acquired by Robert Half International (NYSE:RHI), and the Founder and CEO of MC2, a data security company that was strategically acquired by Volt Information Sciences (NYSE:VOL), Paul's been granted numerous patents to advance data privacy and protection and is a court-appointed expert in data security and incident response.
Jeffrey Weinstein

Jeffrey Weinstein

President & COO

Mark Dos Santos

Mark Dos Santos

VP Engineering

Simon Yelsky

Simon Yelsky

VP Product

Nick Ryan

Nick Ryan

VP Marketing

Simon Ragona

Simon Ragona

VP Customer Success

Dean Archibald

Dean Archibald

Director of Sales

Joan Dorsey

Joan Dorsey

Director Administration

Anselmo Di Fabio

Anselmo Di Fabio

Distinguished Engineer

Our mission is to make the cyber world a safer place for business. Calamu's data-first approach helps organizations thrive without fear that their own data will be weaponized against them.

PAUL LEWIS, FOUNDER / CEO

Board of Directors

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Lou Ryan (Chairman)

Former CEO & Executive Chairman of Edgewave

Lou Ryan is a serial cybersecurity entrepreneur and investor, with successful exits in his more than 30 years experience leading startup companies. Formerly the CEO and Executive Chairman of Edgewave, and previously of Entercept Security Technology, Lou is an Executive Advisor to Calamu and sits on the Board of Directors.

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Stephen Ward

Managing Director at Insight Partners

Stephen Ward is a Managing Director at Insight Partners, focused on investments in cybersecurity. Prior to joining Insight, Stephen was Chief Information Security Officer at The Home Depot, where he provided progressive direction over cybersecurity and technology risk. His innovative approach has led to malware related patented technology and he has received award recognition from his industry peers in cybersecurity. 

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John Stewart

Former SVP Chief Security & Trust Officer Cisco Systems, Inc.

John Stewart is an angel investor and startup advisor at Talons Ventures, with more than 30 years experience in cybersecurity. Formerly the SVP Chief Security & Trust Officer of Cisco Systems, Inc, he now serves on the Board of Directors at Calamu in addition to serving at TrustMAPP, Quantum Xchange, Blackpoint Cyber, and more.

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Advisory Board

David Holland

Former SVP & Treasurer of Cisco Systems, Inc

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David Schneider

President Emeritus of ServiceNow

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Joe Merces

Co-Founder of Cloud Daddy

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Marla Crawford

General Counsel of Cimplifi

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Patrick Burke

Former Deputy Superintendent of New York State Department of Financial Services

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Robin Matlock

Former CMO of VMware

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Backed by founders, executives, and security leaders from transformational companies:

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