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About Us

At Duo, we combine security expertise with a user-centered philosophy to provide two-factor authentication, endpoint remediation and secure single sign-on tools for the modern era. It’s so simple and effective, you get the freedom to focus on your mission and leave protection to us.

Simplicity, empathy and integrity are the building blocks of how we establish trust with you, from our process to our product.

Simplicity

As a company, we present a streamlined, straightforward brand from what we say to how we show it, and we foster an environment where employees are empowered to innovate and lead.

For our customers, we design products that are a snap to get up and running, easy to maintain and don’t get in you or your users’ way.

Empathy

As a company, we support each other’s well-being, promote compassionate leadership, and advocate for diversity.

For our customers, we research the latest design methodologies, take a people-first approach for everything from product development and sales to finance and legal.

Integrity

As a company, we value learning together, focusing on the customer, mentor next-gen tech talent and taking pride in doing the right thing.

For our customers, we build a resilient infrastructure, earn the endorsement of top-flight investors, and recognize that we’re only as successful as you are.

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Sydney Carey
Chief Financial Officer
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Sydney Carey

Sydney is an accomplished Chief Financial Officer with two decades of experience in public markets, corporate finance and strategy expertise. Prior to Duo, Sydney served as CFO for a number of high-growth private and public SaaS companies, including Apttus, ZScaler, MongoDB and TIBCO. Sydney is a Stevie Award Winner for Women in Business – Best Executive, and was named San Francisco Business Times’ Bay Area CFO of the Year. She holds a bachelor’s degree in economics from Stanford University, and is a passionate advocate for female leadership in the C-suite and women in finance, IT and STEAM education.

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Raffaele Mautone
Chief Information Officer
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Raffaele Mautone

Raffaele has over 16 years of Security experience in large and start-up organizations. He has deep expertise in Business Operations as well as running an IT organization. He attended Eastern Michigan University for a BA in Communications and held positions at Dell, McAfee and most recently FireEye.

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Paul DiMarzo
EVP of Corporate Development
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Paul DiMarzo

Paul has more than 26 years of experience as a finance professional. Prior to heading corporate development at Duo, Paul was CFO, leading the company through record revenue growth and funding. He is a three-time CFO and has served in senior management for a number of venture capital-financed technology companies in Boston and Ann Arbor, including Abuzz Technologies, Rock.com, Assay Designs and Molecular Imaging. He was a member of the professional staff of Deloitte in Boston and was on the management team at Sodexho-Marriott through its initial public offering in 1996. Paul is a CPA and holds a bachelor’s degree in economics from Holy Cross College.

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Jim Cyb
SVP of Worldwide Sales
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Jim Cyb

Jim Cyb heads up worldwide sales for Duo Security. Cyb was most recently the Vice President of Sales at Zendesk, where he achieved 5x customer growth with 14x revenue growth leading up to the company’s Initial Public Offering in May 2014. Previously Jim served in senior roles in technical sales, products and marketing.

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Steve McElfresh
SVP of People
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Steve McElfresh

Steve leads Duo’s People team, which is responsible for all things related to employee experience, including hiring and growing diverse talent. He joins Duo from New Relic, bringing more than 19 years of global HR leadership experience, with a passion for building inclusive and organizationally enduring companies. Steve has been the CEO of two management consulting organizations, Chief HR officer for three technology companies, and a university professor. He has presented HR programs across North America, Europe, the Middle East, India and Singapore. Steve holds a JD from Santa Clara University, as well as a PhD in social/organizational psychology from Boston College.

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Ash Devata
VP of Products
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Ash Devata

Ash is responsible for product and Go-To-Market strategy at Duo. Most recently, he managed the enterprise solutions portfolio at RSA, which helped customers solve use cases in GRC, DLP, SOC, SIEM, security analytics and vulnerability management. Ash also helped build and launch more than a dozen cybersecurity products, including four $100M+ revenue products, at RSA, EMC, and Cisco in the last ten years.

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Mike East
VP of Sales, EMEA
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Mike East

Mike leads Duo’s London-based EMEA business. With 27 years of IT and security experience, Mike previously held leadership positions at Symantec, Mandiant, FireEye and CrowdStrike. He is passionate about solving the security issues that companies and governments face on a daily basis from ever increasing cyber security threats. During his time in the security industry, Mike has built strong relationships with government, analysts, press, partners and customers across the EMEA region.

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Mike Hanley
VP of Security
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Mike Hanley

Mike leads all security research, development and operations functions at Duo. Prior to Duo, Mike was a senior member of the technical staff at CERT/CC, working on applied R&D programs for the US Department of Defense and the Intelligence Community. He has a master’s degree in information security policy and management from Carnegie Mellon University and a bachelor’s degree in economics from Michigan State University.

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Peter Katz
General Counsel
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Peter Katz

Peter has more than 13 years of experience as in-house legal counsel. He has served as General Counsel of Duo Security since January 2015. Prior to joining Duo Security, Peter was Senior Counsel and Director at AlixPartners, LLP and before that worked as Associate Counsel at The Vanguard Group and an Associate at Pepper Hamilton LLP.

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Chester Kustarz
VP of Engineering
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Chester Kustarz

Chester leads product engineering and technical operations at Duo Security. Prior to Duo he developed software products for multiple industries including network security, pharmaceutical, healthcare, and telecommunications. Chester holds a B.S.E. in Computer Engineering from University of Michigan.

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Lisa Paul
VP of Customer Success
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Lisa Paul

Lisa Paul is Duo Security’s Vice President of Customer Success where she is responsible for the company’s customer support, business operations, and customer success teams. Prior to joining Duo, Lisa was Head of Sales Infrastructure at Google. She has also served as Director of Information Systems & Services at General Motors and held leadership positions at information technology consulting firms such as Xpedior and Accenture.

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Nick Soulliere
VP of Production Engineering
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Nick Soulliere

Nick leads our Production Engineering team and is responsible for the availability, resiliency, and performance of our production tools and services. Prior to joining Duo, he was VP of Technology at digital marketing firm HelloWorld, where he was responsible for all aspects of the platform used to deliver digital engagement for most of the Fortune 500 brands.

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Ambrosia Vertesi
VP of People and Growth Initiatives
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Ambrosia Vertesi

Ambrosia is global Vice President of People, Growth Initiatives. She was most recently Vice President of Talent at Hootsuite, where she spearheaded the company’s hyper growth – from twenty to nearly a thousand employees with various top employer recognitions. In addition to her role with Duo, Ambrosia is the co-founder of HR Open Source. An industry leader in emerging practices such as social HR and employer branding, she most recently delivered keynote speeches at Linkedin Talent Connect and HR Tech World Conference.

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Jeff Wiss
VP of Corporate Marketing
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Jeff Wiss

Jeff comes to Duo Security from DataStax where he served as Vice President of Corporate Marketing. Previously, Jeff was Vice President of Demand Generation at Zendesk. Jeff also headed up Product Marketing for the MySQL product line at Oracle since its acquisition of Sun Microsystems where he headed up MySQL marketing.

Our Investors

We love our leadership and are proud of how everyone at Duo contributes to our success, but we couldn’t do it without the support of some of the industry’s leading investors. They continually fuel our growth so that we can continue to provide the most innovative solutions in information security.

But don’t just take our word for it – together, their portfolios span more than $7 billion, supporting dozens of companies like Dropbox, Slack, Twilio, Automattic and Typekit.

Our Customers

Ninety-eight percent of Duo customers – which includes brands like Etsy, Facebook, Random House, Toyota and Zillow – would recommend our security solutions, and we hold the highest Net Promoter Score in the industry. Why? Our solutions are the easiest to use and best value in the biz, and our customer support can't be beat.

View our case studies

Where in the World is Duo?

Duo supports the missions of customers across the globe. But you can find our 500+ team members working at our offices in Ann Arbor, MI; San Mateo, CA; Austin, TX and London, UK – or remotely at all manner of coworking spaces, home offices and coffee houses.