Achieving Cyber Resilience, External Cybersecurity & Risk Reduction – Margarita Barrero, Andy Grolnick, Alexandre Sieira – ESW Vault

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AxurGraylogTenchi Security
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Margarita Barrero
Head of International Business at Axur

With over 15 years of experience, Margarita is Head of International Business at Axur. During her professional career, Margarita has led internationalization projects for technology companies and value-added distributors and manufacturers of SaaS solutions.

Andy Grolnick
CEO at Graylog

As CEO of Graylog, Andy Grolnick drives the company strategy to help organizations and IT professionals solve security, compliance, operational, and DevOps issues. Andy brings over thirty years of experience building and leading high-growth technology businesses in enterprise software, security, and storage. He also currently serves on the boards of Resurface and ThreatX. Previously, Andy served as Chairman & CEO of LogRhythm for 14 years and VP/General Manager of Iomega’s Zip Drive division.

Alexandre Sieira
Cofounder and CTO at Tenchi Security

Alexandre (or Alex) Sieira is a successful information security entrepreneur in the information security field with a global footprint since 2003. He began his security career as a Co-Founder and CTO of CIPHER, an international security consulting and MSSP headquartered in Brazil which was later acquired by Prosegur. In 2015, he became Co-Founder and CTO of Niddel, a bootstrapped security analytics SaaS startup running entirely on the cloud, which was awarded a Gartner Cool Vendor award in 2016. After the acquisition of Niddel by Verizon in January 2018, he became the Senior manager and global leader of Managed Security Services products under the Detect & Respond portfolio tower at Verizon. Currently is the CTO and Co-Founder of Tenchi Security, a company disrupting the Third Party Cyber Risk Management market.


Principal Researcher at The Defenders Initiative
Sr. InfoSec Consultant at Online Business Sytems