Cloud security thought leaders

Get to know the people behind the company.

Behind our solutions are people. Not just ordinary people, but experts in development, implementation, troubleshooting, and more. Which means you can rest assured you have the gold standard in email encryption services.

David Wagner

President & Chief Executive Officer


David Wagner joined Zix as President and Chief Executive Officer in January 2016. He is a member of Zix's Board of Directors. Prior to his role at Zix, David held leadership roles at Entrust for 20 years. Most recently David served as President of Entrust from 2013 through 2015, where he led the successful integration of Entrust after its acquisition by Datacard. David delivered revenue growth and led the re-investment strategy to move Entrust solutions to the cloud. He also served as Chief Financial Officer of Entrust from 2003 to 2013. Before joining Entrust, David held various finance and accounting positions at Nortel Networks and at Raytheon Systems. He is a graduate of The Pennsylvania State University where he received an undergraduate degree in accounting and a master’s of business administration.

Dave Rockvam

Vice President & Chief Financial Officer

Dave Rockvam joined Zix as Vice President and Chief Financial Officer in June 2016. Dave brings a wealth of experience in the data security market and more than 20 years of experience in investor relations, financial planning, and business and corporate development. Prior to his role at Zix, Dave served in several executive roles during 18 years with Entrust, including Chief Investor Relations Officer and CFO of Asia Digital Media, an Entrust joint venture. He also held executive roles at Entrust such as General Manager of Entrust Certificate Services, Chief Marketing Officer, and SVP of Product Marketing. Dave began his career at Nortel Networks, where he served in various financial leadership positions. He earned a master of business administration from The University of Texas at Dallas and an undergraduate degree from Texas Tech University.

Dena Bauckman

Vice President, Product Management

Dena Bauckman joined Zix in October 2005 and serves as Vice President of Product Management within the Office of the CTO. Dena has more than 20 years of experience in product management/marketing of security, cloud and networking technology. Prior to her role at Zix, she spent 8 years at Sterling Commerce, an ecommerce company, where she was Director of Product Marketing for the secure managed file transfer solutions. She also worked at Texas Instruments, Soft*Switch, and Hewlett Packard. Dena earned a master of business administration from the University of Dallas and a bachelor’s degree in computer science from California State University East Bay. She has had her Certified Information Systems Security Professional (CISSP) certification since 2007.

Geoff Bibby

Vice President, Marketing

Geoff Bibby joined Zix in September 2003 and serves as Vice President of Marketing. Geoff has more than 15 years of experience in high tech marketing. Prior to Zix, he spent 6 years at Entrust Inc., an internet security vendor, where he served in various management roles, including Marketing Director for Entrust European operations. Geoff earned a bachelor of commerce degree with honors in marketing from the University of Guelph in Guelph, ON, Canada.

Sheila Carpenter


Chief Information Officer


Sheila Carpenter joined Zix in June of 2019 as Chief Information Officer. Sheila oversees security, IT, business applications and compliancy. Before coming to Zix, Sheila was Vice President of IT, Cloud Services Operation for Entrust Datacard. Sheila has worked in the software IT space for over 25 years. She began her career working with business information systems at Mitel Networks, and worked with many startups to implement SaaS offerings, introduce security frameworks and IT service management capabilities. With a strong commitment to promote diversity in security, Carpenter launched the Women’s Network of Ottawa for Entrust Datacard and has also implemented the Women in Security group at Zix | AppRiver.

John Di Leo

Chief Revenue Officer

John Di Leo joined Zix in December 2019 and serves as Chief Revenue Officer. Before joining Zix, John held the role of president at Broad Pointe Consulting from 2016 to 2019. Previously he was Chief Revenue Officer for Entrust Datacard for nearly 7 years and NCR Corporation Region Vice President – North American for more than 25 years. He has a master of Science in Business from The John Hopkins University – Carey Business School.

Bhavin Merchant

Vice President, Corporate Development

Bhavin Merchant joined Zix in May 2017 and serves as Vice President, Corporate Development. He leads strategic growth initiatives for Zix, leveraging nearly 20 years of experience in technology investment banking. Before joining Zix, Bhavin led BVM Consulting from 2014 to 2017. Previously, he was a technology investment banker at Wells Fargo Securities, UBS Securities and Merrill Lynch & Co. Inc. During his career he has completed 50 transactions totaling more than $5 billion, advising leading, global technology companies on strategy, business development, capital raising and merger and acquisitions. Bhavin earned his bachelor’s degree in business administration from the Wharton School of the University of Pennsylvania.

David Robertson

Vice President, Engineering


David Robertson has served as our Vice President, Engineering since March 2002. David has over 35 years of experience in the internet and telecommunications industries, with specific expertise in hosted network architecture, security technology, communication protocols, software systems and wireless infrastructure. From 1981 through 2000, he was employed by Nortel Networks (telecommunications), where he held technology Vice President positions in the Wireless, Carrier and Enterprise Divisions. From 2001 to 2002, he participated in creating technology startup companies with STARTech Early Ventures (venture capital). He has been a participant in several industry standards-setting groups and serves with the City of Richardson Chamber of Commerce. He holds a Bachelor of Science degree in Electrical Engineering from the University of Waterloo, Canada, and a Master’s degree in Engineering from Carleton University, Canada.

Noah Webster

Vice President & General Counsel

Noah F. Webster has served as our Vice President and General Counsel since June 2018. Mr. Webster has over 15 years of legal experience in negotiating agreements, security, compliance and intellectual property. Prior to joining Zix, Mr. Webster worked for eight years at BlackBerry, serving most recently as General Counsel, Mobility Solutions, and holding other legal roles involving privacy and anticorruption legal compliance, M&A, and patent litigation. Before BlackBerry, Mr. Webster worked for Kirkland & Ellis in Chicago, where he represented and advised clients in patent litigations, trademark infringement and general intellectual property matters. Mr. Webster earned his Juris Doctorate degree from the University of Illinois College of Law and clerked with the U.S. District Court for the Eastern District of Michigan and the High Court of American Samoa. He began his career serving as a U.S. Army Engineer Officer. He is a graduate of the U.S. Military Academy, where he earned an undergraduate degree in mechanical engineering. Mr. Webster is a member of the bar for the states of Texas and Illinois. He also holds certification as a Leading Professional in Ethics & Compliance and is registered to practice before the United States Patent and Trademark Office.