Leadership

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.

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Zix Board of Directors
 

Mark J. Bonney

 

Mark J. Bonney joined our Board in January 2013. He currently serves as President and CEO of On Board Advisors, LLC, a financial and strategic advisory firm. From October 2019 to December 2019 Mr. Bonney was Independent Chairman of the Board of SeaChange International, Inc.,(NASDAQ: SEAC), a provider of end-to-end video delivery and management software solutions for cable wireless, OTT and other content providing enterprises. From April 2019 to October 2019 he was Executive Chair and Principal Executive Officer of SeaChange. From August 2017 to April 2019 he was a Director and Chairman of the Audit and Compensation Committees of SeaChange. From May 2018 until its merger with Taptica, PLC in April 2019, he served as President and Chief Executive Officer and a director of RhythmOne PLC, (LSE AIM:RTHM), a provider of digital advertising solutions. Until its sale in August 2017, he served as President and Chief Executive Officer and a director of MRV Communications, Inc., (NASDAQ:MRVC), a supplier of network equipment to the telecommunications industry. Mr. Bonney served as an independent Director and Chairman of the Audit Committee of MRV from April 2013 until joining the management team in August 2014. He also served as a Director and Chairman of the Audit Committee and the Corporate Governance and Nominating Committee of Sigma Designs, Inc., (NASDAQ:SIGM), a provider of high-performance system-on-a-chip semiconductor solutions enabling the convergence of the smart home, from August 2012 through August 2015. He was executive vice president and Chief Financial Officer of Direct Brands, LLC, a privately owned direct to consumer media company from 2010 to 2012, vice president and general manager of the Authentication Solutions Group of JDS Uniphase Corporation (“JDSU”) an optical technologies and telecommunications firm, from 2008 to 2010 and executive vice president and Chief Financial Officer of American Bank Note Holographics, Inc., (“ABNH”) an optical security device company from 2005 to 2008, before the company’s sale to JDSU. Mr. Bonney also served as an outside director and chairman of the audit committee of ABNH from 2003 until 2005. Mr. Bonney has also held executive roles with technology companies, including president, Chief Operating Officer and a director of Axsys Technologies, Inc., a manufacturer of components and subsystems for aerospace, defense, data storage, medical and other high technology applications from 1999 to 2002 and Chief Financial Officer of Zygo Corporation, a manufacturer of metrology measurement and control systems and optical components for semiconductor, data storage and industrial markets from 1993 to 1999. He received a Master’s degree from the University of Hartford and a Bachelor’s degree from Central Connecticut State University.

Marcy Campbell

 

Marcy Campbell is currently Vice President Sales, for North America, Australia and Global Sales Operations for PayPal. Prior to this role, Marcy held roles as Vice President & GM for North America, Vice President Worldwide Sales & Accounts for Braintree, (a PayPal Division) and Vice President, North American Sales and Accounts for Braintree.  Prior to joining PayPal, Marcy led  high-performance sales, business development, and marketing organizations  for large and small enterprises  including  Qubole, Engine Yard, Netscape, and IBM. Marcy holds a Bachelors of Arts in History and Communications from the University of Hartford in Hartford, CT, where she was summa cum laude, and a National Regent Scholar.

Taher Elgamal

 

Taher Elgamal was elected to Zix's Board of Directors in July 2011. Dr. Elgamal currently serves as CTO Security at Salesforce.com. He is also co-founder and Chairman of IdentityMind, Inc. and serves as a director of Intelligent Fiber Optic Systems Corporation and Vindicia, Inc. Dr. Elgamal has also held executive roles at technology and security companies, including as CEO of First Information Security from 2012 to 2013, CSO of Axway, Inc. from 2008 to 2011, CTO of Tumbleweed Communications from 2006 to 2008, CTO of Securify, Inc. from 2001 to 2004, CEO and president of Securify, Inc. from 1998 to 2001 and chief scientist of Netscape Communications from 1995 to 1998. Dr. Elgamal is a recipient of the RSA Conference 2009 Lifetime Achievement Award, and he is recognized as the "father of SSL," the Internet security standard Secure Sockets Layer. Dr. Elgamal was issued several patents in online security, payments and data compression. He received a bachelor's degree in electrical engineering from Cairo University, a master's degree in electrical engineering from Stanford University and a doctorate in electrical engineering from Stanford University.

James H. Greene, Jr.

 

James H. Greene, Jr. joined the Zix Board of Directors in February 2019. Mr. Greene is a Founding Partner of True Wind, where he serves on the Investment Committee and is responsible for all aspects of managing the firm. Prior to joining True Wind, Mr. Greene was with Kohlberg Kravis Roberts & Co., which he joined in 1986. At KKR, Mr. Greene founded the Global Technology Group in 2004 which he led until 2010. In 2010, Mr. Greene headed the Industrial Group until 2013. Mr. Greene was a Partner at KKR from 1993 until 2015. Prior to joining KKR, Mr. Greene had 14 years of banking experience as a Vice President at Bankers Trust Company. Mr. Greene currently serves as Chairman of the Board of Transflo and is a Director and Co-Chief Executive Officer of Nebula Acquisition Corporation. He is also a Trustee and a Member of the Executive Committee of the University of Pennsylvania, a member of the Executive Committee and Board of Penn Medicine, which includes the Perelman School of Medicine and the University of Pennsylvania Health System, Vice Chairman of Penn's Athletic Overseers Board and Co‐Chairman of Penn's Lacrosse Alumni Board. Mr. Greene received a B.S. in Economics from the University of Pennsylvania.

Robert C. Hausmann

 

Robert C. Hausmann was elected to our Board in November 2005, was elected Lead Independent Director in December 2012 and non-executive Chairman of the Board in December 2014. In September 2016, Mr. Hausmann became an Operating Partner with Thoma Bravo, a private equity investment firm. During varying periods from 2016 to the present time, Mr. Hausmann has served the following Thoma Bravo-affiliated companies (all of which are privately held) in the following capacities: Veriforce formerly known as PEC Safety (chairman of board, chairman of compensation committee and member of audit committee); Nixtex Global, Ltd. (member of board, audit and compensation committees); Motus, LLC (member of board and audit committee); Riskonnect, Inc. (member of board and audit committee); and T2 Systems, Inc. (member of board and audit committee). Mr. Hausmann was co-founder, a director and Chief Financial Officer of TetraSun, Inc., a solar cell R&D and Manufacturing company that was sold to First Solar, Inc. in 2013. Prior to co-founding TetraSun, Mr. Hausmann was a consultant to public and private companies with respect to operational and financial management matters, including Sarbanes-Oxley and systems and process re-engineering. He also served as Vice President and Chief Financial Officer of Securify, Inc. (computer security monitoring) from September 2002 through June 2005. From September 1999 through September 2002, Mr. Hausmann served as Vice President and Chief Financial Officer of Resonate, Inc. (network traffic management) and managed that company’s initial public offering. Prior to these positions, he served as Operations Partner and Chief Financial Officer of Mohr, Davidow Ventures, a Silicon Valley-based venture capital partnership; and as the Chief Financial Officer of Red Brick Systems, Inc., where Mr. Hausmann managed the company’s initial public offering. Mr. Hausmann earned a Master of Business Administration degree from Santa Clara University and a Bachelors of Arts degree in Finance and Accounting from Bethel University.

Maribess Miller

 

Maribess Miller was elected to Zix's Board of Directors in April 2010. Ms. Miller was a member of the public accounting firm PricewaterhouseCoopers LLP from 1975 until 2009, including serving as the North Texas Market Managing Partner from 2001 until 2009; as Southwest Region Consumer, Industrial Products and Services Leader from 1998 until 2001; and as Managing Partner of that firm's U.S. Healthcare Audit Practice from 1995 to 1998. Since July 2014, Ms. Miller has served as a member of the board of directors for Triumph Bancorp, Inc. (NASDAQ: TBK) and is currently chair of the nominating and governance committee and member of the audit committee. Ms. Miller is also a member of the board of directors and chair of the audit committee for Midmark Corporation, a privately-held medical supply company. She served on the Texas State Board of Public Accountancy from 2009-2015, is past Board Chair for the Texas Health Institute and serves on the boards of the TCU Neeley School of Business and the North Texas Chapter of the National Association of Corporate Directors. She graduated cum laude with a bachelor's degree in accounting from Texas Christian University. Ms. Miller is a certified public accountant.

Brandon Van Buren

 

Brandon Van Buren joined the Zix Board of Directors in February 2019. Mr. Van Buren has been a Principal at True Wind since 2017. Prior to joining True Wind, Mr. Van Buren was a Principal at Google Capital, Alphabet’s private investment arm, where he led growth equity investments within the technology, media, and telecommunications sectors. Prior to joining Google, Mr. Van Buren was with KKR from 2010 to 2012 where he executed leveraged buyout transactions within the technology space. Mr. Van Buren holds as a B.S. in Business Administration with concentrations in Finance and Accounting from California Polytechnic State University, San Luis Obispo and a Masters of Business Administration from Harvard Business School where he was a Baker Scholar.

Dave Wagner

 

Dave 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, Mr. Wagner held leadership roles at Entrust for 20 years. Most recently Mr. Wagner served as President of Entrust from 2013 though 2015., where he led the successful integration of Entrust after its acquisition by Datacard. Mr. Wagner 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, Mr. Wagner 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.