Executive Team


anchoranchorAnchorSean O'Neill - Chairman/sean-oneill.jpg?v=1

Sean O'Neill joined Newmarket in 2001 and currently serves as Chairman. Previously, Sean served as President and Chief Executive Officer from 2001 to 2010.

Prior to joining Newmarket, Sean served as President and Chief Operating Officer, Executive Vice President of Operations, and Chief Information Officer for Grand Circle Corporation, a dynamic, privately held global travel organization. Additionally, Sean spent several years with ITT Sheraton Corporation where he held the executive position of Chief Information Officer/Senior Vice President, managing all central and distributed systems worldwide. He was also responsible for strategic information technology planning for the entire ITT Sheraton Corporation, including development, implementation and support services.

Sean worked with Aeronomics, Inc., a consulting and systems development firm focused on Revenue Management Systems, as Senior Vice President. He also served as Vice President of Development for ECI, a technology organization that launched the first Unix-based relational database Property Management System. Sean began his career in the hospitality industry with Hilton Hotels Corporation.

Sean holds a Higher Diploma in Hotel Management from The Galway-Mayo Institute of Technology in Galway, Ireland. Sean currently serves on the Leadership Board of the Hospitality & Tourism Department at the University of Massachusetts.

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Jeff Hiscox - President and Chief Executive Officer/images/executive-headshots/jeff-hiscox.jpg?v=1

Jeff Hiscox joined Newmarket in July 2004 and has served as President and Chief Executive Officer since March 2010. Previously, Jeff held various senior and executive leadership roles at Newmarket, including Director of Sales, Vice President of Sales, and President. Jeff brings more than 15 years of senior and executive level management and leadership experience to Newmarket.

Prior to joining Newmarket, Jeff served as Regional Vice President of Sales for Surebridge where he was responsible for growth and management of the Microsoft Business Solutions Group. Jeff joined Surebridge through the acquisition of ManagedOps.com / The Taylor Group where he served as Director of Sales.

Prior to Surebridge, Jeff held executive roles with Knowledge Alliance, including Vice President of Sales, where he was responsible for the growth and management of the North America Sales team.

Jeff earned an Honors Bachelor of Commerce degree from Queen's University in Kingston, Ontario, Canada.

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Shawn McGowan - Chief Operating Officer, Chief Technology Officer/images/executive-headshots/shawn-mcgowan.jpg?v=1

Shawn McGowan joined Newmarket in 2003 and currently serves as Chief Operating Officer, Chief Technology Officer. Previously, Shawn held senior and executive leadership roles at Newmarket, including Director of Managed Services, Vice President of Product Development, and Senior Vice President, Product Development and Support.

Prior to joining Newmarket, Shawn served as Internet Architect for ManagedOps.com / The Taylor Group and was co-founder, Vice President and Lead Technical Architect for Coursefinder.com. In addition, Shawn held senior leadership roles in Product Development at Elderhostel.

Shawn holds a Master of Business Administration from Northeastern University, with postgraduate studies in Computer Science along with a Bachelor of Arts in Anthropology from Plymouth State College. Shawn currently serves on the Advisory Board for the Entrepreneurs Foundation of New Hampshire and is the Technical Advisor to the New Hampshire Charitable Foundation.


Ken Smaha - Chief Financial Officer/images/executive-headshots/ken-smaha.jpg?v=1

Ken Smaha joined Newmarket in 2001 at his current position, Chief Financial Officer (CFO).

Prior to joining Newmarket, Ken served as Chief Operating Officer for Safescience Products (SSPI), Inc. Before joining SSPI, Ken held executive leadership roles at Webster Industries, including Senior Vice President/CFO and Executive Vice President.

Ken spent twenty years of his career with General Electric Company where he held senior financial management positions, including CFO for the Control Components and Equipment Division.

Ken earned a MBA from Babson College and a Bachelor of Science degree from the University of Maine.

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Lee Horgan - Executive Vice President, Sales/lee-horgan.png?v=1

Lee Horgan joined Newmarket in 1994 and currently serves as Executive Vice President, Sales. Lee consults Newmarket customers with the goal to help each increase revenue, lower costs, and improve customer satisfaction and guest loyalty by leveraging Newmarket business solutions. Lee's tenure, deep product and industry knowledge, and expertise make him well-suited to work with worldwide hospitality organizations of all sizes.

Prior to his current role, Lee held senior leadership and sales positions at Newmarket, including Customer Sales, Regional Sales, Corporate Sales, as well as responsibility for the successful launches of Delphi.Net and MeetingBroker.

Lee holds a Bachelor of Arts in History from Indiana University. He currently serves on the HSMAI Sales Advisory Board and the MPI Foundation Board.

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Gillian Tierney - Vice President, Human Resources/gillian-tierney.jpg?v=1

Gillian Tierney joined Newmarket in 2007 at her current position, Vice President, Human Resources.

Prior to joining Newmarket, Gillian served as Director of Human Resources for Bottomline Technologies, as well as Tecnomatix Technologies. Gillian brings her HR business partner experience and expertise to champion recruitment, employee relations, organizational development, training, compensation, benefits, and mergers and acquisitions to her role.

Gillian holds a Bachelor of Arts from the University of New Hampshire, a Master's in Education from the University of Massachusetts. She serves on the Board of Advisors for Stay, Work, Play New Hampshire and holds her Senior Professional in Human Resources (SPHR) certification from the Society for Human Resource Management.

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Luis Segredo - President, MTech Division/luis-segredo.jpg?v=1

Luis Segredo joined Newmarket in 2011 at his current position, President, MTech Division.

Luis has been serving the hospitality industry through MTech since 1993. Starting with the introduction of some of the first Windows apps for hotels, Luis has gained a breadth of experience with technology migrations. Most recently, he has navigated MTech through the transition from licensed seat model to managed hosting model. With over 17 years of experience in offering technology solutions at the property and corporate levels, Luis has come to know what works - how and why.

Luis earned a BBA in International Finance and Marketing from the University of Miami.

Bill Sintiris joined Newmarket in 1995 and currently serves as Senior Vice President, Operations.  In this role, Bill is responsible for all aspects of customer delivery and success, overseeing Professional Services, Customer Support, Data Center Operations, and Information Technology. 
Previously, Bill has held a variety of senior leadership, technical, and operational positions at Newmarket, helping architect and build the Newmarket global data center delivery model that has grown to service over 150K users.
Bill holds a Bachelor of Science in Business Administration with an Information Technology Concentration from Southern New Hampshir

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Bill Sintiris – Senior Vice President, Operations/bill-sinitiris.jpg?v=1

Bill Sintiris joined Newmarket in 1995 and currently serves as Senior Vice President, Operations.  In this role, Bill is responsible for all aspects of customer delivery and success, overseeing Professional Services, Customer Support, Data Center Operations, and Information Technology.  

Previously, Bill has held a variety of senior leadership, technical, and operational positions at Newmarket, helping architect and build the Newmarket global data center delivery model that has grown to service over 150K users.

Bill holds a Bachelor of Science in Business Administration with an Information Technology Concentration from Southern New Hampshire University.


Jo Stanford - Managing Director, EMEAI/jo-stanford.jpg?v=1

Jo Stanford joined Newmarket in 2014 at her current position of Managing Director, EMEAI.

Prior to joining Newmarket, Jo served as Group IT Director for the De Vere Group, one of the UK's leading independent hospitality companies, where for eight years she was responsible for leading the strategy and deployment of IT and eCommerce solutions across the entire portfolio. During her time at De Vere Group, Jo also took on a four year tenure (2008 – 2012) as a non-Executive Director of Millenium Stadium Plc (home of Wales Rugby Football Union), where as a member of the board, she was responsible for advising on strategy and corporate governance.

Before joining De Vere Group, Jo served for six years as Group IT Director EMEAI for consulting engineers Parsons Brinckerhoff. Prior to serving as an IT Director, Jo’s career was in sales & marketing, culminating in a number of senior executive roles in a variety of commercial areas including clothing manufacture, IT training and hospitality.

Jo undertook post graduate education at Liverpool University gaining a distinction in Business Administration. In addition, Jo has served time as a voluntary mentor to young entrepreneurs through the Prince's Trust.

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Tim Guo - Managing Director, Asia Pacific/tim-guo-executive-headshot.jpg?v=1

Tim Guo joined Newmarket in 2013 and currently serves as Managing Director, Asia Pacific.

Prior to joining Newmarket, Tim served as the Managing Director for Partech Inc. (a publicly traded US corporation) where he was responsible for creating the market entry strategy as well as execution of the operations, marketing and sales plan in the Greater China market for seven years.  

After serving as a Captain in the US Army for five years, Tim worked in retail, manufacturing and consulting services giving him broad experiences in different industries.

Tim has an Executive MBA from EMBA-Global Asia, a joint program between Columbia Business School, London Business School, and the University of Hong Kong Business School. He received his undergraduate degree in Economics from the United States Military Academy at West Point, New York.

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