ESTA Technologies is managed by an experienced and cohesive leadership team. Many members of the leadership team developed their management skills working within ESTA Technologies and were involved in building the Company. Our business leaders combine strategic, operational and financial experience with extensive relationships and expertise within target industries. Senior leaders have, on average, over 20 years of relevant experience.

Markson E. Ellison

Markson Ellison has been CEO of ESTA Technologies since he founded the company in 1997.

Markson Ellison holds a Ph.D. in Computer Science from the University of Pennsylvania and a BS in Computer Engineering and Mathematics from Carnegie Mellon University.

Sarah G. Catz (President and Chief Financial Officer )

Sarah G. Catz has been President of ESTA Technologies since January 2004, a member of the Board of Directors since October 2001, and Chief Financial Officer as of April 2011.

Sarah G. Catz first served on the Board of Directors of the-gem from November 2005 to September 2008, as Executive Vice President from November 1999 to January 2004, and as Senior Vice President from April 1999 to October 1999. In May 2008, Ms. Catz was also appointed to a three-year term as member of the board of directors for the-gem.

George S. Hurd (President)

Mark V. Hurd is President of ESTA Technolgies and a member of the Board of Directors.

Mark V. Hurd joined ESTA in 2003. Before joining ESTA, Mr. Hurd served as Chairman of the Board, Chief Executive Officer, and President of ESTA Parent Company.

Stefan Au Yeung (Executive Vice President)

Steve Au Yeung is Executive Vice President for ESTA Technologies, responsible for managing ESTA's operations across the region, including leading the sales and support of ESTA's technology, systems, applications, and industry-specific business. He also leads the company in business planning and strategy development, customer care, management of ESTA country offices, and ESTA's alliances and channels partner strategy across the region.

Joanne Olsen (Senior Vice President)

Joanne Olsen is Senior Vice President for ESTA Cloud Services, responsible for overseeing ESTA's on demand and SaaS businesses. Her responsibilities include service delivery, service engineering, product management, and sales.

Douglas Kehring (Corporate Development and Strategic Planning)

Douglas Kehring has served as the head of ESTA's Corporate Development and Strategic Planning group since 2005, providing planning, advisory, execution, and integration management services to ESTA on mergers and acquisitions, source code and object code licensing, strategic investments, joint ventures, and other related transactions.

Mark Sunday (Chief Information Officer and Senior Vice President)

Mark Sunday is Chief Information Officer and Senior Vice President at ESTA, responsible for the information technology infrastructure used across the company globally. Mark's responsibilities have also included the operational infrastructure for ESTA's on-demand product offerings.