The Core BTS Leadership Team

Walter Cook Bio Picture

Walter J. Cook II
Chief Executive Officer


Mr. Cook is an actively-engaged CEO, who draws on his over 20 years of leadership experience in the technology industry to define Core’s strategic mission and vision. Prior to co-founding Core in 2004, Mr. Cook served in leadership roles at Vytek Wireless Corporation, GE Capital Information Technology Solutions, Inc., and AmeriData Technologies.


Outside of Core, Mr. Cook is a devoted husband and father of two, and enjoys watching his children play soccer, field hockey, and lacrosse. As a family, the Cooks enjoy spending their weekends together skiing and boating.


Mr. Cook holds a Bachelor of Science degree in Accounting from Marist College.

Bill Wilshire Bio Picture

Bill Wilshire
Chief Operating Officer and General Manager of Services


As Chief Operating Officer and General Manager of Services, Mr. Wilshire leads Core’s internal technology strategy and Core Learning division, as well as oversees all professional services and customer delivery. Through these organizations, Mr. Wilshire is focused on identifying, designing and delivering holistic solutions to customers. Under his leadership, Core has developed a strategic Envision, Execute, Enable approach to accomplish this purpose across all major verticals. This approach, coupled with Mr. Wilshire’s “push for perfection” leadership style, is what creates a rewarding experience for customers.


Mr. Wilshire holds a Bachelor of Science degree in Aerospace Engineering from West Point and a Master of Business Administration from Harvard Business School. Additionally, he achieved his Executive Education Certificate from Babson College and has held multiple leadership roles across the technology industry.

Mark Zerbe Bio Picture

Mark Zerbe
Senior Vice President, Sales and Marketing


Mr. Zerbe brings extensive experience and leadership from nearly 30 years in the Information Technology industry. Mark has led several organizations through extended periods of growth both organically and via acquisition. Prior to joining Core in 2016, Mark served as President of Dimension Data for the Americas Region. Mr. Zerbe has participated on multiple industry boards and advisory councils and is known for the intense focus, energy, and passion he brings to every team he serves.


Mark is married with two children. He holds a Bachelor of Science degree in Computer Sciences from The University of Texas.

Jason Eickmann Bio Picture

Jason Eickmann
Senior Vice President, General Counsel


As Senior Vice President, General Counsel, Mr. Eickmann oversees Core’s legal and compliance initiatives, in addition to leading the human resources organization. Mr. Eickmann has served as General Counsel for Core Business Technology Solutions, LLC since 2004, and was appointed by the board to the positions of Senior Vice President and Secretary subsequent to Core’s acquisition by Convergence Technologies, Inc., (CTi). Additionally, he has worked in sales and management roles in the technology industry since 1995. He holds a Bachelor of Arts degree in Political Science and a Doctor of Jurisprudence from Indiana University. Mr. Eickmann is admitted to practice law in the State of Indiana and in the United States District Courts for the Northern and Southern Districts of Indiana.

dylan pure bio Pic

Dylan Pure
VP of Strategy & Business Development


As VP of Strategy & Business Development, Dylan focuses on strategic roadmap development to optimize Core’s unique market position and holistic IT services value proposition. In addition, Dylan is responsible for Core’s merger and acquisitions function.


Dylan has previous experience at Strategy&, a PwC strategy consulting firm. As the Director of the Technology, Media, and Telecom Deals Strategy group at Strategy&, Dylan played a critical role in building the team and leading it through numerous transactions valued at over $10 billion.


Dylan holds a Bachelor of Science in Business Administration and an MBA from Indiana University’s Kelley School of Business.