John Guyer Summit Academy ManagementJohn Guyer – Chief Executive Officer

John Guyer is the Chief Executive Officer.

John joined Summit Academy Management (SAM) in 2005.  During his tenure, John served as a Network Engineer, Executive Director of Information Technology, Interim Chief Executive Officer (2015 and 2016).  While in the Interim CEO position, he continued to ensure SAM’s financial stability and to enhance the transparency of the organizational culture.

John also has served as Chief Operating and Compliance Officer, and he worked diligently to increase efficiencies and compliance.

Through each of his employment assignments, John has embraced the task of trust-building and enhancing communication flow and transparency.

Before joining SAM, John worked for several private-sector companies — including OMNOVA Solutions, Wayne Dalton Corp., and Smart Solutions — where he specialized in telecommunications and information systems.

John received technology education from the National Institute of Technology, Lakeland Community College, and the University of Phoenix.  He continues to broaden his knowledge through the Organizational Management program at Malone University.

John holds certifications in CISCO CCNA, and Six Sigma Green Belt.


Sara Andreski – Senior Executive Assistant 

Sara Andreski is the newly appointed Senior Executive Assistant.  In that role, Sara trains new Administrative Assistants throughout the 24 Summit Academy Schools, regularly visits sites, and troubleshoots administrative challenges.  She also provides procedural updates and shares best practices.

Sara has served as Executive Assistant to the CEO for the past three years and will continue those responsibilities in addition to her new role.  Sara also is secretary to the SAM Board of Directors, and liaison to the Executive Management team.

Sara possesses more than 15 years of administrative expertise, working both in the business and health-care sectors.  She is attending Stark State College pursuing a Bachelor’s degree in Business Administration.


Mark Michael – Vice President of Operations and General Counsel

As Vice President of Operations and General Counsel, Mark brings more than 25 years of experience in legal and academic leadership to Summit Academy Management.

Prior to joining SAM in 2018, Mark was the Director of the Office of School Sponsorship for the Ohio Department of Education for seven years. Earlier, he served as Assistant Legal Counsel for the State Board of Education and the Ohio Department of Education, assuming duties ranging from managing administrative hearing processes to providing legal counsel for community school/sponsor law, child nutrition programs, ethics, public records and several other areas.

Mark previously served as Senior Assistant Attorney General for the Ohio Attorney General’s Office (Education and Health and Human Services sections) for four years.

Mark is admitted to both the Ohio Bar Association and the U.S. District Court for the Southern District of Ohio. He earned his Juris Doctorate and Master of Laws (Taxation) from Capital University Law School and a Bachelor of Arts from The Ohio State University.

In 2014, Mark was one of 11 members selected nationally to participate in the National Association of Charter School Authorizers Leaders Program.


Mark Vlacovsky – Vice President of Finance

Mark Vlacovsky joined Summit Academy Management as Vice President of Finance in May 2020.

As a member of the Summit Academy Management Board of Directors for nearly a year, Mark brings a wealth of experience and dedication to Summit Academy.

Prior to joining SAM, Mark served as an accountant for George J. Randall, CPA, Inc. in Hiram. In this role he was responsible for client development and service, working with closely held businesses to provide compilations, tax consulting, financial statements, and financial and strategic planning services.

In addition, Mark brings 11 years of experience in higher education, including his role as treasurer for Kent State University.  As treasurer, Mark managed the daily operations and year-end financial statement reporting requirements of more than $550 million in investments and operating cash as well as the University’s debt. Prior to his promotion to the treasurer role, Mark served as a senior accountant for the KSU Foundation, managing the annual external audit process and year-end financial statements.

A past president of the Ohio Association of College and University Business Officers, Mark is a licensed CPA. He earned his B.A. in accounting from Kent State University.